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    "textoCompleto" => "<span class="elsevierStyleSections"><span id="sec0005" class="elsevierStyleSection elsevierViewall"><span class="elsevierStyleSectionTitle" id="sect0105">Introducci&#243;n</span><p id="par0005" class="elsevierStylePara elsevierViewall">El s&#237;ndrome respiratorio agudo grave causado por el virus SARS-CoV-2 &#40;a partir de ahora C-ARDS&#44; del ingl&#233;s <span class="elsevierStyleItalic">COVID-Acute Respiratory Distress Syndrome</span>&#41; ha desencadenado una crisis sanitaria global sin precedentes&#44; caracterizada por una alta tasa de morbimortalidad&#44; especialmente en pacientes con insuficiencia respiratoria aguda&#46; En este contexto&#44; la posici&#243;n de dec&#250;bito prono &#40;PDP&#41; se ha erigido en una intervenci&#243;n terap&#233;utica crucial para mejorar la oxigenaci&#243;n y la mec&#225;nica pulmonar en pacientes cr&#237;ticos<a class="elsevierStyleCrossRefs" href="#bib0155"><span class="elsevierStyleSup">1-5</span></a>&#46;</p><p id="par0010" class="elsevierStylePara elsevierViewall">Sin embargo&#44; y a pesar de su amplia adopci&#243;n en la pr&#225;ctica cl&#237;nica&#44; la duraci&#243;n &#243;ptima de la primera sesi&#243;n PDP en pacientes con C-ARDS a&#250;n no ha sido claramente definida&#46; Esta falta de consenso se suma a la escasez de evidencia sobre los efectos espec&#237;ficos de la duraci&#243;n inicial de la maniobra de dec&#250;bito prono en los resultados cl&#237;nicos a largo plazo<a class="elsevierStyleCrossRefs" href="#bib0180"><span class="elsevierStyleSup">6-9</span></a>&#46;</p><p id="par0015" class="elsevierStylePara elsevierViewall">En este contexto se plantea la hip&#243;tesis de que la duraci&#243;n de la primera PDP puede influir significativamente en la mortalidad a medio plazo en pacientes con C-ARDS&#46; Se postula que una duraci&#243;n &#243;ptima de la primera sesi&#243;n de PDP podr&#237;a correlacionarse con una mejora en la oxigenaci&#243;n y en el alivio del estr&#233;s pulmonar&#44; favoreciendo una recuperaci&#243;n pulmonar m&#225;s efectiva y una reducci&#243;n en la aparici&#243;n de complicaciones respiratorias graves&#44; y por tanto una disminuci&#243;n en la mortalidad<a class="elsevierStyleCrossRefs" href="#bib0200"><span class="elsevierStyleSup">10-14</span></a>&#46;</p><p id="par0020" class="elsevierStylePara elsevierViewall">El presente estudio tiene como objetivo investigar la asociaci&#243;n entre la duraci&#243;n de la primera PDP y la mortalidad a 90<span class="elsevierStyleHsp" style=""></span>d&#237;as en pacientes con C-ARDS&#46; Para ello&#44; se dividi&#243; a los pacientes en terciles de tiempo de duraci&#243;n de la primera maniobra de PDP y se analizar&#225;n los desenlaces cl&#237;nicos&#44; con un enfoque particular en la mortalidad a 90<span class="elsevierStyleHsp" style=""></span>d&#237;as&#46;</p></span><span id="sec0010" class="elsevierStyleSection elsevierViewall"><span class="elsevierStyleSectionTitle" id="sect0110">Material y m&#233;todos</span><p id="par0025" class="elsevierStylePara elsevierViewall">Estudio retrospectivo&#44; observacional y anal&#237;tico en el que fueron incluidos los enfermos adultos que hab&#237;an ingresado en &#225;rea-COVID del servicio de medicina intensiva con diagn&#243;stico confirmado de infecci&#243;n por SARS-CoV-2 mediante reacci&#243;n en cadena de la polimerasa &#40;PCR&#41; en c&#233;lulas del tracto respiratorio&#44; entre marzo de 2020 y marzo de 2022&#46; Los datos fueron recopilados del registro de la cohorte de pacientes con COVID-19 en un servicio de medicina intensiva de un hospital de tercer nivel&#46; Este registro se llev&#243; a cabo tras obtener la aprobaci&#243;n del Comit&#233; de &#201;tica en Investigaci&#243;n local &#40;c&#243;digo de referencia local 2020&#46;250&#41; y obtener el consentimiento informado de los pacientes o de sus representantes legales &#8212;de forma escrita y&#47;o telef&#243;nica&#8212; para introducir sus datos en el mismo&#46; Posteriormente&#44; algunos datos que no fueron inicialmente recopilados se completaron de manera retrospectiva&#46;</p><p id="par0030" class="elsevierStylePara elsevierViewall">Fueron criterios de inclusi&#243;n&#58; ser mayor de 18<span class="elsevierStyleHsp" style=""></span>a&#241;os&#44; diagn&#243;stico confirmado de enfermedad por de SARS-CoV-2 en las primeras 24<span class="elsevierStyleHsp" style=""></span>horas de ingreso hospitalario&#44; necesidad de ingreso en la unidad de cuidados intensivos &#40;UCI&#41; por insuficiencia respiratoria&#44; recibir tratamiento con ventilaci&#243;n mec&#225;nica &#40;VM&#41; por dicha causa y haber necesitado maniobra PDP como parte del tratamiento de su insuficiencia respiratoria&#46; Fueron criterios de exclusi&#243;n los registros con errores en las recogidas de las variables de an&#225;lisis y el empleo de PDP en paciente despierto&#46;</p><p id="par0035" class="elsevierStylePara elsevierViewall">El detalle de las variables registradas se muestra en el <a class="elsevierStyleCrossRef" href="#sec0040">material suplementario</a>&#46;</p><p id="par0040" class="elsevierStylePara elsevierViewall">Los enfermos fueron categorizados en terciles&#44; seg&#250;n duraci&#243;n en horas de la primera maniobra de PDP&#46; La indicaci&#243;n de PDP&#44; as&#237; como el cese de la maniobra&#44; se realizaron seg&#250;n el criterio del m&#233;dico responsable&#44; basado en las recomendaciones para el manejo de los pacientes cr&#237;ticos con COVID-19 en las UCI de la Sociedad Espa&#241;ola de Medicina Intensiva y Unidades Coronarias &#40;SEMICYUC&#41;&#44; donde se propon&#237;a una duraci&#243;n en la maniobra de PDP de al menos 16<span class="elsevierStyleHsp" style=""></span>horas<a class="elsevierStyleCrossRef" href="#bib0225"><span class="elsevierStyleSup">15</span></a>&#46; Se definieron como PDP temprano aquellos que fueron posicionados en dec&#250;bito PDP dentro de las 24<span class="elsevierStyleHsp" style=""></span>horas siguientes a su ingreso&#46;</p><p id="par0045" class="elsevierStylePara elsevierViewall">Se realiz&#243; el seguimiento de los pacientes durante 90<span class="elsevierStyleHsp" style=""></span>d&#237;as desde el momento del ingreso en la UCI o hasta su fallecimiento &#40;el hecho que se produjese primero&#41;&#46;</p><p id="par0050" class="elsevierStylePara elsevierViewall">Se realiz&#243; inicialmente un an&#225;lisis descriptivo de la muestra donde las variables categ&#243;ricas se presentan como el valor y su porcentaje&#59; y como mediana y sus percentiles 25-75 &#40;p25-75&#41; para las variables cuantitativas continuas&#46; Las comparaciones de porcentajes entre los grupos se realizaron mediante tablas de contingencia y chi cuadrado&#59; para el an&#225;lisis de las variables continuas se utiliz&#243; la prueba de Kruskal Wallis&#46;</p><p id="par0055" class="elsevierStylePara elsevierViewall">Posteriormente se llev&#243; a cabo un an&#225;lisis multivariable de la supervivencia ajustando un modelo de regresi&#243;n de Cox &#40;m&#233;todo&#58; Fordward&#59; introducci&#243;n de variables al modelo si p<span class="elsevierStyleHsp" style=""></span>&#60;<span class="elsevierStyleHsp" style=""></span>0&#44;05 y exclusi&#243;n de variables si p<span class="elsevierStyleHsp" style=""></span>&#62;<span class="elsevierStyleHsp" style=""></span>0&#44;2&#59; estado&#58; fallecimiento a los 90<span class="elsevierStyleHsp" style=""></span>d&#237;as&#59; se seleccionan las variables independientes con p<span class="elsevierStyleHsp" style=""></span>&#60;<span class="elsevierStyleHsp" style=""></span>0&#44;2 en el an&#225;lisis bivariante&#41;&#46; La medida de asociaci&#243;n se expresa mediante el uso del hazard ratio &#40;HR&#41; acompa&#241;ado de su respectivo intervalo de confianza al 95&#37; &#40;IC<span class="elsevierStyleHsp" style=""></span>95&#37;&#41;&#46; Se emple&#243; el valor del &#237;ndice de concordancia de Harrell como medida de concordancia en el modelo de regresi&#243;n de Cox&#46; Para todos los an&#225;lisis&#44; la significaci&#243;n estad&#237;stica se estableci&#243; en p<span class="elsevierStyleHsp" style=""></span>&#60;<span class="elsevierStyleHsp" style=""></span>0&#44;05&#46;</p><p id="par0060" class="elsevierStylePara elsevierViewall">Se efectu&#243; un an&#225;lisis de supervivencia a 90<span class="elsevierStyleHsp" style=""></span>d&#237;as con el m&#233;todo de Kaplan-Meier para la variable de tiempo de muerte &#40;Log-rank test&#41;&#46;</p></span><span id="sec0015" class="elsevierStyleSection elsevierViewall"><span class="elsevierStyleSectionTitle" id="sect0115">Resultados</span><p id="par0065" class="elsevierStylePara elsevierViewall">Durante el periodo analizado ingresaron un total de 911 enfermos en la UCI-COVID&#46; Con un total de 894 enfermos analizados &#40;<a class="elsevierStyleCrossRef" href="#tbl0005">tabla 1</a>&#41;&#44; se observa una distribuci&#243;n a lo largo de las diferentes oleadas de la pandemia&#44; siendo la sexta oleada la que contribuye con la mayor proporci&#243;n &#40;24&#44;5&#37;&#41;&#46; En 300 enfermos &#40;33&#37;&#41; se realiz&#243; alguna maniobra de PDP durante el ingreso en la UCI&#46; Despu&#233;s de depurar los datos se analizaron un total de 271 pacientes sometidos a PDP&#46; Ciento once pacientes &#40;41&#37;&#41; fueron categorizados en el primer tercil de duraci&#243;n &#40;horas&#41; de la primera maniobra de PDP&#44; 95 &#40;35&#37;&#41; en el segundo tercil y 65 &#40;24&#37;&#41; en el tercer tercil &#40;<a class="elsevierStyleCrossRef" href="#fig0005">fig&#46; 1</a>&#41;&#46;</p><elsevierMultimedia ident="tbl0005"></elsevierMultimedia><elsevierMultimedia ident="fig0005"></elsevierMultimedia><p id="par0070" class="elsevierStylePara elsevierViewall">Los resultados indicaron que la mediana de la duraci&#243;n del PDP fue de 14<span class="elsevierStyleHsp" style=""></span>horas &#40;IC<span class="elsevierStyleHsp" style=""></span>95&#37;&#58; 10-16<span class="elsevierStyleHsp" style=""></span>horas&#41; en el primer tercil&#44; 19<span class="elsevierStyleHsp" style=""></span>horas &#40;IC<span class="elsevierStyleHsp" style=""></span>95&#37;&#58; 18-20<span class="elsevierStyleHsp" style=""></span>horas&#41; en el segundo tercil y 22<span class="elsevierStyleHsp" style=""></span>horas &#40;IC<span class="elsevierStyleHsp" style=""></span>95&#37;&#58; 21-24<span class="elsevierStyleHsp" style=""></span>horas&#41; en el tercer tercil&#46;</p><p id="par0075" class="elsevierStylePara elsevierViewall">En el an&#225;lisis comparativo de las caracter&#237;sticas cl&#237;nico-epidemiol&#243;gicas&#44; categorizadas por terciles de tiempo de duraci&#243;n &#40;horas&#41; del primer PDP&#44; resalta la uniformidad en la presentaci&#243;n de casos a lo largo de las oleadas&#44; con ciertas variaciones en biomarcadores y estados de vacunaci&#243;n &#40;<a class="elsevierStyleCrossRef" href="#tbl0010">tabla 2</a>&#41;&#46; La prote&#237;na<span class="elsevierStyleHsp" style=""></span>C reactiva &#40;PCR&#41; mostr&#243; variabilidad media significativa entre los grupos &#40;p<span class="elsevierStyleHsp" style=""></span>&#61;<span class="elsevierStyleHsp" style=""></span>0&#44;02&#41;&#44; y la insuficiencia renal cr&#243;nica &#40;IRC&#41; fue m&#225;s pronunciada en los pacientes categorizados en el primer tercil &#40;p<span class="elsevierStyleHsp" style=""></span>&#61;<span class="elsevierStyleHsp" style=""></span>0&#44;04&#41; &#40;<a class="elsevierStyleCrossRef" href="#tbl0010">tabla 2</a>&#41;&#46;</p><elsevierMultimedia ident="tbl0010"></elsevierMultimedia><p id="par0080" class="elsevierStylePara elsevierViewall">Se evidenciaron diferencias en la presentaci&#243;n cl&#237;nica y en las estrategias terap&#233;uticas seg&#250;n el tercil &#40;<a class="elsevierStyleCrossRef" href="#tbl0015">tabla 3</a>&#41;&#58; la relaci&#243;n P&#47;F al ingreso en la UCI mostr&#243; una significativa variaci&#243;n&#44; siendo m&#225;s baja en el primer tercil &#40;p<span class="elsevierStyleHsp" style=""></span>&#60;<span class="elsevierStyleHsp" style=""></span>0&#44;05&#41;&#59; se observaron patrones diferentes en el empleo de oxigenoterapia de alto flujo &#40;CNAF&#41; en la UCI&#44; con una disminuci&#243;n significativa en su uso en el grupo de pacientes en los que la duraci&#243;n de la primera maniobra de PDP fue mayor &#40;tercer tercil&#41; &#40;p<span class="elsevierStyleHsp" style=""></span>&#61;<span class="elsevierStyleHsp" style=""></span>0&#44;05&#41;&#44; el uso de ECMO mostr&#243; variabilidad&#44; aunque sin alcanzar significaci&#243;n estad&#237;stica &#40;p<span class="elsevierStyleHsp" style=""></span>&#61;<span class="elsevierStyleHsp" style=""></span>0&#44;09&#41;&#46; El n&#250;mero de sesiones de PDP present&#243; una mediana de 2 sesiones y un rango intercuart&#237;lico de 1 a 4 sesiones en todos los grupos&#46; En t&#233;rminos de frecuencia&#44; aproximadamente una tercera parte de los pacientes tuvieron una sola sesi&#243;n de PDP&#46; Las diferencias encontradas en los grupos analizados no alcanzaron significaci&#243;n estad&#237;stica &#40;p<span class="elsevierStyleHsp" style=""></span>&#61;<span class="elsevierStyleHsp" style=""></span>0&#44;11&#41;&#46;</p><elsevierMultimedia ident="tbl0015"></elsevierMultimedia><p id="par0085" class="elsevierStylePara elsevierViewall">En el an&#225;lisis de las principales variables evolutivas entre los grupos &#40;<a class="elsevierStyleCrossRef" href="#tbl0020">tabla 4</a>&#41;&#44; ni en t&#233;rminos de duraci&#243;n VM&#44; ni de estancia en la UCI&#44; se encontraron diferencias significativas &#40;p<span class="elsevierStyleHsp" style=""></span>&#61;<span class="elsevierStyleHsp" style=""></span>0&#44;74 y p<span class="elsevierStyleHsp" style=""></span>&#61;<span class="elsevierStyleHsp" style=""></span>0&#44;88&#44; respectivamente&#41;&#46; En el diagn&#243;stico de traqueobronquitis&#47;neumon&#237;a asociada a ventilaci&#243;n mec&#225;nica &#40;TAVM&#47;NAVM&#41; se observ&#243; una tendencia a ser m&#225;s prevalentes en el segundo tercil &#40;64&#37;&#41; &#40;p<span class="elsevierStyleHsp" style=""></span>&#61;<span class="elsevierStyleHsp" style=""></span>0&#44;08&#41;&#46; Otros desenlaces evaluados&#44; como el diagn&#243;stico de tromboembolismo pulmonar &#40;TEP&#41; masivo y la necesidad de traqueostom&#237;a&#44; no mostraron diferencias sustanciales&#46;</p><elsevierMultimedia ident="tbl0020"></elsevierMultimedia><p id="par0090" class="elsevierStylePara elsevierViewall">El an&#225;lisis de supervivencia reflej&#243;&#44; para el primer tercil&#44; una media de supervivencia de 74<span class="elsevierStyleHsp" style=""></span>d&#237;as&#44; con un error est&#225;ndar &#40;SE&#41; de 2&#44;687 y un IC<span class="elsevierStyleHsp" style=""></span>95&#37; entre 69 y 79 d&#237;as&#46; En el segundo tercil&#44; la media de supervivencia fue ligeramente menor&#44; registrando 71<span class="elsevierStyleHsp" style=""></span>d&#237;as&#44; con un SE de 3&#44;191 y un IC<span class="elsevierStyleHsp" style=""></span>95&#37; entre 64 y 77 d&#237;as&#46; En contraste&#44; el tercer tercil exhibi&#243; la media de supervivencia m&#225;s alta&#44; alcanzando los 80<span class="elsevierStyleHsp" style=""></span>d&#237;as&#44; con un SE de 3&#44;085 y un IC<span class="elsevierStyleHsp" style=""></span>95&#37; entre 74 y 86 d&#237;as&#46; Utilizando la metodolog&#237;a de Kaplan-Meier y realizando la comparaci&#243;n de las curvas de supervivencia mediante la prueba de Logrank&#44; se encontr&#243; que no se alcanz&#243; significaci&#243;n estad&#237;stica &#40;p<span class="elsevierStyleHsp" style=""></span>&#61;<span class="elsevierStyleHsp" style=""></span>0&#44;11&#41;&#46; Sin embargo&#44; se observ&#243; una tendencia hacia una mayor supervivencia en el grupo con una duraci&#243;n de tiempo m&#225;s prolongada en la primera maniobra de PDP&#44; como se muestra en la <a class="elsevierStyleCrossRef" href="#fig0010">figura 2</a>&#46;</p><elsevierMultimedia ident="fig0010"></elsevierMultimedia><p id="par0095" class="elsevierStylePara elsevierViewall">Finalmente&#44; en el an&#225;lisis de regresi&#243;n de Cox para examinar el tiempo de supervivencia&#44; con un enfoque en el seguimiento a 90<span class="elsevierStyleHsp" style=""></span>d&#237;as&#44; el modelo incluy&#243; variables como la edad&#44; donde se observ&#243; que un incremento de un a&#241;o en la edad se asoci&#243; con un aumento del 7&#44;07&#37; en el riesgo de mortalidad a los 90<span class="elsevierStyleHsp" style=""></span>d&#237;as &#40;HR&#58; 1&#44;07&#59; IC<span class="elsevierStyleHsp" style=""></span>95&#37;&#58; 1&#44;03-1&#44;10&#41;&#59; los pacientes que requirieron ECMO presentaron un riesgo 4&#44;42 veces mayor de mortalidad en comparaci&#243;n con aquellos que no la necesitaron &#40;HR&#58; 4&#44;42&#59; IC<span class="elsevierStyleHsp" style=""></span>95&#37;&#58; 1&#44;52-12&#44;82&#41;&#59; el n&#250;mero de sesiones de pronaci&#243;n tambi&#233;n mostr&#243; una asociaci&#243;n significativa con la supervivencia a los 90<span class="elsevierStyleHsp" style=""></span>d&#237;as&#58; los pacientes que recibieron entre 2 y 5 sesiones de pronaci&#243;n tuvieron un riesgo 2&#44;19 veces mayor de mortalidad en comparaci&#243;n con los que recibieron sesi&#243;n &#250;nica &#40;HR&#58; 2&#44;19&#59; IC<span class="elsevierStyleHsp" style=""></span>95&#37;&#58; 1&#44;07-4&#44;49&#41;&#44; y aquellos que recibieron m&#225;s de 5 sesiones de pronaci&#243;n experimentaron un riesgo a&#250;n mayor&#44; con un aumento de 6&#44;05 veces en el riesgo de mortalidad en comparaci&#243;n con el grupo de referencia &#40;HR&#58; 6&#44;05&#59; IC<span class="elsevierStyleHsp" style=""></span>95&#37;&#58; 2&#44;78-13&#44;16&#41;&#59; el valor de P&#47;F al ingreso en la UCI se asoci&#243; de manera significativa con la supervivencia&#58; por cada unidad de aumento en el valor de P&#47;F&#44; se observ&#243; un aumento del 0&#44;68&#37; en la supervivencia a los 90<span class="elsevierStyleHsp" style=""></span>d&#237;as &#40;HR&#58; 1&#44;00&#59; IC<span class="elsevierStyleHsp" style=""></span>95&#37;&#58; 1&#44;00-1&#44;01&#41;&#46; El &#237;ndice de concordancia de Harrell fue de 0&#44;745 &#40;IC<span class="elsevierStyleHsp" style=""></span>95&#37;&#58; 0&#44;68-0&#44;80&#41;&#46; No fueron incluidas en el modelo las variables&#58; sexo&#44; valor de PCR&#44; IL-6&#44; TAVM&#47;NAVM&#44; la IRC&#44; el empleo de CNAF&#44; la duraci&#243;n de CNAF y los diferentes terciles de tiempo de duraci&#243;n del primer PDP&#46;</p></span><span id="sec0020" class="elsevierStyleSection elsevierViewall"><span class="elsevierStyleSectionTitle" id="sect0120">Discusi&#243;n</span><p id="par0100" class="elsevierStylePara elsevierViewall">El trabajo presentado no demuestra de forma estad&#237;sticamente significativa que los pacientes que m&#225;s tiempo estuvieron en PDP en la primera maniobra tuvieron una mayor supervivencia a 90<span class="elsevierStyleHsp" style=""></span>d&#237;as&#59; no obstante&#44; nuestros datos sugieren explorar m&#225;s a fondo el impacto del tiempo de PDP en la evoluci&#243;n cl&#237;nica de los pacientes con C-ARDS&#46; Por otro lado&#44; el n&#250;mero de sesiones de PDP mostr&#243; una asociaci&#243;n significativa con la mortalidad a los 90<span class="elsevierStyleHsp" style=""></span>d&#237;as&#58; los enfermos con una sesi&#243;n &#250;nica de PDP presentaron un menor riesgo de fallecer&#46;</p><p id="par0105" class="elsevierStylePara elsevierViewall">En nuestro an&#225;lisis&#44; a pesar de no haberse identificado diferencias en complicaciones espec&#237;ficas durante el per&#237;odo de estancia en la UCI que justifiquen la diferencia observada en las curvas de supervivencia a partir de la segunda semana de seguimiento&#44; es importante considerar que otros factores no evaluados en el estudio podr&#237;an estar influyendo en la mortalidad de los pacientes&#46; Estos podr&#237;an incluir la presencia de comorbilidades adicionales&#44; el tratamiento posterior a la UCI&#44; la calidad del cuidado proporcionado o las complicaciones a medio plazo no conocidas&#46; Por ejemplo&#44; la modificaci&#243;n de la estructura de trabajo&#44; junto con otros factores&#44; podr&#237;a haber influido de manera arbitraria en el momento en que se decidi&#243; realizar la intubaci&#243;n y comenzar la ventilaci&#243;n mec&#225;nica con estrategias protectoras&#44; as&#237; como en la implementaci&#243;n de maniobras como el dec&#250;bito prono&#46; De hecho&#44; observamos como los pacientes en los que la primera PDP fue mayor&#44; el empleo de CNAF previo a la VM tambi&#233;n fue mayor&#44; pudiendo desencadenar un retraso en la intubaci&#243;n que conocemos puede dar lugar a un peor pron&#243;stico<a class="elsevierStyleCrossRefs" href="#bib0230"><span class="elsevierStyleSup">16&#44;17</span></a>&#46;</p><p id="par0110" class="elsevierStylePara elsevierViewall">La justificaci&#243;n cl&#237;nica para ampliar la duraci&#243;n de las sesiones de PDP se basa en el principal beneficio de esta posici&#243;n&#58; homogeneizar el estr&#233;s y la tensi&#243;n aplicada por la ventilaci&#243;n mec&#225;nica en los pulmones&#46; La PDP promueve una distribuci&#243;n m&#225;s uniforme del volumen de ventilaci&#243;n&#46; Los estudios han demostrado que la PDP puede mejorar la homogeneizaci&#243;n de la presi&#243;n pleural y la reapertura de unidades alveolares posteriores&#46; Desde el punto de vista organizativo&#44; ampliar las sesiones de PP a m&#225;s de 24<span class="elsevierStyleHsp" style=""></span>horas puede reducir significativamente la carga de trabajo&#44; el riesgo de complicaciones asociadas con la rotaci&#243;n frecuente y la exposici&#243;n viral&#46; Adem&#225;s&#44; podr&#237;a aumentar la adherencia a la posici&#243;n prona al concentrar los retornos a la posici&#243;n supina durante el d&#237;a&#44; mejorando as&#237; la seguridad del procedimiento&#46; Sin embargo&#44; ampliar la duraci&#243;n de la PDP no est&#225; exento de riesgos&#58; mayor riesgo de lesiones por presi&#243;n&#44; mayor incidencia de lesiones relacionadas con el cat&#233;ter&#44; interrupci&#243;n de la alimentaci&#243;n enteral&#44; plexopat&#237;as o par&#225;lisis del plexo braquial&#44; entre otras<a class="elsevierStyleCrossRef" href="#bib0240"><span class="elsevierStyleSup">18</span></a>&#46;</p><p id="par0115" class="elsevierStylePara elsevierViewall">En el an&#225;lisis efectuado&#44; la categorizaci&#243;n de los pacientes por terciles se fundamenta en la mayor sensibilidad a las variaciones en los datos &#40;beneficioso para capturar con mayor detalle las diferencias entre los valores&#41;&#44; en la simplificaci&#243;n de la interpretaci&#243;n y la comunicaci&#243;n de los resultados&#44; en su utilidad para analizar o resaltar diferencias en las colas de las distribuciones y en la facilidad de comparaci&#243;n entre grupos terciles&#58; un grupo de duraci&#243;n intermedia&#44; con dos grupos &#40;de mayor y de menor duraci&#243;n&#41; para su comparaci&#243;n<a class="elsevierStyleCrossRef" href="#bib0245"><span class="elsevierStyleSup">19</span></a>&#46;</p><p id="par0120" class="elsevierStylePara elsevierViewall">En primer lugar&#44; es importante destacar que el fracaso de los primeros estudios para demostrar un beneficio en la supervivencia de la PDP en el s&#237;ndrome de distr&#233;s respiratorio agudo &#40;SDRA&#41; se ha atribuido &#40;al margen de la aplicaci&#243;n de ventilaci&#243;n mec&#225;nica protectora&#41; tanto a la duraci&#243;n insuficiente como al inicio tard&#237;o de la misma<a class="elsevierStyleCrossRefs" href="#bib0250"><span class="elsevierStyleSup">20-22</span></a>&#46; Las recomendaciones para el manejo de los pacientes cr&#237;ticos con COVID-19 en las UCI de la Sociedad Espa&#241;ola de Medicina Intensiva y Unidades Coronarias &#40;SEMICYUC&#41; propon&#237;an una duraci&#243;n en la maniobra de PDP de al menos 16<span class="elsevierStyleHsp" style=""></span>horas<a class="elsevierStyleCrossRef" href="#bib0225"><span class="elsevierStyleSup">15</span></a>&#46; Estas recomendaciones se fundamentaban principalmente en el trabajo de Gu&#233;rin et al&#46;<a class="elsevierStyleCrossRef" href="#bib0155"><span class="elsevierStyleSup">1</span></a>&#44; en el cual se evidenci&#243; un descenso notable en la mortalidad del 41&#37; al 23&#44;6&#37; &#40;p<span class="elsevierStyleHsp" style=""></span>&#61;<span class="elsevierStyleHsp" style=""></span>0&#44;001&#41; cuando se aplicaron sesiones &#40;4<span class="elsevierStyleHsp" style=""></span>d&#237;as&#41; de PDP de 17<span class="elsevierStyleHsp" style=""></span>horas en pacientes con un P&#47;F media de 100<span class="elsevierStyleHsp" style=""></span>&#177;<span class="elsevierStyleHsp" style=""></span>30<span class="elsevierStyleHsp" style=""></span>mmHg y ventilaci&#243;n protectora &#40;volumen corriente de 6<span class="elsevierStyleHsp" style=""></span>ml&#47;kg&#41;&#46;</p><p id="par0125" class="elsevierStylePara elsevierViewall">No obstante&#44; durante la pandemia el n&#250;mero de pacientes que requirieron PDP se increment&#243;&#44; y bien por sobrecarga asistencial o por su mayor gravedad&#44; algunos pacientes se mantuvieron en PDP durante periodos m&#225;s prolongados<a class="elsevierStyleCrossRef" href="#bib0240"><span class="elsevierStyleSup">18</span></a>&#58; lo que algunos autores denominan PDP extendida&#46; Sin embargo&#44; la PDP extendida ya hab&#237;a sido descrita pre-pandemia en peque&#241;os estudios pseudo-aleatorizados<a class="elsevierStyleCrossRef" href="#bib0265"><span class="elsevierStyleSup">23</span></a> y estudios monoc&#233;ntricos retrospectivos&#44; donde la heterogeneidad de las muestras&#44; el escaso n&#250;mero de pacientes y las diferentes variaciones en titulaci&#243;n de presi&#243;n positiva al final de la espiraci&#243;n &#40;PEEP&#41;&#44; criterios para la finalizaci&#243;n de sesiones y seguimiento&#44; no permit&#237;an extraer conclusiones en relaci&#243;n con la supervivencia de los pacientes<a class="elsevierStyleCrossRefs" href="#bib0270"><span class="elsevierStyleSup">24-26</span></a>&#46; Aun as&#237;&#44; muchos de estos trabajos reportaban mejoras notables en valores de oxigenaci&#243;n de los pacientes en PDP extendida frente a las maniobras convencionales&#46;</p><p id="par0130" class="elsevierStylePara elsevierViewall">Durante la pandemia&#44; varios centros publicaron su experiencia sobre la implementaci&#243;n de PDP extendida en pacientes C-ARDS en ventilaci&#243;n mec&#225;nica&#46; En los estudios m&#225;s relevantes destacan&#44; por un lado&#44; las estrategias organizativas&#44; como el protocolo de &#171;dos noches&#187; con una duraci&#243;n mediana de PDP de 39<span class="elsevierStyleHsp" style=""></span>horas &#91;rango intercuart&#237;lico de 34-42&#93;&#46; Este protocolo permiti&#243; el aumento en la relaci&#243;n P&#47;F durante la primera sesi&#243;n de PDP que se asoci&#243; con una reducci&#243;n de la mortalidad en la UCI&#46; Por otro lado&#44; se establecieron las estrategias cl&#237;nicas&#58; una vez iniciado el PDP&#44; este se mantiene hasta la mejor&#237;a cl&#237;nica&#46; Se suprime por completo el alternar entre el PDP y la posici&#243;n supina&#46; Esta estrategia fue descrita por primera vez a gran escala para el C-ARDS por Douglas et al&#46;<a class="elsevierStyleCrossRef" href="#bib0285"><span class="elsevierStyleSup">27</span></a>&#46; Las sesiones de PDP se mantuvieron hasta que los pacientes alcanzaron los siguientes criterios&#58; relaci&#243;n P&#47;F &#62;<span class="elsevierStyleHsp" style=""></span>150 con FiO<span class="elsevierStyleInf">2</span> &#62;<span class="elsevierStyleHsp" style=""></span>60&#37; y niveles de PEEP &#60;<span class="elsevierStyleHsp" style=""></span>10<span class="elsevierStyleHsp" style=""></span>cmH<span class="elsevierStyleInf">2</span>O&#46; Este protocolo result&#243; en sesiones de una duraci&#243;n mediana de 2&#44;95<span class="elsevierStyleHsp" style=""></span>d&#237;as entre los sobrevivientes y 3&#44;3<span class="elsevierStyleHsp" style=""></span>d&#237;as entre los no sobrevivientes&#44; con una cuarta parte de las sesiones de los no sobrevivientes que duraron al menos 6&#44;6<span class="elsevierStyleHsp" style=""></span>d&#237;as&#46;</p><p id="par0135" class="elsevierStylePara elsevierViewall">Finalmente&#44; un solo estudio evalu&#243; la asociaci&#243;n causal entre la duraci&#243;n prolongada del PDP cl&#237;nicamente dirigido y la mortalidad<a class="elsevierStyleCrossRef" href="#bib0290"><span class="elsevierStyleSup">28</span></a>&#46; En este estudio retrospectivo multic&#233;ntrico se incluy&#243; un total de 263 pacientes&#46; La duraci&#243;n mediana del PDP en el grupo de duraci&#243;n prolongada fue de 40<span class="elsevierStyleHsp" style=""></span>horas&#44; y la duraci&#243;n m&#225;xima de una sola sesi&#243;n fue mayor de 10<span class="elsevierStyleHsp" style=""></span>d&#237;as&#46; La duraci&#243;n mediana del PDP en el grupo de duraci&#243;n de PDP est&#225;ndar fue de 17<span class="elsevierStyleHsp" style=""></span>horas&#46; En el estudio&#44; los pacientes en el grupo de duraci&#243;n prolongada de la PDP experimentaron una tasa de mortalidad a 3<span class="elsevierStyleHsp" style=""></span>meses m&#225;s baja que los pacientes en el grupo de duraci&#243;n est&#225;ndar &#40;HR&#58; 0&#44;47&#59; IC<span class="elsevierStyleHsp" style=""></span>95&#37;&#58; 0&#44;34-0&#44;67&#59; p<span class="elsevierStyleHsp" style=""></span>&#60;<span class="elsevierStyleHsp" style=""></span>0&#44;001&#41;&#46;</p><p id="par0140" class="elsevierStylePara elsevierViewall">En el estudio exclusivo del primer ciclo de PDP de Gonzalez et al&#46;<a class="elsevierStyleCrossRef" href="#bib0295"><span class="elsevierStyleSup">29</span></a>&#44; donde se analizan las caracter&#237;sticas&#44; los cambios en la oxigenaci&#243;n y la mec&#225;nica pulmonar en pacientes con C-ARDS tratados con PDP&#44; evaluando la respuesta en la primera maniobra&#44; la mortalidad fue significativamente menor en aquellos pacientes cuya oxigenaci&#243;n aument&#243; despu&#233;s de la posici&#243;n prona&#46; Se identificaron como factores independientes asociados con la mortalidad la edad&#44; el aumento porcentual en P&#47;F despu&#233;s de 24<span class="elsevierStyleHsp" style=""></span>horas en PDP y el n&#250;mero de ciclos&#46;</p><p id="par0145" class="elsevierStylePara elsevierViewall">En nuestro medio&#44; en el estudio de De Miguel Balsa et al&#46;<a class="elsevierStyleCrossRef" href="#bib0300"><span class="elsevierStyleSup">30</span></a>&#44; donde el objetivo fue describir las caracter&#237;sticas de los pacientes C-ARDS en ventilaci&#243;n mec&#225;nica invasiva &#40;VMI&#41; y analizar el efecto del dec&#250;bito prono prolongado &#40;&#62;<span class="elsevierStyleHsp" style=""></span>24<span class="elsevierStyleHsp" style=""></span>h&#41; en comparaci&#243;n con el dec&#250;bito prono de menos de 24<span class="elsevierStyleHsp" style=""></span>h&#44; se observ&#243; que el dec&#250;bito prono prolongado se asoci&#243; con una menor tolerancia a la ventilaci&#243;n en dec&#250;bito supino&#44; una mayor estancia hospitalaria&#44; m&#225;s d&#237;as de VMI&#44; una mayor duraci&#243;n del tratamiento con bloqueo neuromuscular y un mayor porcentaje de episodios de obstrucci&#243;n del tubo orotraqueal&#46;</p><p id="par0150" class="elsevierStylePara elsevierViewall">Bas&#225;ndonos en los resultados de nuestro an&#225;lisis y en la revisi&#243;n de la literatura&#44; surge la posibilidad de plantear la hip&#243;tesis de que prolongar la PDP m&#225;s all&#225; de las 16<span class="elsevierStyleHsp" style=""></span>horas&#44; que es la recomendaci&#243;n actual predominante&#44; podr&#237;a ser factible en t&#233;rminos de supervivencia&#46; Sin embargo&#44; a&#250;n queda por determinar qu&#233; enfoque para extender esta duraci&#243;n resulta m&#225;s adecuado&#58; &#191;una duraci&#243;n fija establecida por la organizaci&#243;n asistencial o la aplicaci&#243;n de criterios cl&#237;nicos para determinar el fin de la PDP&#63; Evidentemente&#44; se requieren m&#225;s investigaciones prospectivas e intervencionistas para evaluar estos hallazgos de manera exhaustiva&#46;</p><p id="par0155" class="elsevierStylePara elsevierViewall">Adem&#225;s de las limitaciones propias de un estudio retrospectivo&#44; el presente trabajo presenta la limitaci&#243;n de indicaciones de la PDP basadas en el criterio del m&#233;dico responsable&#44; sin un protocolo fijo y estandarizado&#46; A pesar de ello&#44; no se observaron diferencias significativas en las variables relacionadas con el momento de indicaci&#243;n&#44; lo que sugiere que la variabilidad en la decisi&#243;n m&#233;dica no tuvo un impacto estad&#237;sticamente significativo en los resultados obtenidos&#46; La falta de datos en relaci&#243;n con la oxigenaci&#243;n y la mec&#225;nica pulmonar que justificaron el cese de las maniobras tambi&#233;n limita en parte el estudio&#46; Por otro lado&#44; algunas de las variables no introducidas en el modelo pudieran estar altamente correlacionadas con otras variables predictoras ya incluidas en el modelo&#46; Otra limitaci&#243;n que merece discusi&#243;n es el porcentaje de p&#233;rdidas de pacientes durante el seguimiento&#46; Observamos que aproximadamente el 10&#37; de los pacientes sometidos a pronaci&#243;n &#40;29 de 300&#41; se perdieron durante el estudio&#44; no siendo posible constatar si estas p&#233;rdidas fueron aleatorias o si estuvieron influenciadas por factores espec&#237;ficos&#44; como la gravedad de la enfermedad o el momento particular de la pandemia&#46; La posibilidad de sesgo en la selecci&#243;n de los pacientes perdidos podr&#237;a tener implicaciones en la interpretaci&#243;n de nuestros resultados y en la generalizaci&#243;n de los hallazgos&#46; Adem&#225;s&#44; es relevante discutir el efecto de la imprecisi&#243;n de las estimaciones debido al tama&#241;o muestral&#46; Reconocemos que&#44; dada la naturaleza del estudio y el tama&#241;o de la muestra&#44; puede haber limitaciones en la precisi&#243;n de nuestros resultados&#46; Finalmente&#44; es importante destacar que no fue recogida la justificaci&#243;n de suspensi&#243;n precoz de la primera maniobra PDP&#58; no se puede justificar porque algunos pacientes incluidos en el primer tercil recibieron una duraci&#243;n de PDP insuficiente seg&#250;n el estudio PROSEVA<a class="elsevierStyleCrossRef" href="#bib0155"><span class="elsevierStyleSup">1</span></a>&#46;</p></span><span id="sec0025" class="elsevierStyleSection elsevierViewall"><span class="elsevierStyleSectionTitle" id="sect0125">Financiaci&#243;n</span><p id="par0160" class="elsevierStylePara elsevierViewall">El presente manuscrito no ha recibido financiaci&#243;n alguna&#46;</p></span><span id="sec0030" class="elsevierStyleSection elsevierViewall"><span class="elsevierStyleSectionTitle" id="sect0130">Autor&#237;a</span><p id="par0165" class="elsevierStylePara elsevierViewall">Alejandro Gonz&#225;lez-Castro&#58; ideaci&#243;n&#44; elaboraci&#243;n y redacci&#243;n del manuscrito&#46;</p><p id="par0170" class="elsevierStylePara elsevierViewall">Elena Cuenca Fito&#58; recogida de datos&#46;</p><p id="par0175" class="elsevierStylePara elsevierViewall">Yhivian Pe&#241;asco&#58; elaboraci&#243;n&#44; correcci&#243;n&#46;</p><p id="par0180" class="elsevierStylePara elsevierViewall">Carmen Huertas&#58; depuraci&#243;n de la base de datos&#46;</p><p id="par0185" class="elsevierStylePara elsevierViewall">Camilo Gonzalez&#58; redacci&#243;n&#44; correci&#243;n&#46;</p><p id="par0190" class="elsevierStylePara elsevierViewall">Juan Carlos Rodr&#237;guez Borreg&#225;n&#58; elaboraci&#243;n&#44; correcci&#243;n&#46;</p></span><span id="sec0035" class="elsevierStyleSection elsevierViewall"><span class="elsevierStyleSectionTitle" id="sect0135">Conflicto de intereses</span><p id="par0200" class="elsevierStylePara elsevierViewall">Los autores declaran no tener ning&#250;n conflicto de intereses&#46;</p></span></span>"
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        "resumen" => "<span id="abst0005" class="elsevierStyleSection elsevierViewall"><span class="elsevierStyleSectionTitle" id="sect0010">Objetivo</span><p id="spar0005" class="elsevierStyleSimplePara elsevierViewall">Investigar la asociaci&#243;n entre la duraci&#243;n de la primera maniobra de posici&#243;n en dec&#250;bito prono &#40;PDP&#41; y la mortalidad a 90<span class="elsevierStyleHsp" style=""></span>d&#237;as en pacientes con C-ARDS&#46;</p></span> <span id="abst0010" class="elsevierStyleSection elsevierViewall"><span class="elsevierStyleSectionTitle" id="sect0015">Dise&#241;o</span><p id="spar0010" class="elsevierStyleSimplePara elsevierViewall">Estudio retrospectivo&#44; observacional y anal&#237;tico&#46;</p></span> <span id="abst0015" class="elsevierStyleSection elsevierViewall"><span class="elsevierStyleSectionTitle" id="sect0020">&#193;mbito</span><p id="spar0015" class="elsevierStyleSimplePara elsevierViewall">UCI-COVID de hospital terciario&#46;</p></span> <span id="abst0020" class="elsevierStyleSection elsevierViewall"><span class="elsevierStyleSectionTitle" id="sect0025">Pacientes</span><p id="spar0020" class="elsevierStyleSimplePara elsevierViewall">Mayores de 18 a&#241;os&#44; con diagn&#243;stico confirmado de enfermedad por SARS-CoV-2 que necesitaron de maniobra de PDP&#46;</p></span> <span id="abst0025" class="elsevierStyleSection elsevierViewall"><span class="elsevierStyleSectionTitle" id="sect0030">Intervenciones</span><p id="spar0025" class="elsevierStyleSimplePara elsevierViewall">An&#225;lisis multivariable de supervivencia a 90<span class="elsevierStyleHsp" style=""></span>d&#237;as&#46;</p></span> <span id="abst0030" class="elsevierStyleSection elsevierViewall"><span class="elsevierStyleSectionTitle" id="sect0035">Variables de inter&#233;s principales</span><p id="spar0030" class="elsevierStyleSimplePara elsevierViewall">Duraci&#243;n de la primera PDP&#44; n&#250;mero de sesiones de PDP&#44; mortalidad a 90<span class="elsevierStyleHsp" style=""></span>d&#237;as&#46;</p></span> <span id="abst0035" class="elsevierStyleSection elsevierViewall"><span class="elsevierStyleSectionTitle" id="sect0040">Resultados</span><p id="spar0035" class="elsevierStyleSimplePara elsevierViewall">271 pacientes sometidos a PDP fueron analizados&#58; primer tercil &#40;n<span class="elsevierStyleHsp" style=""></span>&#61;<span class="elsevierStyleHsp" style=""></span>111&#41;&#44; segundo tercil &#40;n<span class="elsevierStyleHsp" style=""></span>&#61;<span class="elsevierStyleHsp" style=""></span>95&#41; y tercer tercil &#40;n<span class="elsevierStyleHsp" style=""></span>&#61;<span class="elsevierStyleHsp" style=""></span>65&#41;&#46; Los resultados indicaron que la mediana de la duraci&#243;n del PDP fue de 14<span class="elsevierStyleHsp" style=""></span>horas &#40;IC<span class="elsevierStyleHsp" style=""></span>95&#37;&#58; 10-16<span class="elsevierStyleHsp" style=""></span>horas&#41; en el primer tercil&#44; 19<span class="elsevierStyleHsp" style=""></span>horas &#40;IC<span class="elsevierStyleHsp" style=""></span>95&#37;&#58; 18-20<span class="elsevierStyleHsp" style=""></span>horas&#41; en el segundo tercil y 22<span class="elsevierStyleHsp" style=""></span>horas &#40;IC<span class="elsevierStyleHsp" style=""></span>95&#37;&#58; 21-24<span class="elsevierStyleHsp" style=""></span>horas&#41; en el tercer tercil&#46; La comparaci&#243;n de las curvas de supervivencia a trav&#233;s de la prueba de Logrank no alcanz&#243; significaci&#243;n estad&#237;stica &#40;p<span class="elsevierStyleHsp" style=""></span>&#61;<span class="elsevierStyleHsp" style=""></span>0&#44;11&#41;&#46; El an&#225;lisis de regresi&#243;n de Cox evidenci&#243; asociaci&#243;n entre el n&#250;mero de sesiones de pronaci&#243;n &#8212;los pacientes que recibieron entre 2 y 5 sesiones &#40;HR&#58; 2&#44;19&#59; IC<span class="elsevierStyleHsp" style=""></span>95&#37;&#58; 1&#44;07-4&#44;49&#41; y aquellos que recibieron m&#225;s de 5 sesiones &#40;HR&#58; 6&#44;05&#59; IC<span class="elsevierStyleHsp" style=""></span>95&#37;&#58; 2&#44;78-13&#44;16&#41;&#8212; y la mortalidad a 90<span class="elsevierStyleHsp" style=""></span>d&#237;as&#46;</p></span> <span id="abst0040" class="elsevierStyleSection elsevierViewall"><span class="elsevierStyleSectionTitle" id="sect0045">Conclusiones</span><p id="spar0040" class="elsevierStyleSimplePara elsevierViewall">Mientras que la duraci&#243;n del PDP no parece influir de forma significativa en la mortalidad a 90<span class="elsevierStyleHsp" style=""></span>d&#237;as&#44; el n&#250;mero de sesiones de pronaci&#243;n se identifica como un factor significativo asociado con un mayor riesgo de mortalidad&#46;</p></span>"
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            "titulo" => "Intervenciones"
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            "titulo" => "Variables de inter&#233;s principales"
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            "titulo" => "Resultados"
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        "titulo" => "Abstract"
        "resumen" => "<span id="abst0045" class="elsevierStyleSection elsevierViewall"><span class="elsevierStyleSectionTitle" id="sect0055">Objective</span><p id="spar0045" class="elsevierStyleSimplePara elsevierViewall">To investigate the association between the duration of the first prone positioning maneuver &#40;PPM&#41; and 90-day mortality in patients with C-ARDS&#46;</p></span> <span id="abst0050" class="elsevierStyleSection elsevierViewall"><span class="elsevierStyleSectionTitle" id="sect0060">Design</span><p id="spar0050" class="elsevierStyleSimplePara elsevierViewall">Retrospective&#44; observational&#44; and analytical study&#46;</p></span> <span id="abst0055" class="elsevierStyleSection elsevierViewall"><span class="elsevierStyleSectionTitle" id="sect0065">Setting</span><p id="spar0055" class="elsevierStyleSimplePara elsevierViewall">COVID-19 ICU of a tertiary hospital&#46;</p></span> <span id="abst0060" class="elsevierStyleSection elsevierViewall"><span class="elsevierStyleSectionTitle" id="sect0070">Patients</span><p id="spar0060" class="elsevierStyleSimplePara elsevierViewall">Adults over 18<span class="elsevierStyleHsp" style=""></span>years old&#44; with a confirmed diagnosis of SARS-CoV-2 disease requiring PPM&#46;</p></span> <span id="abst0065" class="elsevierStyleSection elsevierViewall"><span class="elsevierStyleSectionTitle" id="sect0075">Interventions</span><p id="spar0065" class="elsevierStyleSimplePara elsevierViewall">Multivariable analysis of 90-day survival&#46;</p></span> <span id="abst0070" class="elsevierStyleSection elsevierViewall"><span class="elsevierStyleSectionTitle" id="sect0080">Main variables of interest</span><p id="spar0070" class="elsevierStyleSimplePara elsevierViewall">Duration of the first PPM&#44; number of PPM sessions&#44; 90-day mortality&#46;</p></span> <span id="abst0075" class="elsevierStyleSection elsevierViewall"><span class="elsevierStyleSectionTitle" id="sect0085">Results</span><p id="spar0075" class="elsevierStyleSimplePara elsevierViewall">271 patients undergoing PPM were analyzed&#58; first tertile &#40;n<span class="elsevierStyleHsp" style=""></span>&#61;<span class="elsevierStyleHsp" style=""></span>111&#41;&#44; second tertile &#40;n<span class="elsevierStyleHsp" style=""></span>&#61;<span class="elsevierStyleHsp" style=""></span>95&#41; and third tertile &#40;n<span class="elsevierStyleHsp" style=""></span>&#61;<span class="elsevierStyleHsp" style=""></span>65&#41;&#46; The results indicated that the median duration of PDP was 14<span class="elsevierStyleHsp" style=""></span>hours &#40;95&#37;<span class="elsevierStyleHsp" style=""></span>CI&#58; 10-16<span class="elsevierStyleHsp" style=""></span>hours&#41; in the first tertile&#44; 19<span class="elsevierStyleHsp" style=""></span>hours &#40;95&#37;<span class="elsevierStyleHsp" style=""></span>CI&#58; 18-20<span class="elsevierStyleHsp" style=""></span>hours&#41; in the second tertile and 22<span class="elsevierStyleHsp" style=""></span>hours &#40;95&#37;<span class="elsevierStyleHsp" style=""></span>CI&#58; 21-24<span class="elsevierStyleHsp" style=""></span>hours&#41; in the third tertile&#46; Comparison of survival curves using the Logrank test did not reach statistical significance &#40;<span class="elsevierStyleItalic">P</span><span class="elsevierStyleHsp" style=""></span>&#61;<span class="elsevierStyleHsp" style=""></span>&#46;11&#41;&#46; Cox Regression analysis showed an association between the number of pronation sessions &#8212; patients receiving between 2 and 5 sessions &#40;HR&#58; 2&#46;19&#59; 95&#37;<span class="elsevierStyleHsp" style=""></span>CI&#58; 1&#46;07-4&#46;49&#41; and those receiving more than 5 sessions &#40;HR&#58; 6&#46;05&#59; 95&#37;<span class="elsevierStyleHsp" style=""></span>CI&#58; 2&#46;78-13&#46;16 &#8212; and 90-day mortality&#46;</p></span> <span id="abst0080" class="elsevierStyleSection elsevierViewall"><span class="elsevierStyleSectionTitle" id="sect0090">Conclusions</span><p id="spar0080" class="elsevierStyleSimplePara elsevierViewall">While the duration of PDP does not appear to significantly influence 90-day mortality&#44; the number of pronation sessions is identified as a significant factor associated with an increased risk of mortality&#46;</p></span>"
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            "identificador" => "abst0045"
            "titulo" => "Objective"
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            "titulo" => "Interventions"
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            "titulo" => "Material adicional"
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          "es" => "<p id="spar0090" class="elsevierStyleSimplePara elsevierViewall">Curva de supervivencia Kaplan-Meier a 90<span class="elsevierStyleHsp" style=""></span>d&#237;as categorizada por grupos analizados&#46;</p>"
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                  \t\t\t\t\ttable-entry\n
                  \t\t\t\t ; entry_with_role_rowhead " align="left" valign="\n
                  \t\t\t\t\ttop\n
                  \t\t\t\t"><span class="elsevierStyleItalic">Fumador&#44; n &#40;&#37;&#41;</span>&nbsp;\t\t\t\t\t\t\n
                  \t\t\t\t</td><td class="td" title="\n
                  \t\t\t\t\ttable-entry\n
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                  \t\t\t\t</td></tr><tr title="table-row"><td class="td-with-role" title="\n
                  \t\t\t\t\ttable-entry\n
                  \t\t\t\t ; entry_with_role_rowhead " align="left" valign="\n
                  \t\t\t\t\ttop\n
                  \t\t\t\t"><span class="elsevierStyleItalic">SOFA&#44; mediana &#40;p25-p75&#41;</span>&nbsp;\t\t\t\t\t\t\n
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                  \t\t\t\t  " align="left" valign="\n
                  \t\t\t\t\ttop\n
                  \t\t\t\t">5 &#40;4-6&#41;&nbsp;\t\t\t\t\t\t\n
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                  \t\t\t\t\ttable-entry\n
                  \t\t\t\t ; entry_with_role_rowhead " align="left" valign="\n
                  \t\t\t\t\ttop\n
                  \t\t\t\t"><span class="elsevierStyleItalic">Motivo principal de ingreso IRA&#44; n &#40;&#37;&#41;</span>&nbsp;\t\t\t\t\t\t\n
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                  \t\t\t\t\ttop\n
                  \t\t\t\t">775 &#40;88&#37;&#41;&nbsp;\t\t\t\t\t\t\n
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                  \t\t\t\t\ttable-entry\n
                  \t\t\t\t ; entry_with_role_rowhead " align="left" valign="\n
                  \t\t\t\t\ttop\n
                  \t\t\t\t"><span class="elsevierStyleItalic">P&#47;F al ingreso en UCI&#44; mmHg&#44; mediana &#40;p25-p75&#41;</span>&nbsp;\t\t\t\t\t\t\n
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                  \t\t\t\t  " align="left" valign="\n
                  \t\t\t\t\ttop\n
                  \t\t\t\t">146 &#40;114-187&#41;&nbsp;\t\t\t\t\t\t\n
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                  \t\t\t\t\ttable-entry\n
                  \t\t\t\t ; entry_with_role_rowhead " align="left" valign="\n
                  \t\t\t\t\ttop\n
                  \t\t\t\t"><span class="elsevierStyleItalic">Necesidad de VMI&#44; n &#40;&#37;&#41;</span>&nbsp;\t\t\t\t\t\t\n
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                  \t\t\t\t\ttable-entry\n
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                  \t\t\t\t\ttop\n
                  \t\t\t\t">571 &#40;64&#37;&#41;&nbsp;\t\t\t\t\t\t\n
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                  \t\t\t\t\ttable-entry\n
                  \t\t\t\t ; entry_with_role_rowhead " align="left" valign="\n
                  \t\t\t\t\ttop\n
                  \t\t\t\t"><span class="elsevierStyleItalic">Terapia dec&#250;bito prono&#44; n &#40;&#37;&#41;</span>&nbsp;\t\t\t\t\t\t\n
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                  \t\t\t\t\ttable-entry\n
                  \t\t\t\t  " align="left" valign="\n
                  \t\t\t\t\ttop\n
                  \t\t\t\t">300 &#40;33&#37;&#41;&nbsp;\t\t\t\t\t\t\n
                  \t\t\t\t</td></tr><tr title="table-row"><td class="td-with-role" title="\n
                  \t\t\t\t\ttable-entry\n
                  \t\t\t\t ; entry_with_role_rowhead " align="left" valign="\n
                  \t\t\t\t\ttop\n
                  \t\t\t\t"><span class="elsevierStyleItalic">Empleo de corticoides&#44; n &#40;&#37;&#41;</span>&nbsp;\t\t\t\t\t\t\n
                  \t\t\t\t</td><td class="td" title="\n
                  \t\t\t\t\ttable-entry\n
                  \t\t\t\t  " align="left" valign="\n
                  \t\t\t\t\ttop\n
                  \t\t\t\t">654 &#40;73&#37;&#41;&nbsp;\t\t\t\t\t\t\n
                  \t\t\t\t</td></tr><tr title="table-row"><td class="td-with-role" title="\n
                  \t\t\t\t\ttable-entry\n
                  \t\t\t\t ; entry_with_role_rowhead " align="left" valign="\n
                  \t\t\t\t\ttop\n
                  \t\t\t\t"><span class="elsevierStyleItalic">D&#237;as de VM&#44; mediana &#40;p25-p75&#41;</span>&nbsp;\t\t\t\t\t\t\n
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                  \t\t\t\t\ttable-entry\n
                  \t\t\t\t  " align="left" valign="\n
                  \t\t\t\t\ttop\n
                  \t\t\t\t">9 &#40;5-16&#41;&nbsp;\t\t\t\t\t\t\n
                  \t\t\t\t</td></tr><tr title="table-row"><td class="td-with-role" title="\n
                  \t\t\t\t\ttable-entry\n
                  \t\t\t\t ; entry_with_role_rowhead " align="left" valign="\n
                  \t\t\t\t\ttop\n
                  \t\t\t\t"><span class="elsevierStyleItalic">Estancia UCI &#40;d&#237;as&#41;&#44; mediana &#40;p25-p75&#41;</span>&nbsp;\t\t\t\t\t\t\n
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                  \t\t\t\t\ttable-entry\n
                  \t\t\t\t  " align="left" valign="\n
                  \t\t\t\t\ttop\n
                  \t\t\t\t">9 &#40;4-17&#41;&nbsp;\t\t\t\t\t\t\n
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                  \t\t\t\t" scope="col" style="border-bottom: 2px solid black">Primer tercil14 horas &#40;IC<span class="elsevierStyleHsp" style=""></span>95&#37;&#58; 10-16&#41;n<span class="elsevierStyleHsp" style=""></span>&#61;<span class="elsevierStyleHsp" style=""></span>111&nbsp;\t\t\t\t\t\t\n
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                  \t\t\t\t" scope="col" style="border-bottom: 2px solid black">Tercer tercil22 horas &#40;IC<span class="elsevierStyleHsp" style=""></span>95&#37;&#58; 21-24&#41;n<span class="elsevierStyleHsp" style=""></span>&#61;<span class="elsevierStyleHsp" style=""></span>65&nbsp;\t\t\t\t\t\t\n
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                  \t\t\t\t</td><td class="td" title="\n
                  \t\t\t\t\ttable-entry\n
                  \t\t\t\t  " align="left" valign="\n
                  \t\t\t\t\ttop\n
                  \t\t\t\t">12 &#40;18&#37;&#41;14 &#40;21&#37;&#41;15 &#40;23&#37;&#41;10 &#40;15&#37;&#41;6 &#40;9&#37;&#41;8 &#40;12&#37;&#41;&nbsp;\t\t\t\t\t\t\n
                  \t\t\t\t</td><td class="td" title="\n
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                  \t\t\t\t">0&#44;36&nbsp;\t\t\t\t\t\t\n
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                  \t\t\t\t\ttable-entry\n
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                  \t\t\t\t  " align="" valign="\n
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                  \t\t\t\t">&nbsp;\t\t\t\t\t\t\n
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                  \t\t\t\t">&nbsp;\t\t\t\t\t\t\n
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                  \t\t\t\t\ttop\n
                  \t\t\t\t">&nbsp;\t\t\t\t\t\t\n
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                  \t\t\t\t\ttable-entry\n
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                  \t\t\t\t">65 &#40;56-72&#41;&nbsp;\t\t\t\t\t\t\n
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                  \t\t\t\t\ttable-entry\n
                  \t\t\t\t  " align="left" valign="\n
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                  \t\t\t\t">65 &#40;53-70&nbsp;\t\t\t\t\t\t\n
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                  \t\t\t\t\ttable-entry\n
                  \t\t\t\t  " align="left" valign="\n
                  \t\t\t\t\ttop\n
                  \t\t\t\t">0&#44;65&nbsp;\t\t\t\t\t\t\n
                  \t\t\t\t</td></tr><tr title="table-row"><td class="td-with-role" title="\n
                  \t\t\t\t\ttable-entry\n
                  \t\t\t\t ; entry_with_role_rowhead " align="left" valign="\n
                  \t\t\t\t\ttop\n
                  \t\t\t\t"><span class="elsevierStyleHsp" style=""></span><span class="elsevierStyleItalic">Sexo masculino&#44; n &#40;&#37;&#41;</span>&nbsp;\t\t\t\t\t\t\n
                  \t\t\t\t</td><td class="td" title="\n
                  \t\t\t\t\ttable-entry\n
                  \t\t\t\t  " align="left" valign="\n
                  \t\t\t\t\ttop\n
                  \t\t\t\t">79 &#40;71&#37;&#41;&nbsp;\t\t\t\t\t\t\n
                  \t\t\t\t</td><td class="td" title="\n
                  \t\t\t\t\ttable-entry\n
                  \t\t\t\t  " align="left" valign="\n
                  \t\t\t\t\ttop\n
                  \t\t\t\t">67 &#40;70&#37;&#41;&nbsp;\t\t\t\t\t\t\n
                  \t\t\t\t</td><td class="td" title="\n
                  \t\t\t\t\ttable-entry\n
                  \t\t\t\t  " align="left" valign="\n
                  \t\t\t\t\ttop\n
                  \t\t\t\t">47 &#40;72&#37;&#41;&nbsp;\t\t\t\t\t\t\n
                  \t\t\t\t</td><td class="td" title="\n
                  \t\t\t\t\ttable-entry\n
                  \t\t\t\t  " align="left" valign="\n
                  \t\t\t\t\ttop\n
                  \t\t\t\t">0&#44;97&nbsp;\t\t\t\t\t\t\n
                  \t\t\t\t</td></tr><tr title="table-row"><td class="td-with-role" title="\n
                  \t\t\t\t\ttable-entry\n
                  \t\t\t\t ; entry_with_role_rowhead " align="left" valign="\n
                  \t\t\t\t\ttop\n
                  \t\t\t\t"><span class="elsevierStyleHsp" style=""></span><span class="elsevierStyleItalic">Estado vacunaci&#243;n&#58;</span><span class="elsevierStyleHsp" style=""></span><span class="elsevierStyleHsp" style=""></span>Completa&#44; n &#40;&#37;&#41;<span class="elsevierStyleHsp" style=""></span><span class="elsevierStyleHsp" style=""></span>Incompleta&#44; n &#40;&#37;&#41;<span class="elsevierStyleHsp" style=""></span><span class="elsevierStyleHsp" style=""></span>No vacunados&#44; n &#40;&#37;&#41;&nbsp;\t\t\t\t\t\t\n
                  \t\t\t\t</td><td class="td" title="\n
                  \t\t\t\t\ttable-entry\n
                  \t\t\t\t  " align="left" valign="\n
                  \t\t\t\t\ttop\n
                  \t\t\t\t">4 &#40;4&#37;&#41;11 &#40;10&#37;&#41;96 &#40;86&#37;&#41;&nbsp;\t\t\t\t\t\t\n
                  \t\t\t\t</td><td class="td" title="\n
                  \t\t\t\t\ttable-entry\n
                  \t\t\t\t  " align="left" valign="\n
                  \t\t\t\t\ttop\n
                  \t\t\t\t">1 &#40;1&#37;&#41;9 &#40;9&#37;&#41;85 &#40;89&#37;&#41;&nbsp;\t\t\t\t\t\t\n
                  \t\t\t\t</td><td class="td" title="\n
                  \t\t\t\t\ttable-entry\n
                  \t\t\t\t  " align="left" valign="\n
                  \t\t\t\t\ttop\n
                  \t\t\t\t">1 &#40;1&#37;&#41;4 &#40;6&#37;&#41;60 &#40;92&#37;&#41;&nbsp;\t\t\t\t\t\t\n
                  \t\t\t\t</td><td class="td" title="\n
                  \t\t\t\t\ttable-entry\n
                  \t\t\t\t  " align="left" valign="\n
                  \t\t\t\t\ttop\n
                  \t\t\t\t">0&#44;63&nbsp;\t\t\t\t\t\t\n
                  \t\t\t\t</td></tr><tr title="table-row"><td class="td-with-role" title="\n
                  \t\t\t\t\ttable-entry\n
                  \t\t\t\t ; entry_with_role_rowhead " align="left" valign="\n
                  \t\t\t\t\ttop\n
                  \t\t\t\t"><span class="elsevierStyleHsp" style=""></span><span class="elsevierStyleItalic">HTA&#44; n &#40;&#37;&#41;</span>&nbsp;\t\t\t\t\t\t\n
                  \t\t\t\t</td><td class="td" title="\n
                  \t\t\t\t\ttable-entry\n
                  \t\t\t\t  " align="left" valign="\n
                  \t\t\t\t\ttop\n
                  \t\t\t\t">58 &#40;52&#37;&#41;&nbsp;\t\t\t\t\t\t\n
                  \t\t\t\t</td><td class="td" title="\n
                  \t\t\t\t\ttable-entry\n
                  \t\t\t\t  " align="left" valign="\n
                  \t\t\t\t\ttop\n
                  \t\t\t\t">42 &#40;44&#37;&#41;&nbsp;\t\t\t\t\t\t\n
                  \t\t\t\t</td><td class="td" title="\n
                  \t\t\t\t\ttable-entry\n
                  \t\t\t\t  " align="left" valign="\n
                  \t\t\t\t\ttop\n
                  \t\t\t\t">26 &#40;40&#37;&#41;&nbsp;\t\t\t\t\t\t\n
                  \t\t\t\t</td><td class="td" title="\n
                  \t\t\t\t\ttable-entry\n
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                  \t\t\t\t">0&#44;25&nbsp;\t\t\t\t\t\t\n
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                  \t\t\t\t"><span class="elsevierStyleHsp" style=""></span><span class="elsevierStyleItalic">Obesidad&#44; n &#40;&#37;&#41;</span>&nbsp;\t\t\t\t\t\t\n
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                  \t\t\t\t">24 &#40;22&#37;&#41;&nbsp;\t\t\t\t\t\t\n
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                  \t\t\t\t">18 &#40;19&#37;&#41;&nbsp;\t\t\t\t\t\t\n
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                  \t\t\t\t">10 &#40;15&#37;&#41;&nbsp;\t\t\t\t\t\t\n
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                  \t\t\t\t"><span class="elsevierStyleHsp" style=""></span><span class="elsevierStyleItalic">Diab&#233;tico&#44; n &#40;&#37;&#41;</span>&nbsp;\t\t\t\t\t\t\n
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                  \t\t\t\t">19 &#40;17&#37;&#41;&nbsp;\t\t\t\t\t\t\n
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                  \t\t\t\t">19 &#40;20&#37;&#41;&nbsp;\t\t\t\t\t\t\n
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                  \t\t\t\t">14 &#40;21&#37;&#41;&nbsp;\t\t\t\t\t\t\n
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                  \t\t\t\t">0&#44;75&nbsp;\t\t\t\t\t\t\n
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                  \t\t\t\t"><span class="elsevierStyleHsp" style=""></span><span class="elsevierStyleItalic">Dislipemia&#44; n &#40;&#37;&#41;</span>&nbsp;\t\t\t\t\t\t\n
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                  \t\t\t\t">39 &#40;35&#37;&#41;&nbsp;\t\t\t\t\t\t\n
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                  \t\t\t\t">21 &#40;22&#37;&#41;&nbsp;\t\t\t\t\t\t\n
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                  \t\t\t\t">19 &#40;29&#37;&#41;&nbsp;\t\t\t\t\t\t\n
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                  \t\t\t\t">0&#44;12&nbsp;\t\t\t\t\t\t\n
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                  \t\t\t\t"><span class="elsevierStyleHsp" style=""></span><span class="elsevierStyleItalic">Fumador&#44; n &#40;&#37;&#41;</span>&nbsp;\t\t\t\t\t\t\n
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                  \t\t\t\t">45 &#40;40&#37;&#41;&nbsp;\t\t\t\t\t\t\n
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                  \t\t\t\t">30 &#40;31&#37;&#41;&nbsp;\t\t\t\t\t\t\n
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                  \t\t\t\t">22 &#40;34&#37;&#41;&nbsp;\t\t\t\t\t\t\n
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                  \t\t\t\t">0&#44;38&nbsp;\t\t\t\t\t\t\n
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                  \t\t\t\t"><span class="elsevierStyleHsp" style=""></span><span class="elsevierStyleItalic">Consumo OH&#44; n &#40;&#37;&#41;</span>&nbsp;\t\t\t\t\t\t\n
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                  \t\t\t\t"><span class="elsevierStyleHsp" style=""></span><span class="elsevierStyleItalic">IRC&#44; n &#40;&#37;&#41;</span>&nbsp;\t\t\t\t\t\t\n
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                  \t\t\t\t">10 &#40;9&#37;&#41;&nbsp;\t\t\t\t\t\t\n
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                  \t\t\t\t">5 &#40;5&#37;&#41;&nbsp;\t\t\t\t\t\t\n
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                  \t\t\t\t">0 &#40;0&#37;&#41;&nbsp;\t\t\t\t\t\t\n
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                  \t\t\t\t"><span class="elsevierStyleHsp" style=""></span><span class="elsevierStyleItalic">SOFA&#44; mediana &#40;p25-p75&#41;</span>&nbsp;\t\t\t\t\t\t\n
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                  \t\t\t\t">5 &#40;4-6&#41;&nbsp;\t\t\t\t\t\t\n
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                  \t\t\t\t">5 &#40;4-6&#41;&nbsp;\t\t\t\t\t\t\n
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                  \t\t\t\t">5 &#40;4-6&#41;&nbsp;\t\t\t\t\t\t\n
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                  \t\t\t\t"><span class="elsevierStyleBold">Biomarcadores analizados</span></td></tr><tr title="table-row"><td class="td-with-role" title="\n
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                  \t\t\t\t"><span class="elsevierStyleHsp" style=""></span><span class="elsevierStyleItalic">CK &#40;mediana p27-75&#41;</span>&nbsp;\t\t\t\t\t\t\n
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                  \t\t\t\t">125 &#40;55-261&#41;&nbsp;\t\t\t\t\t\t\n
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                  \t\t\t\t">110 &#40;52-318&#41;&nbsp;\t\t\t\t\t\t\n
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                  \t\t\t\t">221 &#40;71-371&#41;&nbsp;\t\t\t\t\t\t\n
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                  \t\t\t\t">0&#44;23&nbsp;\t\t\t\t\t\t\n
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                  \t\t\t\t"><span class="elsevierStyleHsp" style=""></span><span class="elsevierStyleItalic">D&#237;mero D&#44; &#40;mediana p27-75&#41;</span>&nbsp;\t\t\t\t\t\t\n
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                  \t\t\t\t">926 &#40;583-2149&#41;&nbsp;\t\t\t\t\t\t\n
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                  \t\t\t\t">980 &#40;646-1773&#41;&nbsp;\t\t\t\t\t\t\n
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                  \t\t\t\t">991 &#40;555-3621&#41;&nbsp;\t\t\t\t\t\t\n
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                  \t\t\t\t">0&#44;94&nbsp;\t\t\t\t\t\t\n
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                  \t\t\t\t"><span class="elsevierStyleHsp" style=""></span><span class="elsevierStyleItalic">Ferritina &#40;mediana p27-75&#41;</span>&nbsp;\t\t\t\t\t\t\n
                  \t\t\t\t</td><td class="td" title="\n
                  \t\t\t\t\ttable-entry\n
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                  \t\t\t\t">803 &#40;461-1370&#41;&nbsp;\t\t\t\t\t\t\n
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                  \t\t\t\t">1&#46;004 &#40;485-1428&#41;&nbsp;\t\t\t\t\t\t\n
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                  \t\t\t\t">994 &#40;617&#46;25-1526&#41;&nbsp;\t\t\t\t\t\t\n
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                  \t\t\t\t">0&#44;55&nbsp;\t\t\t\t\t\t\n
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                  \t\t\t\t"><span class="elsevierStyleHsp" style=""></span><span class="elsevierStyleItalic">IL-6 &#40;mediana p27-75&#41;</span>&nbsp;\t\t\t\t\t\t\n
                  \t\t\t\t</td><td class="td" title="\n
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                  \t\t\t\t">103 &#40;35-135&#41;&nbsp;\t\t\t\t\t\t\n
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                  \t\t\t\t">69 &#40;17-135&#41;&nbsp;\t\t\t\t\t\t\n
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                  \t\t\t\t">65 &#40;31-108&#41;&nbsp;\t\t\t\t\t\t\n
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                  \t\t\t\t">0&#44;18&nbsp;\t\t\t\t\t\t\n
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                  \t\t\t\t ; entry_with_role_rowhead " align="left" valign="\n
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                  \t\t\t\t"><span class="elsevierStyleHsp" style=""></span><span class="elsevierStyleItalic">PCR&#44; media &#40;DE&#41;</span>&nbsp;\t\t\t\t\t\t\n
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                  \t\t\t\t">16 &#40;7-22&#41;&nbsp;\t\t\t\t\t\t\n
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                  \t\t\t\t">10 &#40;5-18&#41;&nbsp;\t\t\t\t\t\t\n
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                  \t\t\t\t">13 &#40;8-24&#41;&nbsp;\t\t\t\t\t\t\n
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                  \t\t\t\t">0&#44;02&nbsp;\t\t\t\t\t\t\n
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                  \t\t\t\t ; entry_with_role_rowhead " align="left" valign="\n
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                  \t\t\t\t"><span class="elsevierStyleHsp" style=""></span><span class="elsevierStyleItalic">Troponina &#40;mediana p25-75&#41;</span>&nbsp;\t\t\t\t\t\t\n
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                  \t\t\t\t">18 &#40;6-48&#41;&nbsp;\t\t\t\t\t\t\n
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                  \t\t\t\t  " align="left" valign="\n
                  \t\t\t\t\ttop\n
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                  \t\t\t\t  " colspan="5" align="left" valign="\n
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                  \t\t\t\t"><span class="elsevierStyleHsp" style=""></span><span class="elsevierStyleItalic">P&#47;F ingreso en UCI&#44; mmHg&#44; mediana &#40;p25-75&#41;</span>&nbsp;\t\t\t\t\t\t\n
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                  \t\t\t\t\ttable-entry\n
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                  \t\t\t\t\ttable-entry\n
                  \t\t\t\t  " align="center" valign="\n
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                  \t\t\t\t">&#60;<span class="elsevierStyleHsp" style=""></span>0&#44;05&nbsp;\t\t\t\t\t\t\n
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                  \t\t\t\t\ttable-entry\n
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                  \t\t\t\t\ttable-entry\n
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                  \t\t\t\t\ttable-entry\n
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                  \t\t\t\t\ttable-entry\n
                  \t\t\t\t  " align="center" valign="\n
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                  \t\t\t\t\ttable-entry\n
                  \t\t\t\t  " align="center" valign="\n
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                  \t\t\t\t">0&#44;02&nbsp;\t\t\t\t\t\t\n
                  \t\t\t\t</td></tr><tr title="table-row"><td class="td-with-role" title="\n
                  \t\t\t\t\ttable-entry\n
                  \t\t\t\t ; entry_with_role_rowhead " align="left" valign="\n
                  \t\t\t\t\ttop\n
                  \t\t\t\t"><span class="elsevierStyleHsp" style=""></span><span class="elsevierStyleItalic">P&#47;F previo a VM&#44; mmHg&#44; mediana &#40;p25-75&#41;</span>&nbsp;\t\t\t\t\t\t\n
                  \t\t\t\t</td><td class="td" title="\n
                  \t\t\t\t\ttable-entry\n
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                  \t\t\t\t</td><td class="td" title="\n
                  \t\t\t\t\ttable-entry\n
                  \t\t\t\t  " align="center" valign="\n
                  \t\t\t\t\ttop\n
                  \t\t\t\t">105 &#40;87-135&#41;&nbsp;\t\t\t\t\t\t\n
                  \t\t\t\t</td><td class="td" title="\n
                  \t\t\t\t\ttable-entry\n
                  \t\t\t\t  " align="center" valign="\n
                  \t\t\t\t\ttop\n
                  \t\t\t\t">100 &#40;80-130&#41;&nbsp;\t\t\t\t\t\t\n
                  \t\t\t\t</td><td class="td" title="\n
                  \t\t\t\t\ttable-entry\n
                  \t\t\t\t  " align="center" valign="\n
                  \t\t\t\t\ttop\n
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                  \t\t\t\t</td></tr><tr title="table-row"><td class="td-with-role" title="\n
                  \t\t\t\t\ttable-entry\n
                  \t\t\t\t ; entry_with_role_rowhead " align="left" valign="\n
                  \t\t\t\t\ttop\n
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                  \t\t\t\t\ttable-entry\n
                  \t\t\t\t  " align="center" valign="\n
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                  \t\t\t\t\ttable-entry\n
                  \t\t\t\t  " align="center" valign="\n
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                  \t\t\t\t</td><td class="td" title="\n
                  \t\t\t\t\ttable-entry\n
                  \t\t\t\t  " align="center" valign="\n
                  \t\t\t\t\ttop\n
                  \t\t\t\t">1 &#40;1-2&#41;&nbsp;\t\t\t\t\t\t\n
                  \t\t\t\t</td><td class="td" title="\n
                  \t\t\t\t\ttable-entry\n
                  \t\t\t\t  " align="center" valign="\n
                  \t\t\t\t\ttop\n
                  \t\t\t\t">0&#44;25&nbsp;\t\t\t\t\t\t\n
                  \t\t\t\t</td></tr><tr title="table-row"><td class="td-with-role" title="\n
                  \t\t\t\t\ttable-entry\n
                  \t\t\t\t ; entry_with_role_rowhead " align="left" valign="\n
                  \t\t\t\t\ttop\n
                  \t\t\t\t"><span class="elsevierStyleHsp" style=""></span><span class="elsevierStyleItalic">P&#47;F previa a PDP&#44; mediana &#40;p25-75&#41;</span>&nbsp;\t\t\t\t\t\t\n
                  \t\t\t\t</td><td class="td" title="\n
                  \t\t\t\t\ttable-entry\n
                  \t\t\t\t  " align="center" valign="\n
                  \t\t\t\t\ttop\n
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                  \t\t\t\t</td><td class="td" title="\n
                  \t\t\t\t\ttable-entry\n
                  \t\t\t\t  " align="center" valign="\n
                  \t\t\t\t\ttop\n
                  \t\t\t\t">120 &#40;100-150&#41;&nbsp;\t\t\t\t\t\t\n
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                  \t\t\t\t\ttable-entry\n
                  \t\t\t\t  " align="center" valign="\n
                  \t\t\t\t\ttop\n
                  \t\t\t\t">127 &#40;103-150&nbsp;\t\t\t\t\t\t\n
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                  \t\t\t\t\ttable-entry\n
                  \t\t\t\t  " align="center" valign="\n
                  \t\t\t\t\ttop\n
                  \t\t\t\t">0&#44;73&nbsp;\t\t\t\t\t\t\n
                  \t\t\t\t</td></tr><tr title="table-row"><td class="td-with-role" title="\n
                  \t\t\t\t\ttable-entry\n
                  \t\t\t\t ; entry_with_role_rowhead " align="left" valign="\n
                  \t\t\t\t\ttop\n
                  \t\t\t\t"><span class="elsevierStyleHsp" style=""></span><span class="elsevierStyleItalic">Duraci&#243;n &#40;horas&#41; PDP&#44; mediana &#40;p25-75&#41;</span>&nbsp;\t\t\t\t\t\t\n
                  \t\t\t\t</td><td class="td" title="\n
                  \t\t\t\t\ttable-entry\n
                  \t\t\t\t  " align="center" valign="\n
                  \t\t\t\t\ttop\n
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                  \t\t\t\t</td><td class="td" title="\n
                  \t\t\t\t\ttable-entry\n
                  \t\t\t\t  " align="center" valign="\n
                  \t\t\t\t\ttop\n
                  \t\t\t\t">19 &#40;18-20&#41;&nbsp;\t\t\t\t\t\t\n
                  \t\t\t\t</td><td class="td" title="\n
                  \t\t\t\t\ttable-entry\n
                  \t\t\t\t  " align="center" valign="\n
                  \t\t\t\t\ttop\n
                  \t\t\t\t">22 &#40;21-24&#41;&nbsp;\t\t\t\t\t\t\n
                  \t\t\t\t</td><td class="td" title="\n
                  \t\t\t\t\ttable-entry\n
                  \t\t\t\t  " align="center" valign="\n
                  \t\t\t\t\ttop\n
                  \t\t\t\t">&#60;<span class="elsevierStyleHsp" style=""></span>0&#44;05&nbsp;\t\t\t\t\t\t\n
                  \t\t\t\t</td></tr><tr title="table-row"><td class="td-with-role" title="\n
                  \t\t\t\t\ttable-entry\n
                  \t\t\t\t ; entry_with_role_rowhead " align="left" valign="\n
                  \t\t\t\t\ttop\n
                  \t\t\t\t"><span class="elsevierStyleHsp" style=""></span><span class="elsevierStyleItalic">Prono temprano&#44; n &#40;&#37;&#41;</span>&nbsp;\t\t\t\t\t\t\n
                  \t\t\t\t</td><td class="td" title="\n
                  \t\t\t\t\ttable-entry\n
                  \t\t\t\t  " align="center" valign="\n
                  \t\t\t\t\ttop\n
                  \t\t\t\t">78 &#40;70&#37;&#41;&nbsp;\t\t\t\t\t\t\n
                  \t\t\t\t</td><td class="td" title="\n
                  \t\t\t\t\ttable-entry\n
                  \t\t\t\t  " align="center" valign="\n
                  \t\t\t\t\ttop\n
                  \t\t\t\t">59 &#40;62&#37;&#41;&nbsp;\t\t\t\t\t\t\n
                  \t\t\t\t</td><td class="td" title="\n
                  \t\t\t\t\ttable-entry\n
                  \t\t\t\t  " align="center" valign="\n
                  \t\t\t\t\ttop\n
                  \t\t\t\t">46 &#40;70&#37;&#41;&nbsp;\t\t\t\t\t\t\n
                  \t\t\t\t</td><td class="td" title="\n
                  \t\t\t\t\ttable-entry\n
                  \t\t\t\t  " align="center" valign="\n
                  \t\t\t\t\ttop\n
                  \t\t\t\t">0&#44;37&nbsp;\t\t\t\t\t\t\n
                  \t\t\t\t</td></tr><tr title="table-row"><td class="td-with-role" title="\n
                  \t\t\t\t\ttable-entry\n
                  \t\t\t\t ; entry_with_role_rowhead " align="left" valign="\n
                  \t\t\t\t\ttop\n
                  \t\t\t\t"><span class="elsevierStyleHsp" style=""></span><span class="elsevierStyleItalic">N&#250;mero sesiones PDP&#44; mediana &#40;p25-75&#41;</span>&nbsp;\t\t\t\t\t\t\n
                  \t\t\t\t</td><td class="td" title="\n
                  \t\t\t\t\ttable-entry\n
                  \t\t\t\t  " align="center" valign="\n
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                  \t\t\t\t">2 &#40;1-4&#41;&nbsp;\t\t\t\t\t\t\n
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                  \t\t\t\t  " align="center" valign="\n
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                  \t\t\t\t">2 &#40;1-4&#41;&nbsp;\t\t\t\t\t\t\n
                  \t\t\t\t</td><td class="td" title="\n
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                  \t\t\t\t  " align="center" valign="\n
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                  \t\t\t\t">2 &#40;1-4&#41;&nbsp;\t\t\t\t\t\t\n
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                  \t\t\t\t  " align="center" valign="\n
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                  \t\t\t\t">0&#44;95&nbsp;\t\t\t\t\t\t\n
                  \t\t\t\t</td></tr><tr title="table-row"><td class="td-with-role" title="\n
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                  \t\t\t\t ; entry_with_role_rowhead " align="left" valign="\n
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                  \t\t\t\t"><span class="elsevierStyleHsp" style=""></span><span class="elsevierStyleItalic">Recuento sesiones PDP&#44; n &#40;&#37;&#41;</span>&nbsp;\t\t\t\t\t\t\n
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                  \t\t\t\t">&nbsp;\t\t\t\t\t\t\n
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                  \t\t\t\t  " align="" valign="\n
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                  \t\t\t\t">&nbsp;\t\t\t\t\t\t\n
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                  \t\t\t\t\ttable-entry\n
                  \t\t\t\t  " align="center" valign="\n
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                  \t\t\t\t">0&#44;11&nbsp;\t\t\t\t\t\t\n
                  \t\t\t\t</td></tr><tr title="table-row"><td class="td-with-role" title="\n
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                  \t\t\t\t ; entry_with_role_rowhead " align="left" valign="\n
                  \t\t\t\t\ttop\n
                  \t\t\t\t"><span class="elsevierStyleHsp" style=""></span><span class="elsevierStyleHsp" style=""></span>Sesi&#243;n &#250;nica&nbsp;\t\t\t\t\t\t\n
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                  \t\t\t\t  " align="center" valign="\n
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                  \t\t\t\t">38 &#40;34&#37;&#41;&nbsp;\t\t\t\t\t\t\n
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                  \t\t\t\t  " align="center" valign="\n
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                  \t\t\t\t">33 &#40;35&#37;&#41;&nbsp;\t\t\t\t\t\t\n
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                  \t\t\t\t  " align="center" valign="\n
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                  \t\t\t\t">18 &#40;28&#37;&#41;&nbsp;\t\t\t\t\t\t\n
                  \t\t\t\t</td><td class="td" title="\n
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                  \t\t\t\t  " align="" valign="\n
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                  \t\t\t\t">&nbsp;\t\t\t\t\t\t\n
                  \t\t\t\t</td></tr><tr title="table-row"><td class="td-with-role" title="\n
                  \t\t\t\t\ttable-entry\n
                  \t\t\t\t ; entry_with_role_rowhead " align="left" valign="\n
                  \t\t\t\t\ttop\n
                  \t\t\t\t"><span class="elsevierStyleHsp" style=""></span><span class="elsevierStyleHsp" style=""></span>2-5 sesiones&nbsp;\t\t\t\t\t\t\n
                  \t\t\t\t</td><td class="td" title="\n
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                  \t\t\t\t  " align="center" valign="\n
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                  \t\t\t\t">56 &#40;50&#37;&#41;&nbsp;\t\t\t\t\t\t\n
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                  \t\t\t\t  " align="center" valign="\n
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                  \t\t\t\t">52 &#40;55&#37;&#41;&nbsp;\t\t\t\t\t\t\n
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                  \t\t\t\t  " align="center" valign="\n
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                  \t\t\t\t">38 &#40;58&#37;&#41;&nbsp;\t\t\t\t\t\t\n
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                  \t\t\t\t  " align="" valign="\n
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                  \t\t\t\t">&nbsp;\t\t\t\t\t\t\n
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                  \t\t\t\t ; entry_with_role_rowhead " align="left" valign="\n
                  \t\t\t\t\ttop\n
                  \t\t\t\t"><span class="elsevierStyleHsp" style=""></span><span class="elsevierStyleHsp" style=""></span>&#62; 5 sesiones&nbsp;\t\t\t\t\t\t\n
                  \t\t\t\t</td><td class="td" title="\n
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                  \t\t\t\t  " align="center" valign="\n
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                  \t\t\t\t">17 &#40;15&#37;&#41;&nbsp;\t\t\t\t\t\t\n
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                  \t\t\t\t  " align="center" valign="\n
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                  \t\t\t\t">10 &#40;10&#37;&#41;&nbsp;\t\t\t\t\t\t\n
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                  \t\t\t\t  " align="center" valign="\n
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                  \t\t\t\t">9 &#40;14&#37;&#41;&nbsp;\t\t\t\t\t\t\n
                  \t\t\t\t</td><td class="td" title="\n
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                  \t\t\t\t  " align="" valign="\n
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                  \t\t\t\t\ttable-entry\n
                  \t\t\t\t  " colspan="5" align="left" valign="\n
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                  \t\t\t\t"><span class="elsevierStyleVsp" style="height:0.5px"></span></td></tr><tr title="table-row"><td class="td" title="\n
                  \t\t\t\t\ttable-entry\n
                  \t\t\t\t  " colspan="5" align="left" valign="\n
                  \t\t\t\t\ttop\n
                  \t\t\t\t"><span class="elsevierStyleBold">Par&#225;metros ventilatorios iniciales</span></td></tr><tr title="table-row"><td class="td-with-role" title="\n
                  \t\t\t\t\ttable-entry\n
                  \t\t\t\t ; entry_with_role_rowhead " align="left" valign="\n
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                  \t\t\t\t"><span class="elsevierStyleHsp" style=""></span><span class="elsevierStyleItalic">Volumen corriente &#40;ml&#41;&#44; mediana &#40;p25-75&#41;</span>&nbsp;\t\t\t\t\t\t\n
                  \t\t\t\t</td><td class="td" title="\n
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                  \t\t\t\t  " align="center" valign="\n
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                  \t\t\t\t">470 &#40;450-485&#41;&nbsp;\t\t\t\t\t\t\n
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                  \t\t\t\t  " align="center" valign="\n
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                  \t\t\t\t">475 &#40;450-490&#41;&nbsp;\t\t\t\t\t\t\n
                  \t\t\t\t</td><td class="td" title="\n
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                  \t\t\t\t  " align="center" valign="\n
                  \t\t\t\t\ttop\n
                  \t\t\t\t">480 &#40;450-500&#41;&nbsp;\t\t\t\t\t\t\n
                  \t\t\t\t</td><td class="td" title="\n
                  \t\t\t\t\ttable-entry\n
                  \t\t\t\t  " align="center" valign="\n
                  \t\t\t\t\ttop\n
                  \t\t\t\t">0&#44;55&nbsp;\t\t\t\t\t\t\n
                  \t\t\t\t</td></tr><tr title="table-row"><td class="td-with-role" title="\n
                  \t\t\t\t\ttable-entry\n
                  \t\t\t\t ; entry_with_role_rowhead " align="left" valign="\n
                  \t\t\t\t\ttop\n
                  \t\t\t\t"><span class="elsevierStyleHsp" style=""></span><span class="elsevierStyleItalic">FR &#40;rpm&#41;&#44; mediana &#40;p25-75&#41;</span>&nbsp;\t\t\t\t\t\t\n
                  \t\t\t\t</td><td class="td" title="\n
                  \t\t\t\t\ttable-entry\n
                  \t\t\t\t  " align="center" valign="\n
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                  \t\t\t\t">18 &#40;16-20&#41;&nbsp;\t\t\t\t\t\t\n
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                  \t\t\t\t  " align="center" valign="\n
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                  \t\t\t\t">18 &#40;16-18&#41;&nbsp;\t\t\t\t\t\t\n
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                  \t\t\t\t  " align="center" valign="\n
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                  \t\t\t\t">18 &#40;16-20&#41;&nbsp;\t\t\t\t\t\t\n
                  \t\t\t\t</td><td class="td" title="\n
                  \t\t\t\t\ttable-entry\n
                  \t\t\t\t  " align="center" valign="\n
                  \t\t\t\t\ttop\n
                  \t\t\t\t">0&#44;65&nbsp;\t\t\t\t\t\t\n
                  \t\t\t\t</td></tr><tr title="table-row"><td class="td-with-role" title="\n
                  \t\t\t\t\ttable-entry\n
                  \t\t\t\t ; entry_with_role_rowhead " align="left" valign="\n
                  \t\t\t\t\ttop\n
                  \t\t\t\t"><span class="elsevierStyleHsp" style=""></span><span class="elsevierStyleItalic">PEEP&#44; cmH</span><span class="elsevierStyleInf"><span class="elsevierStyleItalic">2</span></span><span class="elsevierStyleItalic">O&#44; mediana &#40;p25-75&#41;</span>&nbsp;\t\t\t\t\t\t\n
                  \t\t\t\t</td><td class="td" title="\n
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                  \t\t\t\t  " align="center" valign="\n
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                  \t\t\t\t">10 &#40;10-12&#41;&nbsp;\t\t\t\t\t\t\n
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                  \t\t\t\t  " align="center" valign="\n
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                  \t\t\t\t">10 &#40;8-12&#41;&nbsp;\t\t\t\t\t\t\n
                  \t\t\t\t</td><td class="td" title="\n
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                  \t\t\t\t  " align="center" valign="\n
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                  \t\t\t\t">12 &#40;10-13&#41;&nbsp;\t\t\t\t\t\t\n
                  \t\t\t\t</td><td class="td" title="\n
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                  \t\t\t\t  " align="center" valign="\n
                  \t\t\t\t\ttop\n
                  \t\t\t\t">0&#44;24&nbsp;\t\t\t\t\t\t\n
                  \t\t\t\t</td></tr><tr title="table-row"><td class="td-with-role" title="\n
                  \t\t\t\t\ttable-entry\n
                  \t\t\t\t ; entry_with_role_rowhead " align="left" valign="\n
                  \t\t\t\t\ttop\n
                  \t\t\t\t"><span class="elsevierStyleHsp" style=""></span><span class="elsevierStyleItalic">P plateau&#44; cmH</span><span class="elsevierStyleInf"><span class="elsevierStyleItalic">2</span></span><span class="elsevierStyleItalic">O&#44; mediana &#40;p25-75&#41;</span>&nbsp;\t\t\t\t\t\t\n
                  \t\t\t\t</td><td class="td" title="\n
                  \t\t\t\t\ttable-entry\n
                  \t\t\t\t  " align="center" valign="\n
                  \t\t\t\t\ttop\n
                  \t\t\t\t">22 &#40;20-26&#41;&nbsp;\t\t\t\t\t\t\n
                  \t\t\t\t</td><td class="td" title="\n
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                  \t\t\t\t  " align="center" valign="\n
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                  \t\t\t\t">23 &#40;21-25&#41;&nbsp;\t\t\t\t\t\t\n
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                  \t\t\t\t  " align="center" valign="\n
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                  \t\t\t\t">22 &#40;21-25&#41;&nbsp;\t\t\t\t\t\t\n
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                  \t\t\t\t  " align="center" valign="\n
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                  \t\t\t\t">0&#44;69&nbsp;\t\t\t\t\t\t\n
                  \t\t\t\t</td></tr><tr title="table-row"><td class="td-with-role" title="\n
                  \t\t\t\t\ttable-entry\n
                  \t\t\t\t ; entry_with_role_rowhead " align="left" valign="\n
                  \t\t\t\t\ttop\n
                  \t\t\t\t"><span class="elsevierStyleHsp" style=""></span><span class="elsevierStyleItalic">DP&#44; cmH</span><span class="elsevierStyleInf"><span class="elsevierStyleItalic">2</span></span><span class="elsevierStyleItalic">O&#44; mediana &#40;p25-75&#41;</span>&nbsp;\t\t\t\t\t\t\n
                  \t\t\t\t</td><td class="td" title="\n
                  \t\t\t\t\ttable-entry\n
                  \t\t\t\t  " align="center" valign="\n
                  \t\t\t\t\ttop\n
                  \t\t\t\t">10 &#40;9-14&#41;&nbsp;\t\t\t\t\t\t\n
                  \t\t\t\t</td><td class="td" title="\n
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                  \t\t\t\t  " align="center" valign="\n
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                  \t\t\t\t">11 &#40;9-14&#41;&nbsp;\t\t\t\t\t\t\n
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                  \t\t\t\t  " align="center" valign="\n
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                  \t\t\t\t">11 &#40;8-14&#41;&nbsp;\t\t\t\t\t\t\n
                  \t\t\t\t</td><td class="td" title="\n
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                  \t\t\t\t  " align="center" valign="\n
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                  \t\t\t\t">0&#44;74&nbsp;\t\t\t\t\t\t\n
                  \t\t\t\t</td></tr><tr title="table-row"><td class="td-with-role" title="\n
                  \t\t\t\t\ttable-entry\n
                  \t\t\t\t ; entry_with_role_rowhead " align="left" valign="\n
                  \t\t\t\t\ttop\n
                  \t\t\t\t"><span class="elsevierStyleHsp" style=""></span><span class="elsevierStyleItalic">Mechanical Power&#44; J&#47;min&#44; mediana &#40;p25-75&#41;</span>&nbsp;\t\t\t\t\t\t\n
                  \t\t\t\t</td><td class="td" title="\n
                  \t\t\t\t\ttable-entry\n
                  \t\t\t\t  " align="center" valign="\n
                  \t\t\t\t\ttop\n
                  \t\t\t\t">17 &#40;15-21&#41;&nbsp;\t\t\t\t\t\t\n
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                  \t\t\t\t  " align="center" valign="\n
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                  \t\t\t\t">18 &#40;14-20&#41;&nbsp;\t\t\t\t\t\t\n
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                  \t\t\t\t">18 &#40;16-20&#41;&nbsp;\t\t\t\t\t\t\n
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                  \t\t\t\t  " align="center" valign="\n
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                  \t\t\t\t">0&#44;44&nbsp;\t\t\t\t\t\t\n
                  \t\t\t\t</td></tr><tr title="table-row"><td class="td" title="\n
                  \t\t\t\t\ttable-entry\n
                  \t\t\t\t  " colspan="5" align="left" valign="\n
                  \t\t\t\t\ttop\n
                  \t\t\t\t"><span class="elsevierStyleVsp" style="height:0.5px"></span></td></tr><tr title="table-row"><td class="td" title="\n
                  \t\t\t\t\ttable-entry\n
                  \t\t\t\t  " colspan="5" align="left" valign="\n
                  \t\t\t\t\ttop\n
                  \t\t\t\t"><span class="elsevierStyleBold">Terapias empleadas frente SARS-CoV-2</span></td></tr><tr title="table-row"><td class="td-with-role" title="\n
                  \t\t\t\t\ttable-entry\n
                  \t\t\t\t ; entry_with_role_rowhead " align="left" valign="\n
                  \t\t\t\t\ttop\n
                  \t\t\t\t"><span class="elsevierStyleHsp" style=""></span><span class="elsevierStyleItalic">Empleo de remdesivir&#44; n &#40;&#37;&#41;</span>&nbsp;\t\t\t\t\t\t\n
                  \t\t\t\t</td><td class="td" title="\n
                  \t\t\t\t\ttable-entry\n
                  \t\t\t\t  " align="center" valign="\n
                  \t\t\t\t\ttop\n
                  \t\t\t\t">9 &#40;8&#37;&#41;&nbsp;\t\t\t\t\t\t\n
                  \t\t\t\t</td><td class="td" title="\n
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                  \t\t\t\t  " align="center" valign="\n
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                  \t\t\t\t">12 &#40;13&#37;&#41;&nbsp;\t\t\t\t\t\t\n
                  \t\t\t\t</td><td class="td" title="\n
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                  \t\t\t\t  " align="center" valign="\n
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                  \t\t\t\t">6 &#40;9&#37;&#41;&nbsp;\t\t\t\t\t\t\n
                  \t\t\t\t</td><td class="td" title="\n
                  \t\t\t\t\ttable-entry\n
                  \t\t\t\t  " align="center" valign="\n
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                  \t\t\t\t">0&#44;54&nbsp;\t\t\t\t\t\t\n
                  \t\t\t\t</td></tr><tr title="table-row"><td class="td-with-role" title="\n
                  \t\t\t\t\ttable-entry\n
                  \t\t\t\t ; entry_with_role_rowhead " align="left" valign="\n
                  \t\t\t\t\ttop\n
                  \t\t\t\t"><span class="elsevierStyleHsp" style=""></span><span class="elsevierStyleItalic">Empleo de corticoides&#44; n &#40;&#37;&#41;</span>&nbsp;\t\t\t\t\t\t\n
                  \t\t\t\t</td><td class="td" title="\n
                  \t\t\t\t\ttable-entry\n
                  \t\t\t\t  " align="center" valign="\n
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                  \t\t\t\t">92 &#40;83&#37;&#41;&nbsp;\t\t\t\t\t\t\n
                  \t\t\t\t</td><td class="td" title="\n
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                  \t\t\t\t  " align="center" valign="\n
                  \t\t\t\t\ttop\n
                  \t\t\t\t">84 &#40;88&#37;&#41;&nbsp;\t\t\t\t\t\t\n
                  \t\t\t\t</td><td class="td" title="\n
                  \t\t\t\t\ttable-entry\n
                  \t\t\t\t  " align="center" valign="\n
                  \t\t\t\t\ttop\n
                  \t\t\t\t">57 &#40;88&#37;&#41;&nbsp;\t\t\t\t\t\t\n
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                  \t\t\t\t"><span class="elsevierStyleHsp" style=""></span><span class="elsevierStyleItalic">Empleo de tocilizumab&#44; n &#40;&#37;&#41;</span>&nbsp;\t\t\t\t\t\t\n
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                  \t\t\t\t\ttable-entry\n
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                  \t\t\t\t</td><td class="td" title="\n
                  \t\t\t\t\ttable-entry\n
                  \t\t\t\t  " align="center" valign="\n
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                  \t\t\t\t  " align="center" valign="\n
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                  \t\t\t\t">18 &#40;28&#37;&#41;&nbsp;\t\t\t\t\t\t\n
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                  \t\t\t\t\ttable-entry\n
                  \t\t\t\t  " align="center" valign="\n
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                  \t\t\t\t">0&#44;99&nbsp;\t\t\t\t\t\t\n
                  \t\t\t\t</td></tr><tr title="table-row"><td class="td-with-role" title="\n
                  \t\t\t\t\ttable-entry\n
                  \t\t\t\t ; entry_with_role_rowhead " align="left" valign="\n
                  \t\t\t\t\ttop\n
                  \t\t\t\t"><span class="elsevierStyleHsp" style=""></span><span class="elsevierStyleItalic">Empleo de plasma&#44; n &#40;&#37;&#41;</span>&nbsp;\t\t\t\t\t\t\n
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                  \t\t\t\t\ttable-entry\n
                  \t\t\t\t  " align="center" valign="\n
                  \t\t\t\t\ttop\n
                  \t\t\t\t">32 &#40;29&#37;&#41;&nbsp;\t\t\t\t\t\t\n
                  \t\t\t\t</td><td class="td" title="\n
                  \t\t\t\t\ttable-entry\n
                  \t\t\t\t  " align="center" valign="\n
                  \t\t\t\t\ttop\n
                  \t\t\t\t">28 &#40;29&#37;&#41;&nbsp;\t\t\t\t\t\t\n
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                  \t\t\t\t\ttable-entry\n
                  \t\t\t\t  " align="center" valign="\n
                  \t\t\t\t\ttop\n
                  \t\t\t\t">16 &#40;25&#37;&#41;&nbsp;\t\t\t\t\t\t\n
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                  \t\t\t\t\ttable-entry\n
                  \t\t\t\t  " align="center" valign="\n
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                  \t\t\t\t</td></tr><tr title="table-row"><td class="td" title="\n
                  \t\t\t\t\ttable-entry\n
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                  \t\t\t\t"><span class="elsevierStyleVsp" style="height:0.5px"></span></td></tr><tr title="table-row"><td class="td" title="\n
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                  \t\t\t\t  " colspan="5" align="left" valign="\n
                  \t\t\t\t\ttop\n
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                  \t\t\t\t\ttable-entry\n
                  \t\t\t\t ; entry_with_role_rowhead " align="left" valign="\n
                  \t\t\t\t\ttop\n
                  \t\t\t\t"><span class="elsevierStyleHsp" style=""></span><span class="elsevierStyleItalic">Empleo de f&#225;rmacos vasoactivos&#44; n &#40;&#37;&#41;</span>&nbsp;\t\t\t\t\t\t\n
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                  \t\t\t\t\ttable-entry\n
                  \t\t\t\t  " align="center" valign="\n
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                  \t\t\t\t\ttable-entry\n
                  \t\t\t\t  " align="center" valign="\n
                  \t\t\t\t\ttop\n
                  \t\t\t\t">56 &#40;59&#37;&#41;&nbsp;\t\t\t\t\t\t\n
                  \t\t\t\t</td><td class="td" title="\n
                  \t\t\t\t\ttable-entry\n
                  \t\t\t\t  " align="center" valign="\n
                  \t\t\t\t\ttop\n
                  \t\t\t\t">36 &#40;55&#37;&#41;&nbsp;\t\t\t\t\t\t\n
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                  \t\t\t\t\ttable-entry\n
                  \t\t\t\t  " align="center" valign="\n
                  \t\t\t\t\ttop\n
                  \t\t\t\t">0&#44;51&nbsp;\t\t\t\t\t\t\n
                  \t\t\t\t</td></tr><tr title="table-row"><td class="td-with-role" title="\n
                  \t\t\t\t\ttable-entry\n
                  \t\t\t\t ; entry_with_role_rowhead " align="left" valign="\n
                  \t\t\t\t\ttop\n
                  \t\t\t\t"><span class="elsevierStyleHsp" style=""></span><span class="elsevierStyleItalic">Empleo de TRRC&#44; n &#40;&#37;&#41;</span>&nbsp;\t\t\t\t\t\t\n
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                  \t\t\t\t\ttable-entry\n
                  \t\t\t\t  " align="center" valign="\n
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                  \t\t\t\t\ttable-entry\n
                  \t\t\t\t  " align="center" valign="\n
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                  \t\t\t\t">5 &#40;5&#37;&#41;&nbsp;\t\t\t\t\t\t\n
                  \t\t\t\t</td><td class="td" title="\n
                  \t\t\t\t\ttable-entry\n
                  \t\t\t\t  " align="center" valign="\n
                  \t\t\t\t\ttop\n
                  \t\t\t\t">5 &#40;8&#37;&#41;&nbsp;\t\t\t\t\t\t\n
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                  \t\t\t\t\ttable-entry\n
                  \t\t\t\t  " align="center" valign="\n
                  \t\t\t\t\ttop\n
                  \t\t\t\t">0&#44;97&nbsp;\t\t\t\t\t\t\n
                  \t\t\t\t</td></tr><tr title="table-row"><td class="td-with-role" title="\n
                  \t\t\t\t\ttable-entry\n
                  \t\t\t\t ; entry_with_role_rowhead " align="left" valign="\n
                  \t\t\t\t\ttop\n
                  \t\t\t\t"><span class="elsevierStyleHsp" style=""></span><span class="elsevierStyleItalic">Empleo de ECMO&#44; n &#40;&#37;&#41;</span>&nbsp;\t\t\t\t\t\t\n
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                  \t\t\t\t\ttable-entry\n
                  \t\t\t\t  " align="center" valign="\n
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                  \t\t\t\t">5 &#40;4&#37;&#41;&nbsp;\t\t\t\t\t\t\n
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                  \t\t\t\t">1 &#40;1&#37;&#41;&nbsp;\t\t\t\t\t\t\n
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                  \t\t\t\t  " align="center" valign="\n
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                  \t\t\t\t">0 &#40;0&#37;&#41;&nbsp;\t\t\t\t\t\t\n
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                  \t\t\t\t  " align="center" valign="\n
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                  \t\t\t\t\ttable-entry\n
                  \t\t\t\t ; entry_with_role_rowhead " align="left" valign="\n
                  \t\t\t\t\ttop\n
                  \t\t\t\t"><span class="elsevierStyleHsp" style=""></span><span class="elsevierStyleItalic">Empleo de iNO&#44; n &#40;&#37;&#41;</span>&nbsp;\t\t\t\t\t\t\n
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                  \t\t\t\t\ttable-entry\n
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                  \t\t\t\t\ttable-entry\n
                  \t\t\t\t  " align="center" valign="\n
                  \t\t\t\t\ttop\n
                  \t\t\t\t">8 &#40;12&#37;&#41;&nbsp;\t\t\t\t\t\t\n
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                  \t\t\t\t\ttable-entry\n
                  \t\t\t\t  " align="center" valign="\n
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                  \t\t\t\t">0&#44;67&nbsp;\t\t\t\t\t\t\n
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          "es" => "<p id="spar0115" class="elsevierStyleSimplePara elsevierViewall">An&#225;lisis comparativo entre terciles de tiempo &#40;horas&#41; del primer prono&#44; de las principales variables asociadas a la insuficiencia respiratoria aguda y acciones terap&#233;uticas en UCI</p>"
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          "leyenda" => "<p id="spar0130" class="elsevierStyleSimplePara elsevierViewall">NAVM&#47;TAVM&#58; neumon&#237;a asociada a ventilaci&#243;n mec&#225;nica&#47;traqueobronquitis asociada ventilaci&#243;n mec&#225;nica&#59; TEP&#58; tromboembolismo pulmonar&#59; UCI&#58; unidad de cuidados intensivos&#59; VM&#58; ventilaci&#243;n mec&#225;nica&#46;</p>"
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                  \t\t\t\t" scope="col" style="border-bottom: 2px solid black">&nbsp;\t\t\t\t\t\t\n
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                  \t\t\t\t" scope="col" style="border-bottom: 2px solid black">Primer tercil14 horas&#40;IC<span class="elsevierStyleHsp" style=""></span>95&#37;&#58; 10-16&#41;n<span class="elsevierStyleHsp" style=""></span>&#61;<span class="elsevierStyleHsp" style=""></span>111&nbsp;\t\t\t\t\t\t\n
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                  \t\t\t\t" scope="col" style="border-bottom: 2px solid black">Segundo tercil19 horas&#40;IC<span class="elsevierStyleHsp" style=""></span>95&#37;&#58; 18-20&#41;n<span class="elsevierStyleHsp" style=""></span>&#61;<span class="elsevierStyleHsp" style=""></span>95&nbsp;\t\t\t\t\t\t\n
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                  \t\t\t\t  " align="left" valign="\n
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                  \t\t\t\t" scope="col" style="border-bottom: 2px solid black">Tercer tercil22 horas&#40;IC<span class="elsevierStyleHsp" style=""></span>95&#37;&#58; 21-24&#41;n<span class="elsevierStyleHsp" style=""></span>&#61;<span class="elsevierStyleHsp" style=""></span>65&nbsp;\t\t\t\t\t\t\n
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                  \t\t\t\t" scope="col" style="border-bottom: 2px solid black">p&nbsp;\t\t\t\t\t\t\n
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                  \t\t\t\t">D&#237;as de VM&#44; mediana &#40;p25-p75&#41;&nbsp;\t\t\t\t\t\t\n
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                  \t\t\t\t  " align="left" valign="\n
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                  \t\t\t\t">13 &#40;8-25&#41;&nbsp;\t\t\t\t\t\t\n
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                  \t\t\t\t  " align="left" valign="\n
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                  \t\t\t\t">12 &#40;8-19&#41;&nbsp;\t\t\t\t\t\t\n
                  \t\t\t\t</td><td class="td" title="\n
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                  \t\t\t\t  " align="left" valign="\n
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                  \t\t\t\t">0&#44;74&nbsp;\t\t\t\t\t\t\n
                  \t\t\t\t</td></tr><tr title="table-row"><td class="td-with-role" title="\n
                  \t\t\t\t\ttable-entry\n
                  \t\t\t\t ; entry_with_role_rowhead " align="left" valign="\n
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                  \t\t\t\t">Estancia en UCI &#40;d&#237;as&#41;&#44; mediana &#40;p25-p75&#41;&nbsp;\t\t\t\t\t\t\n
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                  \t\t\t\t">17 &#40;10-27&#41;&nbsp;\t\t\t\t\t\t\n
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                  \t\t\t\t  " align="left" valign="\n
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                  \t\t\t\t">17 &#40;10-30&#41;&nbsp;\t\t\t\t\t\t\n
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                  \t\t\t\t\ttable-entry\n
                  \t\t\t\t  " align="left" valign="\n
                  \t\t\t\t\ttop\n
                  \t\t\t\t">15 &#40;10-27&#41;&nbsp;\t\t\t\t\t\t\n
                  \t\t\t\t</td><td class="td" title="\n
                  \t\t\t\t\ttable-entry\n
                  \t\t\t\t  " align="left" valign="\n
                  \t\t\t\t\ttop\n
                  \t\t\t\t">0&#44;88&nbsp;\t\t\t\t\t\t\n
                  \t\t\t\t</td></tr><tr title="table-row"><td class="td-with-role" title="\n
                  \t\t\t\t\ttable-entry\n
                  \t\t\t\t ; entry_with_role_rowhead " align="left" valign="\n
                  \t\t\t\t\ttop\n
                  \t\t\t\t">Diagn&#243;stico de NAVM&#47;TAVM&#44; n &#40;&#37;&#41;&nbsp;\t\t\t\t\t\t\n
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                  \t\t\t\t\ttable-entry\n
                  \t\t\t\t  " align="left" valign="\n
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                  \t\t\t\t  " align="left" valign="\n
                  \t\t\t\t\ttop\n
                  \t\t\t\t">61 &#40;64&#37;&#41;&nbsp;\t\t\t\t\t\t\n
                  \t\t\t\t</td><td class="td" title="\n
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                  \t\t\t\t">30 &#40;46&#37;&#41;&nbsp;\t\t\t\t\t\t\n
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                  \t\t\t\t\ttable-entry\n
                  \t\t\t\t  " align="left" valign="\n
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                  \t\t\t\t">0&#44;08&nbsp;\t\t\t\t\t\t\n
                  \t\t\t\t</td></tr><tr title="table-row"><td class="td-with-role" title="\n
                  \t\t\t\t\ttable-entry\n
                  \t\t\t\t ; entry_with_role_rowhead " align="left" valign="\n
                  \t\t\t\t\ttop\n
                  \t\t\t\t">Diagn&#243;stico de TEP masivo&#44; n &#40;&#37;&#41;&nbsp;\t\t\t\t\t\t\n
                  \t\t\t\t</td><td class="td" title="\n
                  \t\t\t\t\ttable-entry\n
                  \t\t\t\t  " align="left" valign="\n
                  \t\t\t\t\ttop\n
                  \t\t\t\t">7 &#40;6&#37;&#41;&nbsp;\t\t\t\t\t\t\n
                  \t\t\t\t</td><td class="td" title="\n
                  \t\t\t\t\ttable-entry\n
                  \t\t\t\t  " align="left" valign="\n
                  \t\t\t\t\ttop\n
                  \t\t\t\t">4 &#40;4&#37;&#41;&nbsp;\t\t\t\t\t\t\n
                  \t\t\t\t</td><td class="td" title="\n
                  \t\t\t\t\ttable-entry\n
                  \t\t\t\t  " align="left" valign="\n
                  \t\t\t\t\ttop\n
                  \t\t\t\t">3 &#40;5&#37;&#41;&nbsp;\t\t\t\t\t\t\n
                  \t\t\t\t</td><td class="td" title="\n
                  \t\t\t\t\ttable-entry\n
                  \t\t\t\t  " align="left" valign="\n
                  \t\t\t\t\ttop\n
                  \t\t\t\t">0&#44;77&nbsp;\t\t\t\t\t\t\n
                  \t\t\t\t</td></tr><tr title="table-row"><td class="td-with-role" title="\n
                  \t\t\t\t\ttable-entry\n
                  \t\t\t\t ; entry_with_role_rowhead " align="left" valign="\n
                  \t\t\t\t\ttop\n
                  \t\t\t\t">Necesidad de traqueostom&#237;a&#44; n &#40;&#37;&#41;&nbsp;\t\t\t\t\t\t\n
                  \t\t\t\t</td><td class="td" title="\n
                  \t\t\t\t\ttable-entry\n
                  \t\t\t\t  " align="left" valign="\n
                  \t\t\t\t\ttop\n
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Duración de la primera maniobra de decúbito prono y su asociación con la mortalidad a 90 días en pacientes con insuficiencia respiratoria aguda por COVID-19: un estudio retrospectivo de terciles de tiempo
Duration of the first prone positioning maneuver and its association with 90-day mortality in patients with acute respiratory failure due to COVID-19: A retrospective study of time terciles
Alejandro González-Castroa,b, Carmen Huertas Martína, Elena Cuenca Fitoa, Yhivian Peñascoa, Camilo Gonzaleza, Juan Carlos Rodríguez Borregána,
Autor para correspondencia
jrodriguez.borregan@scsalud.es

Autor para correspondencia.
a Servicio de Medicina Intensiva, Hospital Universitario Marqués de Valdecilla, Santander, España
b Grupo Internacional de Ventilación Mecánica, WeVent
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y a pesar de su amplia adopci&#243;n en la pr&#225;ctica cl&#237;nica&#44; la duraci&#243;n &#243;ptima de la primera sesi&#243;n PDP en pacientes con C-ARDS a&#250;n no ha sido claramente definida&#46; Esta falta de consenso se suma a la escasez de evidencia sobre los efectos espec&#237;ficos de la duraci&#243;n inicial de la maniobra de dec&#250;bito prono en los resultados cl&#237;nicos a largo plazo<a class="elsevierStyleCrossRefs" href="#bib0180"><span class="elsevierStyleSup">6-9</span></a>&#46;</p><p id="par0015" class="elsevierStylePara elsevierViewall">En este contexto se plantea la hip&#243;tesis de que la duraci&#243;n de la primera PDP puede influir significativamente en la mortalidad a medio plazo en pacientes con C-ARDS&#46; Se postula que una duraci&#243;n &#243;ptima de la primera sesi&#243;n de PDP podr&#237;a correlacionarse con una mejora en la oxigenaci&#243;n y en el alivio del estr&#233;s pulmonar&#44; favoreciendo una recuperaci&#243;n pulmonar m&#225;s efectiva y una reducci&#243;n en la aparici&#243;n de complicaciones respiratorias graves&#44; y por tanto una disminuci&#243;n en la mortalidad<a class="elsevierStyleCrossRefs" href="#bib0200"><span class="elsevierStyleSup">10-14</span></a>&#46;</p><p id="par0020" class="elsevierStylePara elsevierViewall">El presente estudio tiene como objetivo investigar la asociaci&#243;n entre la duraci&#243;n de la primera PDP y la mortalidad a 90<span class="elsevierStyleHsp" style=""></span>d&#237;as en pacientes con C-ARDS&#46; Para ello&#44; se dividi&#243; a los pacientes en terciles de tiempo de duraci&#243;n de la primera maniobra de PDP y se analizar&#225;n los desenlaces cl&#237;nicos&#44; con un enfoque particular en la mortalidad a 90<span class="elsevierStyleHsp" style=""></span>d&#237;as&#46;</p></span><span id="sec0010" class="elsevierStyleSection elsevierViewall"><span class="elsevierStyleSectionTitle" id="sect0110">Material y m&#233;todos</span><p id="par0025" class="elsevierStylePara elsevierViewall">Estudio retrospectivo&#44; observacional y anal&#237;tico en el que fueron incluidos los enfermos adultos que hab&#237;an ingresado en &#225;rea-COVID del servicio de medicina intensiva con diagn&#243;stico confirmado de infecci&#243;n por SARS-CoV-2 mediante reacci&#243;n en cadena de la polimerasa &#40;PCR&#41; en c&#233;lulas del tracto respiratorio&#44; entre marzo de 2020 y marzo de 2022&#46; Los datos fueron recopilados del registro de la cohorte de pacientes con COVID-19 en un servicio de medicina intensiva de un hospital de tercer nivel&#46; Este registro se llev&#243; a cabo tras obtener la aprobaci&#243;n del Comit&#233; de &#201;tica en Investigaci&#243;n local &#40;c&#243;digo de referencia local 2020&#46;250&#41; y obtener el consentimiento informado de los pacientes o de sus representantes legales &#8212;de forma escrita y&#47;o telef&#243;nica&#8212; para introducir sus datos en el mismo&#46; Posteriormente&#44; algunos datos que no fueron inicialmente recopilados se completaron de manera retrospectiva&#46;</p><p id="par0030" class="elsevierStylePara elsevierViewall">Fueron criterios de inclusi&#243;n&#58; ser mayor de 18<span class="elsevierStyleHsp" style=""></span>a&#241;os&#44; diagn&#243;stico confirmado de enfermedad por de SARS-CoV-2 en las primeras 24<span class="elsevierStyleHsp" style=""></span>horas de ingreso hospitalario&#44; necesidad de ingreso en la unidad de cuidados intensivos &#40;UCI&#41; por insuficiencia respiratoria&#44; recibir tratamiento con ventilaci&#243;n mec&#225;nica &#40;VM&#41; por dicha causa y haber necesitado maniobra PDP como parte del tratamiento de su insuficiencia respiratoria&#46; Fueron criterios de exclusi&#243;n los registros con errores en las recogidas de las variables de an&#225;lisis y el empleo de PDP en paciente despierto&#46;</p><p id="par0035" class="elsevierStylePara elsevierViewall">El detalle de las variables registradas se muestra en el <a class="elsevierStyleCrossRef" href="#sec0040">material suplementario</a>&#46;</p><p id="par0040" class="elsevierStylePara elsevierViewall">Los enfermos fueron categorizados en terciles&#44; seg&#250;n duraci&#243;n en horas de la primera maniobra de PDP&#46; La indicaci&#243;n de PDP&#44; as&#237; como el cese de la maniobra&#44; se realizaron seg&#250;n el criterio del m&#233;dico responsable&#44; basado en las recomendaciones para el manejo de los pacientes cr&#237;ticos con COVID-19 en las UCI de la Sociedad Espa&#241;ola de Medicina Intensiva y Unidades Coronarias &#40;SEMICYUC&#41;&#44; donde se propon&#237;a una duraci&#243;n en la maniobra de PDP de al menos 16<span class="elsevierStyleHsp" style=""></span>horas<a class="elsevierStyleCrossRef" href="#bib0225"><span class="elsevierStyleSup">15</span></a>&#46; Se definieron como PDP temprano aquellos que fueron posicionados en dec&#250;bito PDP dentro de las 24<span class="elsevierStyleHsp" style=""></span>horas siguientes a su ingreso&#46;</p><p id="par0045" class="elsevierStylePara elsevierViewall">Se realiz&#243; el seguimiento de los pacientes durante 90<span class="elsevierStyleHsp" style=""></span>d&#237;as desde el momento del ingreso en la UCI o hasta su fallecimiento &#40;el hecho que se produjese primero&#41;&#46;</p><p id="par0050" class="elsevierStylePara elsevierViewall">Se realiz&#243; inicialmente un an&#225;lisis descriptivo de la muestra donde las variables categ&#243;ricas se presentan como el valor y su porcentaje&#59; y como mediana y sus percentiles 25-75 &#40;p25-75&#41; para las variables cuantitativas continuas&#46; Las comparaciones de porcentajes entre los grupos se realizaron mediante tablas de contingencia y chi cuadrado&#59; para el an&#225;lisis de las variables continuas se utiliz&#243; la prueba de Kruskal Wallis&#46;</p><p id="par0055" class="elsevierStylePara elsevierViewall">Posteriormente se llev&#243; a cabo un an&#225;lisis multivariable de la supervivencia ajustando un modelo de regresi&#243;n de Cox &#40;m&#233;todo&#58; Fordward&#59; introducci&#243;n de variables al modelo si p<span class="elsevierStyleHsp" style=""></span>&#60;<span class="elsevierStyleHsp" style=""></span>0&#44;05 y exclusi&#243;n de variables si p<span class="elsevierStyleHsp" style=""></span>&#62;<span class="elsevierStyleHsp" style=""></span>0&#44;2&#59; estado&#58; fallecimiento a los 90<span class="elsevierStyleHsp" style=""></span>d&#237;as&#59; se seleccionan las variables independientes con p<span class="elsevierStyleHsp" style=""></span>&#60;<span class="elsevierStyleHsp" style=""></span>0&#44;2 en el an&#225;lisis bivariante&#41;&#46; La medida de asociaci&#243;n se expresa mediante el uso del hazard ratio &#40;HR&#41; acompa&#241;ado de su respectivo intervalo de confianza al 95&#37; &#40;IC<span class="elsevierStyleHsp" style=""></span>95&#37;&#41;&#46; Se emple&#243; el valor del &#237;ndice de concordancia de Harrell como medida de concordancia en el modelo de regresi&#243;n de Cox&#46; Para todos los an&#225;lisis&#44; la significaci&#243;n estad&#237;stica se estableci&#243; en p<span class="elsevierStyleHsp" style=""></span>&#60;<span class="elsevierStyleHsp" style=""></span>0&#44;05&#46;</p><p id="par0060" class="elsevierStylePara elsevierViewall">Se efectu&#243; un an&#225;lisis de supervivencia a 90<span class="elsevierStyleHsp" style=""></span>d&#237;as con el m&#233;todo de Kaplan-Meier para la variable de tiempo de muerte &#40;Log-rank test&#41;&#46;</p></span><span id="sec0015" class="elsevierStyleSection elsevierViewall"><span class="elsevierStyleSectionTitle" id="sect0115">Resultados</span><p id="par0065" class="elsevierStylePara elsevierViewall">Durante el periodo analizado ingresaron un total de 911 enfermos en la UCI-COVID&#46; Con un total de 894 enfermos analizados &#40;<a class="elsevierStyleCrossRef" href="#tbl0005">tabla 1</a>&#41;&#44; se observa una distribuci&#243;n a lo largo de las diferentes oleadas de la pandemia&#44; siendo la sexta oleada la que contribuye con la mayor proporci&#243;n &#40;24&#44;5&#37;&#41;&#46; En 300 enfermos &#40;33&#37;&#41; se realiz&#243; alguna maniobra de PDP durante el ingreso en la UCI&#46; Despu&#233;s de depurar los datos se analizaron un total de 271 pacientes sometidos a PDP&#46; Ciento once pacientes &#40;41&#37;&#41; fueron categorizados en el primer tercil de duraci&#243;n &#40;horas&#41; de la primera maniobra de PDP&#44; 95 &#40;35&#37;&#41; en el segundo tercil y 65 &#40;24&#37;&#41; en el tercer tercil &#40;<a class="elsevierStyleCrossRef" href="#fig0005">fig&#46; 1</a>&#41;&#46;</p><elsevierMultimedia ident="tbl0005"></elsevierMultimedia><elsevierMultimedia ident="fig0005"></elsevierMultimedia><p id="par0070" class="elsevierStylePara elsevierViewall">Los resultados indicaron que la mediana de la duraci&#243;n del PDP fue de 14<span class="elsevierStyleHsp" style=""></span>horas &#40;IC<span class="elsevierStyleHsp" style=""></span>95&#37;&#58; 10-16<span class="elsevierStyleHsp" style=""></span>horas&#41; en el primer tercil&#44; 19<span class="elsevierStyleHsp" style=""></span>horas &#40;IC<span class="elsevierStyleHsp" style=""></span>95&#37;&#58; 18-20<span class="elsevierStyleHsp" style=""></span>horas&#41; en el segundo tercil y 22<span class="elsevierStyleHsp" style=""></span>horas &#40;IC<span class="elsevierStyleHsp" style=""></span>95&#37;&#58; 21-24<span class="elsevierStyleHsp" style=""></span>horas&#41; en el tercer tercil&#46;</p><p id="par0075" class="elsevierStylePara elsevierViewall">En el an&#225;lisis comparativo de las caracter&#237;sticas cl&#237;nico-epidemiol&#243;gicas&#44; categorizadas por terciles de tiempo de duraci&#243;n &#40;horas&#41; del primer PDP&#44; resalta la uniformidad en la presentaci&#243;n de casos a lo largo de las oleadas&#44; con ciertas variaciones en biomarcadores y estados de vacunaci&#243;n &#40;<a class="elsevierStyleCrossRef" href="#tbl0010">tabla 2</a>&#41;&#46; La prote&#237;na<span class="elsevierStyleHsp" style=""></span>C reactiva &#40;PCR&#41; mostr&#243; variabilidad media significativa entre los grupos &#40;p<span class="elsevierStyleHsp" style=""></span>&#61;<span class="elsevierStyleHsp" style=""></span>0&#44;02&#41;&#44; y la insuficiencia renal cr&#243;nica &#40;IRC&#41; fue m&#225;s pronunciada en los pacientes categorizados en el primer tercil &#40;p<span class="elsevierStyleHsp" style=""></span>&#61;<span class="elsevierStyleHsp" style=""></span>0&#44;04&#41; &#40;<a class="elsevierStyleCrossRef" href="#tbl0010">tabla 2</a>&#41;&#46;</p><elsevierMultimedia ident="tbl0010"></elsevierMultimedia><p id="par0080" class="elsevierStylePara elsevierViewall">Se evidenciaron diferencias en la presentaci&#243;n cl&#237;nica y en las estrategias terap&#233;uticas seg&#250;n el tercil &#40;<a class="elsevierStyleCrossRef" href="#tbl0015">tabla 3</a>&#41;&#58; la relaci&#243;n P&#47;F al ingreso en la UCI mostr&#243; una significativa variaci&#243;n&#44; siendo m&#225;s baja en el primer tercil &#40;p<span class="elsevierStyleHsp" style=""></span>&#60;<span class="elsevierStyleHsp" style=""></span>0&#44;05&#41;&#59; se observaron patrones diferentes en el empleo de oxigenoterapia de alto flujo &#40;CNAF&#41; en la UCI&#44; con una disminuci&#243;n significativa en su uso en el grupo de pacientes en los que la duraci&#243;n de la primera maniobra de PDP fue mayor &#40;tercer tercil&#41; &#40;p<span class="elsevierStyleHsp" style=""></span>&#61;<span class="elsevierStyleHsp" style=""></span>0&#44;05&#41;&#44; el uso de ECMO mostr&#243; variabilidad&#44; aunque sin alcanzar significaci&#243;n estad&#237;stica &#40;p<span class="elsevierStyleHsp" style=""></span>&#61;<span class="elsevierStyleHsp" style=""></span>0&#44;09&#41;&#46; El n&#250;mero de sesiones de PDP present&#243; una mediana de 2 sesiones y un rango intercuart&#237;lico de 1 a 4 sesiones en todos los grupos&#46; En t&#233;rminos de frecuencia&#44; aproximadamente una tercera parte de los pacientes tuvieron una sola sesi&#243;n de PDP&#46; Las diferencias encontradas en los grupos analizados no alcanzaron significaci&#243;n estad&#237;stica &#40;p<span class="elsevierStyleHsp" style=""></span>&#61;<span class="elsevierStyleHsp" style=""></span>0&#44;11&#41;&#46;</p><elsevierMultimedia ident="tbl0015"></elsevierMultimedia><p id="par0085" class="elsevierStylePara elsevierViewall">En el an&#225;lisis de las principales variables evolutivas entre los grupos &#40;<a class="elsevierStyleCrossRef" href="#tbl0020">tabla 4</a>&#41;&#44; ni en t&#233;rminos de duraci&#243;n VM&#44; ni de estancia en la UCI&#44; se encontraron diferencias significativas &#40;p<span class="elsevierStyleHsp" style=""></span>&#61;<span class="elsevierStyleHsp" style=""></span>0&#44;74 y p<span class="elsevierStyleHsp" style=""></span>&#61;<span class="elsevierStyleHsp" style=""></span>0&#44;88&#44; respectivamente&#41;&#46; En el diagn&#243;stico de traqueobronquitis&#47;neumon&#237;a asociada a ventilaci&#243;n mec&#225;nica &#40;TAVM&#47;NAVM&#41; se observ&#243; una tendencia a ser m&#225;s prevalentes en el segundo tercil &#40;64&#37;&#41; &#40;p<span class="elsevierStyleHsp" style=""></span>&#61;<span class="elsevierStyleHsp" style=""></span>0&#44;08&#41;&#46; Otros desenlaces evaluados&#44; como el diagn&#243;stico de tromboembolismo pulmonar &#40;TEP&#41; masivo y la necesidad de traqueostom&#237;a&#44; no mostraron diferencias sustanciales&#46;</p><elsevierMultimedia ident="tbl0020"></elsevierMultimedia><p id="par0090" class="elsevierStylePara elsevierViewall">El an&#225;lisis de supervivencia reflej&#243;&#44; para el primer tercil&#44; una media de supervivencia de 74<span class="elsevierStyleHsp" style=""></span>d&#237;as&#44; con un error est&#225;ndar &#40;SE&#41; de 2&#44;687 y un IC<span class="elsevierStyleHsp" style=""></span>95&#37; entre 69 y 79 d&#237;as&#46; En el segundo tercil&#44; la media de supervivencia fue ligeramente menor&#44; registrando 71<span class="elsevierStyleHsp" style=""></span>d&#237;as&#44; con un SE de 3&#44;191 y un IC<span class="elsevierStyleHsp" style=""></span>95&#37; entre 64 y 77 d&#237;as&#46; En contraste&#44; el tercer tercil exhibi&#243; la media de supervivencia m&#225;s alta&#44; alcanzando los 80<span class="elsevierStyleHsp" style=""></span>d&#237;as&#44; con un SE de 3&#44;085 y un IC<span class="elsevierStyleHsp" style=""></span>95&#37; entre 74 y 86 d&#237;as&#46; Utilizando la metodolog&#237;a de Kaplan-Meier y realizando la comparaci&#243;n de las curvas de supervivencia mediante la prueba de Logrank&#44; se encontr&#243; que no se alcanz&#243; significaci&#243;n estad&#237;stica &#40;p<span class="elsevierStyleHsp" style=""></span>&#61;<span class="elsevierStyleHsp" style=""></span>0&#44;11&#41;&#46; Sin embargo&#44; se observ&#243; una tendencia hacia una mayor supervivencia en el grupo con una duraci&#243;n de tiempo m&#225;s prolongada en la primera maniobra de PDP&#44; como se muestra en la <a class="elsevierStyleCrossRef" href="#fig0010">figura 2</a>&#46;</p><elsevierMultimedia ident="fig0010"></elsevierMultimedia><p id="par0095" class="elsevierStylePara elsevierViewall">Finalmente&#44; en el an&#225;lisis de regresi&#243;n de Cox para examinar el tiempo de supervivencia&#44; con un enfoque en el seguimiento a 90<span class="elsevierStyleHsp" style=""></span>d&#237;as&#44; el modelo incluy&#243; variables como la edad&#44; donde se observ&#243; que un incremento de un a&#241;o en la edad se asoci&#243; con un aumento del 7&#44;07&#37; en el riesgo de mortalidad a los 90<span class="elsevierStyleHsp" style=""></span>d&#237;as &#40;HR&#58; 1&#44;07&#59; IC<span class="elsevierStyleHsp" style=""></span>95&#37;&#58; 1&#44;03-1&#44;10&#41;&#59; los pacientes que requirieron ECMO presentaron un riesgo 4&#44;42 veces mayor de mortalidad en comparaci&#243;n con aquellos que no la necesitaron &#40;HR&#58; 4&#44;42&#59; IC<span class="elsevierStyleHsp" style=""></span>95&#37;&#58; 1&#44;52-12&#44;82&#41;&#59; el n&#250;mero de sesiones de pronaci&#243;n tambi&#233;n mostr&#243; una asociaci&#243;n significativa con la supervivencia a los 90<span class="elsevierStyleHsp" style=""></span>d&#237;as&#58; los pacientes que recibieron entre 2 y 5 sesiones de pronaci&#243;n tuvieron un riesgo 2&#44;19 veces mayor de mortalidad en comparaci&#243;n con los que recibieron sesi&#243;n &#250;nica &#40;HR&#58; 2&#44;19&#59; IC<span class="elsevierStyleHsp" style=""></span>95&#37;&#58; 1&#44;07-4&#44;49&#41;&#44; y aquellos que recibieron m&#225;s de 5 sesiones de pronaci&#243;n experimentaron un riesgo a&#250;n mayor&#44; con un aumento de 6&#44;05 veces en el riesgo de mortalidad en comparaci&#243;n con el grupo de referencia &#40;HR&#58; 6&#44;05&#59; IC<span class="elsevierStyleHsp" style=""></span>95&#37;&#58; 2&#44;78-13&#44;16&#41;&#59; el valor de P&#47;F al ingreso en la UCI se asoci&#243; de manera significativa con la supervivencia&#58; por cada unidad de aumento en el valor de P&#47;F&#44; se observ&#243; un aumento del 0&#44;68&#37; en la supervivencia a los 90<span class="elsevierStyleHsp" style=""></span>d&#237;as &#40;HR&#58; 1&#44;00&#59; IC<span class="elsevierStyleHsp" style=""></span>95&#37;&#58; 1&#44;00-1&#44;01&#41;&#46; El &#237;ndice de concordancia de Harrell fue de 0&#44;745 &#40;IC<span class="elsevierStyleHsp" style=""></span>95&#37;&#58; 0&#44;68-0&#44;80&#41;&#46; No fueron incluidas en el modelo las variables&#58; sexo&#44; valor de PCR&#44; IL-6&#44; TAVM&#47;NAVM&#44; la IRC&#44; el empleo de CNAF&#44; la duraci&#243;n de CNAF y los diferentes terciles de tiempo de duraci&#243;n del primer PDP&#46;</p></span><span id="sec0020" class="elsevierStyleSection elsevierViewall"><span class="elsevierStyleSectionTitle" id="sect0120">Discusi&#243;n</span><p id="par0100" class="elsevierStylePara elsevierViewall">El trabajo presentado no demuestra de forma estad&#237;sticamente significativa que los pacientes que m&#225;s tiempo estuvieron en PDP en la primera maniobra tuvieron una mayor supervivencia a 90<span class="elsevierStyleHsp" style=""></span>d&#237;as&#59; no obstante&#44; nuestros datos sugieren explorar m&#225;s a fondo el impacto del tiempo de PDP en la evoluci&#243;n cl&#237;nica de los pacientes con C-ARDS&#46; Por otro lado&#44; el n&#250;mero de sesiones de PDP mostr&#243; una asociaci&#243;n significativa con la mortalidad a los 90<span class="elsevierStyleHsp" style=""></span>d&#237;as&#58; los enfermos con una sesi&#243;n &#250;nica de PDP presentaron un menor riesgo de fallecer&#46;</p><p id="par0105" class="elsevierStylePara elsevierViewall">En nuestro an&#225;lisis&#44; a pesar de no haberse identificado diferencias en complicaciones espec&#237;ficas durante el per&#237;odo de estancia en la UCI que justifiquen la diferencia observada en las curvas de supervivencia a partir de la segunda semana de seguimiento&#44; es importante considerar que otros factores no evaluados en el estudio podr&#237;an estar influyendo en la mortalidad de los pacientes&#46; Estos podr&#237;an incluir la presencia de comorbilidades adicionales&#44; el tratamiento posterior a la UCI&#44; la calidad del cuidado proporcionado o las complicaciones a medio plazo no conocidas&#46; Por ejemplo&#44; la modificaci&#243;n de la estructura de trabajo&#44; junto con otros factores&#44; podr&#237;a haber influido de manera arbitraria en el momento en que se decidi&#243; realizar la intubaci&#243;n y comenzar la ventilaci&#243;n mec&#225;nica con estrategias protectoras&#44; as&#237; como en la implementaci&#243;n de maniobras como el dec&#250;bito prono&#46; De hecho&#44; observamos como los pacientes en los que la primera PDP fue mayor&#44; el empleo de CNAF previo a la VM tambi&#233;n fue mayor&#44; pudiendo desencadenar un retraso en la intubaci&#243;n que conocemos puede dar lugar a un peor pron&#243;stico<a class="elsevierStyleCrossRefs" href="#bib0230"><span class="elsevierStyleSup">16&#44;17</span></a>&#46;</p><p id="par0110" class="elsevierStylePara elsevierViewall">La justificaci&#243;n cl&#237;nica para ampliar la duraci&#243;n de las sesiones de PDP se basa en el principal beneficio de esta posici&#243;n&#58; homogeneizar el estr&#233;s y la tensi&#243;n aplicada por la ventilaci&#243;n mec&#225;nica en los pulmones&#46; La PDP promueve una distribuci&#243;n m&#225;s uniforme del volumen de ventilaci&#243;n&#46; Los estudios han demostrado que la PDP puede mejorar la homogeneizaci&#243;n de la presi&#243;n pleural y la reapertura de unidades alveolares posteriores&#46; Desde el punto de vista organizativo&#44; ampliar las sesiones de PP a m&#225;s de 24<span class="elsevierStyleHsp" style=""></span>horas puede reducir significativamente la carga de trabajo&#44; el riesgo de complicaciones asociadas con la rotaci&#243;n frecuente y la exposici&#243;n viral&#46; Adem&#225;s&#44; podr&#237;a aumentar la adherencia a la posici&#243;n prona al concentrar los retornos a la posici&#243;n supina durante el d&#237;a&#44; mejorando as&#237; la seguridad del procedimiento&#46; Sin embargo&#44; ampliar la duraci&#243;n de la PDP no est&#225; exento de riesgos&#58; mayor riesgo de lesiones por presi&#243;n&#44; mayor incidencia de lesiones relacionadas con el cat&#233;ter&#44; interrupci&#243;n de la alimentaci&#243;n enteral&#44; plexopat&#237;as o par&#225;lisis del plexo braquial&#44; entre otras<a class="elsevierStyleCrossRef" href="#bib0240"><span class="elsevierStyleSup">18</span></a>&#46;</p><p id="par0115" class="elsevierStylePara elsevierViewall">En el an&#225;lisis efectuado&#44; la categorizaci&#243;n de los pacientes por terciles se fundamenta en la mayor sensibilidad a las variaciones en los datos &#40;beneficioso para capturar con mayor detalle las diferencias entre los valores&#41;&#44; en la simplificaci&#243;n de la interpretaci&#243;n y la comunicaci&#243;n de los resultados&#44; en su utilidad para analizar o resaltar diferencias en las colas de las distribuciones y en la facilidad de comparaci&#243;n entre grupos terciles&#58; un grupo de duraci&#243;n intermedia&#44; con dos grupos &#40;de mayor y de menor duraci&#243;n&#41; para su comparaci&#243;n<a class="elsevierStyleCrossRef" href="#bib0245"><span class="elsevierStyleSup">19</span></a>&#46;</p><p id="par0120" class="elsevierStylePara elsevierViewall">En primer lugar&#44; es importante destacar que el fracaso de los primeros estudios para demostrar un beneficio en la supervivencia de la PDP en el s&#237;ndrome de distr&#233;s respiratorio agudo &#40;SDRA&#41; se ha atribuido &#40;al margen de la aplicaci&#243;n de ventilaci&#243;n mec&#225;nica protectora&#41; tanto a la duraci&#243;n insuficiente como al inicio tard&#237;o de la misma<a class="elsevierStyleCrossRefs" href="#bib0250"><span class="elsevierStyleSup">20-22</span></a>&#46; Las recomendaciones para el manejo de los pacientes cr&#237;ticos con COVID-19 en las UCI de la Sociedad Espa&#241;ola de Medicina Intensiva y Unidades Coronarias &#40;SEMICYUC&#41; propon&#237;an una duraci&#243;n en la maniobra de PDP de al menos 16<span class="elsevierStyleHsp" style=""></span>horas<a class="elsevierStyleCrossRef" href="#bib0225"><span class="elsevierStyleSup">15</span></a>&#46; Estas recomendaciones se fundamentaban principalmente en el trabajo de Gu&#233;rin et al&#46;<a class="elsevierStyleCrossRef" href="#bib0155"><span class="elsevierStyleSup">1</span></a>&#44; en el cual se evidenci&#243; un descenso notable en la mortalidad del 41&#37; al 23&#44;6&#37; &#40;p<span class="elsevierStyleHsp" style=""></span>&#61;<span class="elsevierStyleHsp" style=""></span>0&#44;001&#41; cuando se aplicaron sesiones &#40;4<span class="elsevierStyleHsp" style=""></span>d&#237;as&#41; de PDP de 17<span class="elsevierStyleHsp" style=""></span>horas en pacientes con un P&#47;F media de 100<span class="elsevierStyleHsp" style=""></span>&#177;<span class="elsevierStyleHsp" style=""></span>30<span class="elsevierStyleHsp" style=""></span>mmHg y ventilaci&#243;n protectora &#40;volumen corriente de 6<span class="elsevierStyleHsp" style=""></span>ml&#47;kg&#41;&#46;</p><p id="par0125" class="elsevierStylePara elsevierViewall">No obstante&#44; durante la pandemia el n&#250;mero de pacientes que requirieron PDP se increment&#243;&#44; y bien por sobrecarga asistencial o por su mayor gravedad&#44; algunos pacientes se mantuvieron en PDP durante periodos m&#225;s prolongados<a class="elsevierStyleCrossRef" href="#bib0240"><span class="elsevierStyleSup">18</span></a>&#58; lo que algunos autores denominan PDP extendida&#46; Sin embargo&#44; la PDP extendida ya hab&#237;a sido descrita pre-pandemia en peque&#241;os estudios pseudo-aleatorizados<a class="elsevierStyleCrossRef" href="#bib0265"><span class="elsevierStyleSup">23</span></a> y estudios monoc&#233;ntricos retrospectivos&#44; donde la heterogeneidad de las muestras&#44; el escaso n&#250;mero de pacientes y las diferentes variaciones en titulaci&#243;n de presi&#243;n positiva al final de la espiraci&#243;n &#40;PEEP&#41;&#44; criterios para la finalizaci&#243;n de sesiones y seguimiento&#44; no permit&#237;an extraer conclusiones en relaci&#243;n con la supervivencia de los pacientes<a class="elsevierStyleCrossRefs" href="#bib0270"><span class="elsevierStyleSup">24-26</span></a>&#46; Aun as&#237;&#44; muchos de estos trabajos reportaban mejoras notables en valores de oxigenaci&#243;n de los pacientes en PDP extendida frente a las maniobras convencionales&#46;</p><p id="par0130" class="elsevierStylePara elsevierViewall">Durante la pandemia&#44; varios centros publicaron su experiencia sobre la implementaci&#243;n de PDP extendida en pacientes C-ARDS en ventilaci&#243;n mec&#225;nica&#46; En los estudios m&#225;s relevantes destacan&#44; por un lado&#44; las estrategias organizativas&#44; como el protocolo de &#171;dos noches&#187; con una duraci&#243;n mediana de PDP de 39<span class="elsevierStyleHsp" style=""></span>horas &#91;rango intercuart&#237;lico de 34-42&#93;&#46; Este protocolo permiti&#243; el aumento en la relaci&#243;n P&#47;F durante la primera sesi&#243;n de PDP que se asoci&#243; con una reducci&#243;n de la mortalidad en la UCI&#46; Por otro lado&#44; se establecieron las estrategias cl&#237;nicas&#58; una vez iniciado el PDP&#44; este se mantiene hasta la mejor&#237;a cl&#237;nica&#46; Se suprime por completo el alternar entre el PDP y la posici&#243;n supina&#46; Esta estrategia fue descrita por primera vez a gran escala para el C-ARDS por Douglas et al&#46;<a class="elsevierStyleCrossRef" href="#bib0285"><span class="elsevierStyleSup">27</span></a>&#46; Las sesiones de PDP se mantuvieron hasta que los pacientes alcanzaron los siguientes criterios&#58; relaci&#243;n P&#47;F &#62;<span class="elsevierStyleHsp" style=""></span>150 con FiO<span class="elsevierStyleInf">2</span> &#62;<span class="elsevierStyleHsp" style=""></span>60&#37; y niveles de PEEP &#60;<span class="elsevierStyleHsp" style=""></span>10<span class="elsevierStyleHsp" style=""></span>cmH<span class="elsevierStyleInf">2</span>O&#46; Este protocolo result&#243; en sesiones de una duraci&#243;n mediana de 2&#44;95<span class="elsevierStyleHsp" style=""></span>d&#237;as entre los sobrevivientes y 3&#44;3<span class="elsevierStyleHsp" style=""></span>d&#237;as entre los no sobrevivientes&#44; con una cuarta parte de las sesiones de los no sobrevivientes que duraron al menos 6&#44;6<span class="elsevierStyleHsp" style=""></span>d&#237;as&#46;</p><p id="par0135" class="elsevierStylePara elsevierViewall">Finalmente&#44; un solo estudio evalu&#243; la asociaci&#243;n causal entre la duraci&#243;n prolongada del PDP cl&#237;nicamente dirigido y la mortalidad<a class="elsevierStyleCrossRef" href="#bib0290"><span class="elsevierStyleSup">28</span></a>&#46; En este estudio retrospectivo multic&#233;ntrico se incluy&#243; un total de 263 pacientes&#46; La duraci&#243;n mediana del PDP en el grupo de duraci&#243;n prolongada fue de 40<span class="elsevierStyleHsp" style=""></span>horas&#44; y la duraci&#243;n m&#225;xima de una sola sesi&#243;n fue mayor de 10<span class="elsevierStyleHsp" style=""></span>d&#237;as&#46; La duraci&#243;n mediana del PDP en el grupo de duraci&#243;n de PDP est&#225;ndar fue de 17<span class="elsevierStyleHsp" style=""></span>horas&#46; En el estudio&#44; los pacientes en el grupo de duraci&#243;n prolongada de la PDP experimentaron una tasa de mortalidad a 3<span class="elsevierStyleHsp" style=""></span>meses m&#225;s baja que los pacientes en el grupo de duraci&#243;n est&#225;ndar &#40;HR&#58; 0&#44;47&#59; IC<span class="elsevierStyleHsp" style=""></span>95&#37;&#58; 0&#44;34-0&#44;67&#59; p<span class="elsevierStyleHsp" style=""></span>&#60;<span class="elsevierStyleHsp" style=""></span>0&#44;001&#41;&#46;</p><p id="par0140" class="elsevierStylePara elsevierViewall">En el estudio exclusivo del primer ciclo de PDP de Gonzalez et al&#46;<a class="elsevierStyleCrossRef" href="#bib0295"><span class="elsevierStyleSup">29</span></a>&#44; donde se analizan las caracter&#237;sticas&#44; los cambios en la oxigenaci&#243;n y la mec&#225;nica pulmonar en pacientes con C-ARDS tratados con PDP&#44; evaluando la respuesta en la primera maniobra&#44; la mortalidad fue significativamente menor en aquellos pacientes cuya oxigenaci&#243;n aument&#243; despu&#233;s de la posici&#243;n prona&#46; Se identificaron como factores independientes asociados con la mortalidad la edad&#44; el aumento porcentual en P&#47;F despu&#233;s de 24<span class="elsevierStyleHsp" style=""></span>horas en PDP y el n&#250;mero de ciclos&#46;</p><p id="par0145" class="elsevierStylePara elsevierViewall">En nuestro medio&#44; en el estudio de De Miguel Balsa et al&#46;<a class="elsevierStyleCrossRef" href="#bib0300"><span class="elsevierStyleSup">30</span></a>&#44; donde el objetivo fue describir las caracter&#237;sticas de los pacientes C-ARDS en ventilaci&#243;n mec&#225;nica invasiva &#40;VMI&#41; y analizar el efecto del dec&#250;bito prono prolongado &#40;&#62;<span class="elsevierStyleHsp" style=""></span>24<span class="elsevierStyleHsp" style=""></span>h&#41; en comparaci&#243;n con el dec&#250;bito prono de menos de 24<span class="elsevierStyleHsp" style=""></span>h&#44; se observ&#243; que el dec&#250;bito prono prolongado se asoci&#243; con una menor tolerancia a la ventilaci&#243;n en dec&#250;bito supino&#44; una mayor estancia hospitalaria&#44; m&#225;s d&#237;as de VMI&#44; una mayor duraci&#243;n del tratamiento con bloqueo neuromuscular y un mayor porcentaje de episodios de obstrucci&#243;n del tubo orotraqueal&#46;</p><p id="par0150" class="elsevierStylePara elsevierViewall">Bas&#225;ndonos en los resultados de nuestro an&#225;lisis y en la revisi&#243;n de la literatura&#44; surge la posibilidad de plantear la hip&#243;tesis de que prolongar la PDP m&#225;s all&#225; de las 16<span class="elsevierStyleHsp" style=""></span>horas&#44; que es la recomendaci&#243;n actual predominante&#44; podr&#237;a ser factible en t&#233;rminos de supervivencia&#46; Sin embargo&#44; a&#250;n queda por determinar qu&#233; enfoque para extender esta duraci&#243;n resulta m&#225;s adecuado&#58; &#191;una duraci&#243;n fija establecida por la organizaci&#243;n asistencial o la aplicaci&#243;n de criterios cl&#237;nicos para determinar el fin de la PDP&#63; Evidentemente&#44; se requieren m&#225;s investigaciones prospectivas e intervencionistas para evaluar estos hallazgos de manera exhaustiva&#46;</p><p id="par0155" class="elsevierStylePara elsevierViewall">Adem&#225;s de las limitaciones propias de un estudio retrospectivo&#44; el presente trabajo presenta la limitaci&#243;n de indicaciones de la PDP basadas en el criterio del m&#233;dico responsable&#44; sin un protocolo fijo y estandarizado&#46; A pesar de ello&#44; no se observaron diferencias significativas en las variables relacionadas con el momento de indicaci&#243;n&#44; lo que sugiere que la variabilidad en la decisi&#243;n m&#233;dica no tuvo un impacto estad&#237;sticamente significativo en los resultados obtenidos&#46; La falta de datos en relaci&#243;n con la oxigenaci&#243;n y la mec&#225;nica pulmonar que justificaron el cese de las maniobras tambi&#233;n limita en parte el estudio&#46; Por otro lado&#44; algunas de las variables no introducidas en el modelo pudieran estar altamente correlacionadas con otras variables predictoras ya incluidas en el modelo&#46; Otra limitaci&#243;n que merece discusi&#243;n es el porcentaje de p&#233;rdidas de pacientes durante el seguimiento&#46; Observamos que aproximadamente el 10&#37; de los pacientes sometidos a pronaci&#243;n &#40;29 de 300&#41; se perdieron durante el estudio&#44; no siendo posible constatar si estas p&#233;rdidas fueron aleatorias o si estuvieron influenciadas por factores espec&#237;ficos&#44; como la gravedad de la enfermedad o el momento particular de la pandemia&#46; La posibilidad de sesgo en la selecci&#243;n de los pacientes perdidos podr&#237;a tener implicaciones en la interpretaci&#243;n de nuestros resultados y en la generalizaci&#243;n de los hallazgos&#46; Adem&#225;s&#44; es relevante discutir el efecto de la imprecisi&#243;n de las estimaciones debido al tama&#241;o muestral&#46; Reconocemos que&#44; dada la naturaleza del estudio y el tama&#241;o de la muestra&#44; puede haber limitaciones en la precisi&#243;n de nuestros resultados&#46; Finalmente&#44; es importante destacar que no fue recogida la justificaci&#243;n de suspensi&#243;n precoz de la primera maniobra PDP&#58; no se puede justificar porque algunos pacientes incluidos en el primer tercil recibieron una duraci&#243;n de PDP insuficiente seg&#250;n el estudio PROSEVA<a class="elsevierStyleCrossRef" href="#bib0155"><span class="elsevierStyleSup">1</span></a>&#46;</p></span><span id="sec0025" class="elsevierStyleSection elsevierViewall"><span class="elsevierStyleSectionTitle" id="sect0125">Financiaci&#243;n</span><p id="par0160" class="elsevierStylePara elsevierViewall">El presente manuscrito no ha recibido financiaci&#243;n alguna&#46;</p></span><span id="sec0030" class="elsevierStyleSection elsevierViewall"><span class="elsevierStyleSectionTitle" id="sect0130">Autor&#237;a</span><p id="par0165" class="elsevierStylePara elsevierViewall">Alejandro Gonz&#225;lez-Castro&#58; ideaci&#243;n&#44; elaboraci&#243;n y redacci&#243;n del manuscrito&#46;</p><p id="par0170" class="elsevierStylePara elsevierViewall">Elena Cuenca Fito&#58; recogida de datos&#46;</p><p id="par0175" class="elsevierStylePara elsevierViewall">Yhivian Pe&#241;asco&#58; elaboraci&#243;n&#44; correcci&#243;n&#46;</p><p id="par0180" class="elsevierStylePara elsevierViewall">Carmen Huertas&#58; depuraci&#243;n de la base de datos&#46;</p><p id="par0185" class="elsevierStylePara elsevierViewall">Camilo Gonzalez&#58; redacci&#243;n&#44; correci&#243;n&#46;</p><p id="par0190" class="elsevierStylePara elsevierViewall">Juan Carlos Rodr&#237;guez Borreg&#225;n&#58; elaboraci&#243;n&#44; correcci&#243;n&#46;</p></span><span id="sec0035" class="elsevierStyleSection elsevierViewall"><span class="elsevierStyleSectionTitle" id="sect0135">Conflicto de intereses</span><p id="par0200" class="elsevierStylePara elsevierViewall">Los autores declaran no tener ning&#250;n conflicto de intereses&#46;</p></span></span>"
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        "resumen" => "<span id="abst0005" class="elsevierStyleSection elsevierViewall"><span class="elsevierStyleSectionTitle" id="sect0010">Objetivo</span><p id="spar0005" class="elsevierStyleSimplePara elsevierViewall">Investigar la asociaci&#243;n entre la duraci&#243;n de la primera maniobra de posici&#243;n en dec&#250;bito prono &#40;PDP&#41; y la mortalidad a 90<span class="elsevierStyleHsp" style=""></span>d&#237;as en pacientes con C-ARDS&#46;</p></span> <span id="abst0010" class="elsevierStyleSection elsevierViewall"><span class="elsevierStyleSectionTitle" id="sect0015">Dise&#241;o</span><p id="spar0010" class="elsevierStyleSimplePara elsevierViewall">Estudio retrospectivo&#44; observacional y anal&#237;tico&#46;</p></span> <span id="abst0015" class="elsevierStyleSection elsevierViewall"><span class="elsevierStyleSectionTitle" id="sect0020">&#193;mbito</span><p id="spar0015" class="elsevierStyleSimplePara elsevierViewall">UCI-COVID de hospital terciario&#46;</p></span> <span id="abst0020" class="elsevierStyleSection elsevierViewall"><span class="elsevierStyleSectionTitle" id="sect0025">Pacientes</span><p id="spar0020" class="elsevierStyleSimplePara elsevierViewall">Mayores de 18 a&#241;os&#44; con diagn&#243;stico confirmado de enfermedad por SARS-CoV-2 que necesitaron de maniobra de PDP&#46;</p></span> <span id="abst0025" class="elsevierStyleSection elsevierViewall"><span class="elsevierStyleSectionTitle" id="sect0030">Intervenciones</span><p id="spar0025" class="elsevierStyleSimplePara elsevierViewall">An&#225;lisis multivariable de supervivencia a 90<span class="elsevierStyleHsp" style=""></span>d&#237;as&#46;</p></span> <span id="abst0030" class="elsevierStyleSection elsevierViewall"><span class="elsevierStyleSectionTitle" id="sect0035">Variables de inter&#233;s principales</span><p id="spar0030" class="elsevierStyleSimplePara elsevierViewall">Duraci&#243;n de la primera PDP&#44; n&#250;mero de sesiones de PDP&#44; mortalidad a 90<span class="elsevierStyleHsp" style=""></span>d&#237;as&#46;</p></span> <span id="abst0035" class="elsevierStyleSection elsevierViewall"><span class="elsevierStyleSectionTitle" id="sect0040">Resultados</span><p id="spar0035" class="elsevierStyleSimplePara elsevierViewall">271 pacientes sometidos a PDP fueron analizados&#58; primer tercil &#40;n<span class="elsevierStyleHsp" style=""></span>&#61;<span class="elsevierStyleHsp" style=""></span>111&#41;&#44; segundo tercil &#40;n<span class="elsevierStyleHsp" style=""></span>&#61;<span class="elsevierStyleHsp" style=""></span>95&#41; y tercer tercil &#40;n<span class="elsevierStyleHsp" style=""></span>&#61;<span class="elsevierStyleHsp" style=""></span>65&#41;&#46; Los resultados indicaron que la mediana de la duraci&#243;n del PDP fue de 14<span class="elsevierStyleHsp" style=""></span>horas &#40;IC<span class="elsevierStyleHsp" style=""></span>95&#37;&#58; 10-16<span class="elsevierStyleHsp" style=""></span>horas&#41; en el primer tercil&#44; 19<span class="elsevierStyleHsp" style=""></span>horas &#40;IC<span class="elsevierStyleHsp" style=""></span>95&#37;&#58; 18-20<span class="elsevierStyleHsp" style=""></span>horas&#41; en el segundo tercil y 22<span class="elsevierStyleHsp" style=""></span>horas &#40;IC<span class="elsevierStyleHsp" style=""></span>95&#37;&#58; 21-24<span class="elsevierStyleHsp" style=""></span>horas&#41; en el tercer tercil&#46; La comparaci&#243;n de las curvas de supervivencia a trav&#233;s de la prueba de Logrank no alcanz&#243; significaci&#243;n estad&#237;stica &#40;p<span class="elsevierStyleHsp" style=""></span>&#61;<span class="elsevierStyleHsp" style=""></span>0&#44;11&#41;&#46; El an&#225;lisis de regresi&#243;n de Cox evidenci&#243; asociaci&#243;n entre el n&#250;mero de sesiones de pronaci&#243;n &#8212;los pacientes que recibieron entre 2 y 5 sesiones &#40;HR&#58; 2&#44;19&#59; IC<span class="elsevierStyleHsp" style=""></span>95&#37;&#58; 1&#44;07-4&#44;49&#41; y aquellos que recibieron m&#225;s de 5 sesiones &#40;HR&#58; 6&#44;05&#59; IC<span class="elsevierStyleHsp" style=""></span>95&#37;&#58; 2&#44;78-13&#44;16&#41;&#8212; y la mortalidad a 90<span class="elsevierStyleHsp" style=""></span>d&#237;as&#46;</p></span> <span id="abst0040" class="elsevierStyleSection elsevierViewall"><span class="elsevierStyleSectionTitle" id="sect0045">Conclusiones</span><p id="spar0040" class="elsevierStyleSimplePara elsevierViewall">Mientras que la duraci&#243;n del PDP no parece influir de forma significativa en la mortalidad a 90<span class="elsevierStyleHsp" style=""></span>d&#237;as&#44; el n&#250;mero de sesiones de pronaci&#243;n se identifica como un factor significativo asociado con un mayor riesgo de mortalidad&#46;</p></span>"
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            "identificador" => "abst0040"
            "titulo" => "Conclusiones"
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      "en" => array:3 [
        "titulo" => "Abstract"
        "resumen" => "<span id="abst0045" class="elsevierStyleSection elsevierViewall"><span class="elsevierStyleSectionTitle" id="sect0055">Objective</span><p id="spar0045" class="elsevierStyleSimplePara elsevierViewall">To investigate the association between the duration of the first prone positioning maneuver &#40;PPM&#41; and 90-day mortality in patients with C-ARDS&#46;</p></span> <span id="abst0050" class="elsevierStyleSection elsevierViewall"><span class="elsevierStyleSectionTitle" id="sect0060">Design</span><p id="spar0050" class="elsevierStyleSimplePara elsevierViewall">Retrospective&#44; observational&#44; and analytical study&#46;</p></span> <span id="abst0055" class="elsevierStyleSection elsevierViewall"><span class="elsevierStyleSectionTitle" id="sect0065">Setting</span><p id="spar0055" class="elsevierStyleSimplePara elsevierViewall">COVID-19 ICU of a tertiary hospital&#46;</p></span> <span id="abst0060" class="elsevierStyleSection elsevierViewall"><span class="elsevierStyleSectionTitle" id="sect0070">Patients</span><p id="spar0060" class="elsevierStyleSimplePara elsevierViewall">Adults over 18<span class="elsevierStyleHsp" style=""></span>years old&#44; with a confirmed diagnosis of SARS-CoV-2 disease requiring PPM&#46;</p></span> <span id="abst0065" class="elsevierStyleSection elsevierViewall"><span class="elsevierStyleSectionTitle" id="sect0075">Interventions</span><p id="spar0065" class="elsevierStyleSimplePara elsevierViewall">Multivariable analysis of 90-day survival&#46;</p></span> <span id="abst0070" class="elsevierStyleSection elsevierViewall"><span class="elsevierStyleSectionTitle" id="sect0080">Main variables of interest</span><p id="spar0070" class="elsevierStyleSimplePara elsevierViewall">Duration of the first PPM&#44; number of PPM sessions&#44; 90-day mortality&#46;</p></span> <span id="abst0075" class="elsevierStyleSection elsevierViewall"><span class="elsevierStyleSectionTitle" id="sect0085">Results</span><p id="spar0075" class="elsevierStyleSimplePara elsevierViewall">271 patients undergoing PPM were analyzed&#58; first tertile &#40;n<span class="elsevierStyleHsp" style=""></span>&#61;<span class="elsevierStyleHsp" style=""></span>111&#41;&#44; second tertile &#40;n<span class="elsevierStyleHsp" style=""></span>&#61;<span class="elsevierStyleHsp" style=""></span>95&#41; and third tertile &#40;n<span class="elsevierStyleHsp" style=""></span>&#61;<span class="elsevierStyleHsp" style=""></span>65&#41;&#46; The results indicated that the median duration of PDP was 14<span class="elsevierStyleHsp" style=""></span>hours &#40;95&#37;<span class="elsevierStyleHsp" style=""></span>CI&#58; 10-16<span class="elsevierStyleHsp" style=""></span>hours&#41; in the first tertile&#44; 19<span class="elsevierStyleHsp" style=""></span>hours &#40;95&#37;<span class="elsevierStyleHsp" style=""></span>CI&#58; 18-20<span class="elsevierStyleHsp" style=""></span>hours&#41; in the second tertile and 22<span class="elsevierStyleHsp" style=""></span>hours &#40;95&#37;<span class="elsevierStyleHsp" style=""></span>CI&#58; 21-24<span class="elsevierStyleHsp" style=""></span>hours&#41; in the third tertile&#46; Comparison of survival curves using the Logrank test did not reach statistical significance &#40;<span class="elsevierStyleItalic">P</span><span class="elsevierStyleHsp" style=""></span>&#61;<span class="elsevierStyleHsp" style=""></span>&#46;11&#41;&#46; Cox Regression analysis showed an association between the number of pronation sessions &#8212; patients receiving between 2 and 5 sessions &#40;HR&#58; 2&#46;19&#59; 95&#37;<span class="elsevierStyleHsp" style=""></span>CI&#58; 1&#46;07-4&#46;49&#41; and those receiving more than 5 sessions &#40;HR&#58; 6&#46;05&#59; 95&#37;<span class="elsevierStyleHsp" style=""></span>CI&#58; 2&#46;78-13&#46;16 &#8212; and 90-day mortality&#46;</p></span> <span id="abst0080" class="elsevierStyleSection elsevierViewall"><span class="elsevierStyleSectionTitle" id="sect0090">Conclusions</span><p id="spar0080" class="elsevierStyleSimplePara elsevierViewall">While the duration of PDP does not appear to significantly influence 90-day mortality&#44; the number of pronation sessions is identified as a significant factor associated with an increased risk of mortality&#46;</p></span>"
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            "identificador" => "abst0045"
            "titulo" => "Objective"
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            "titulo" => "Design"
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            "identificador" => "abst0065"
            "titulo" => "Interventions"
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            "identificador" => "abst0070"
            "titulo" => "Main variables of interest"
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            "titulo" => "Results"
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            "titulo" => "Material adicional"
            "identificador" => "sec0045"
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                  \t\t\t\t"><span class="elsevierStyleHsp" style=""></span>6&#46;<span class="elsevierStyleSup">a</span> oleada&#44; n &#40;&#37;&#41;&nbsp;\t\t\t\t\t\t\n
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                  \t\t\t\t  " align="left" valign="\n
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                  \t\t\t\t\ttable-entry\n
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                  \t\t\t\t\ttable-entry\n
                  \t\t\t\t  " align="left" valign="\n
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                  \t\t\t\t">146 &#40;114-187&#41;&nbsp;\t\t\t\t\t\t\n
                  \t\t\t\t</td></tr><tr title="table-row"><td class="td-with-role" title="\n
                  \t\t\t\t\ttable-entry\n
                  \t\t\t\t ; entry_with_role_rowhead " align="left" valign="\n
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                  \t\t\t\t  " align="left" valign="\n
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                  \t\t\t\t</td></tr><tr title="table-row"><td class="td-with-role" title="\n
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                  \t\t\t\t ; entry_with_role_rowhead " align="left" valign="\n
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                  \t\t\t\t  " align="left" valign="\n
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                  \t\t\t\t">300 &#40;33&#37;&#41;&nbsp;\t\t\t\t\t\t\n
                  \t\t\t\t</td></tr><tr title="table-row"><td class="td-with-role" title="\n
                  \t\t\t\t\ttable-entry\n
                  \t\t\t\t ; entry_with_role_rowhead " align="left" valign="\n
                  \t\t\t\t\ttop\n
                  \t\t\t\t"><span class="elsevierStyleItalic">Empleo de corticoides&#44; n &#40;&#37;&#41;</span>&nbsp;\t\t\t\t\t\t\n
                  \t\t\t\t</td><td class="td" title="\n
                  \t\t\t\t\ttable-entry\n
                  \t\t\t\t  " align="left" valign="\n
                  \t\t\t\t\ttop\n
                  \t\t\t\t">654 &#40;73&#37;&#41;&nbsp;\t\t\t\t\t\t\n
                  \t\t\t\t</td></tr><tr title="table-row"><td class="td-with-role" title="\n
                  \t\t\t\t\ttable-entry\n
                  \t\t\t\t ; entry_with_role_rowhead " align="left" valign="\n
                  \t\t\t\t\ttop\n
                  \t\t\t\t"><span class="elsevierStyleItalic">D&#237;as de VM&#44; mediana &#40;p25-p75&#41;</span>&nbsp;\t\t\t\t\t\t\n
                  \t\t\t\t</td><td class="td" title="\n
                  \t\t\t\t\ttable-entry\n
                  \t\t\t\t  " align="left" valign="\n
                  \t\t\t\t\ttop\n
                  \t\t\t\t">9 &#40;5-16&#41;&nbsp;\t\t\t\t\t\t\n
                  \t\t\t\t</td></tr><tr title="table-row"><td class="td-with-role" title="\n
                  \t\t\t\t\ttable-entry\n
                  \t\t\t\t ; entry_with_role_rowhead " align="left" valign="\n
                  \t\t\t\t\ttop\n
                  \t\t\t\t"><span class="elsevierStyleItalic">Estancia UCI &#40;d&#237;as&#41;&#44; mediana &#40;p25-p75&#41;</span>&nbsp;\t\t\t\t\t\t\n
                  \t\t\t\t</td><td class="td" title="\n
                  \t\t\t\t\ttable-entry\n
                  \t\t\t\t  " align="left" valign="\n
                  \t\t\t\t\ttop\n
                  \t\t\t\t">9 &#40;4-17&#41;&nbsp;\t\t\t\t\t\t\n
                  \t\t\t\t</td></tr></tbody></table>
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                  \t\t\t\t\ttop\n
                  \t\t\t\t" scope="col" style="border-bottom: 2px solid black">&nbsp;\t\t\t\t\t\t\n
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                  \t\t\t\t\ttable-head\n
                  \t\t\t\t  " align="left" valign="\n
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                  \t\t\t\t" scope="col" style="border-bottom: 2px solid black">Primer tercil14 horas &#40;IC<span class="elsevierStyleHsp" style=""></span>95&#37;&#58; 10-16&#41;n<span class="elsevierStyleHsp" style=""></span>&#61;<span class="elsevierStyleHsp" style=""></span>111&nbsp;\t\t\t\t\t\t\n
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                  \t\t\t\t\ttable-head\n
                  \t\t\t\t  " align="left" valign="\n
                  \t\t\t\t\ttop\n
                  \t\t\t\t" scope="col" style="border-bottom: 2px solid black">Segundo tercil19 horas &#40;IC<span class="elsevierStyleHsp" style=""></span>95&#37;&#58; 18-20&#41;n<span class="elsevierStyleHsp" style=""></span>&#61;<span class="elsevierStyleHsp" style=""></span>95&nbsp;\t\t\t\t\t\t\n
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                  \t\t\t\t\ttable-head\n
                  \t\t\t\t  " align="left" valign="\n
                  \t\t\t\t\ttop\n
                  \t\t\t\t" scope="col" style="border-bottom: 2px solid black">Tercer tercil22 horas &#40;IC<span class="elsevierStyleHsp" style=""></span>95&#37;&#58; 21-24&#41;n<span class="elsevierStyleHsp" style=""></span>&#61;<span class="elsevierStyleHsp" style=""></span>65&nbsp;\t\t\t\t\t\t\n
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                  \t\t\t\t\ttable-head\n
                  \t\t\t\t  " align="left" valign="\n
                  \t\t\t\t\ttop\n
                  \t\t\t\t" scope="col" style="border-bottom: 2px solid black">p&nbsp;\t\t\t\t\t\t\n
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                  \t\t\t\t</td><td class="td" title="\n
                  \t\t\t\t\ttable-entry\n
                  \t\t\t\t  " align="left" valign="\n
                  \t\t\t\t\ttop\n
                  \t\t\t\t">17 &#40;15&#37;&#41;21 &#40;19&#37;&#41;29 &#40;26&#37;&#41;17 &#40;15&#37;&#41;10 &#40;9&#37;&#41;17 &#40;15&#37;&#41;&nbsp;\t\t\t\t\t\t\n
                  \t\t\t\t</td><td class="td" title="\n
                  \t\t\t\t\ttable-entry\n
                  \t\t\t\t  " align="left" valign="\n
                  \t\t\t\t\ttop\n
                  \t\t\t\t">8 &#40;8&#37;&#41;29 &#40;30&#37;&#41;30 &#40;31&#37;&#41;7 &#40;7&#37;&#41;9 &#40;9&#37;&#41;12 &#40;13&#37;&#41;&nbsp;\t\t\t\t\t\t\n
                  \t\t\t\t</td><td class="td" title="\n
                  \t\t\t\t\ttable-entry\n
                  \t\t\t\t  " align="left" valign="\n
                  \t\t\t\t\ttop\n
                  \t\t\t\t">12 &#40;18&#37;&#41;14 &#40;21&#37;&#41;15 &#40;23&#37;&#41;10 &#40;15&#37;&#41;6 &#40;9&#37;&#41;8 &#40;12&#37;&#41;&nbsp;\t\t\t\t\t\t\n
                  \t\t\t\t</td><td class="td" title="\n
                  \t\t\t\t\ttable-entry\n
                  \t\t\t\t  " align="left" valign="\n
                  \t\t\t\t\ttop\n
                  \t\t\t\t">0&#44;36&nbsp;\t\t\t\t\t\t\n
                  \t\t\t\t</td></tr><tr title="table-row"><td class="td-with-role" title="\n
                  \t\t\t\t\ttable-entry\n
                  \t\t\t\t ; entry_with_role_rowhead " align="left" valign="\n
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                  \t\t\t\t"><span class="elsevierStyleBold">Comorbilidades</span>&nbsp;\t\t\t\t\t\t\n
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                  \t\t\t\t  " align="" valign="\n
                  \t\t\t\t\ttop\n
                  \t\t\t\t">&nbsp;\t\t\t\t\t\t\n
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                  \t\t\t\t\ttable-entry\n
                  \t\t\t\t  " align="" valign="\n
                  \t\t\t\t\ttop\n
                  \t\t\t\t">&nbsp;\t\t\t\t\t\t\n
                  \t\t\t\t</td><td class="td" title="\n
                  \t\t\t\t\ttable-entry\n
                  \t\t\t\t  " align="" valign="\n
                  \t\t\t\t\ttop\n
                  \t\t\t\t">&nbsp;\t\t\t\t\t\t\n
                  \t\t\t\t</td><td class="td" title="\n
                  \t\t\t\t\ttable-entry\n
                  \t\t\t\t  " align="" valign="\n
                  \t\t\t\t\ttop\n
                  \t\t\t\t">&nbsp;\t\t\t\t\t\t\n
                  \t\t\t\t</td></tr><tr title="table-row"><td class="td-with-role" title="\n
                  \t\t\t\t\ttable-entry\n
                  \t\t\t\t ; entry_with_role_rowhead " align="left" valign="\n
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                  \t\t\t\t"><span class="elsevierStyleHsp" style=""></span><span class="elsevierStyleItalic">Edad &#40;a&#241;os&#41;&#44; mediana &#40;p25-75&#41;</span>&nbsp;\t\t\t\t\t\t\n
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                  \t\t\t\t\ttable-entry\n
                  \t\t\t\t  " align="left" valign="\n
                  \t\t\t\t\ttop\n
                  \t\t\t\t">63 &#40;55-70&#41;&nbsp;\t\t\t\t\t\t\n
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                  \t\t\t\t\ttable-entry\n
                  \t\t\t\t  " align="left" valign="\n
                  \t\t\t\t\ttop\n
                  \t\t\t\t">65 &#40;56-72&#41;&nbsp;\t\t\t\t\t\t\n
                  \t\t\t\t</td><td class="td" title="\n
                  \t\t\t\t\ttable-entry\n
                  \t\t\t\t  " align="left" valign="\n
                  \t\t\t\t\ttop\n
                  \t\t\t\t">65 &#40;53-70&nbsp;\t\t\t\t\t\t\n
                  \t\t\t\t</td><td class="td" title="\n
                  \t\t\t\t\ttable-entry\n
                  \t\t\t\t  " align="left" valign="\n
                  \t\t\t\t\ttop\n
                  \t\t\t\t">0&#44;65&nbsp;\t\t\t\t\t\t\n
                  \t\t\t\t</td></tr><tr title="table-row"><td class="td-with-role" title="\n
                  \t\t\t\t\ttable-entry\n
                  \t\t\t\t ; entry_with_role_rowhead " align="left" valign="\n
                  \t\t\t\t\ttop\n
                  \t\t\t\t"><span class="elsevierStyleHsp" style=""></span><span class="elsevierStyleItalic">Sexo masculino&#44; n &#40;&#37;&#41;</span>&nbsp;\t\t\t\t\t\t\n
                  \t\t\t\t</td><td class="td" title="\n
                  \t\t\t\t\ttable-entry\n
                  \t\t\t\t  " align="left" valign="\n
                  \t\t\t\t\ttop\n
                  \t\t\t\t">79 &#40;71&#37;&#41;&nbsp;\t\t\t\t\t\t\n
                  \t\t\t\t</td><td class="td" title="\n
                  \t\t\t\t\ttable-entry\n
                  \t\t\t\t  " align="left" valign="\n
                  \t\t\t\t\ttop\n
                  \t\t\t\t">67 &#40;70&#37;&#41;&nbsp;\t\t\t\t\t\t\n
                  \t\t\t\t</td><td class="td" title="\n
                  \t\t\t\t\ttable-entry\n
                  \t\t\t\t  " align="left" valign="\n
                  \t\t\t\t\ttop\n
                  \t\t\t\t">47 &#40;72&#37;&#41;&nbsp;\t\t\t\t\t\t\n
                  \t\t\t\t</td><td class="td" title="\n
                  \t\t\t\t\ttable-entry\n
                  \t\t\t\t  " align="left" valign="\n
                  \t\t\t\t\ttop\n
                  \t\t\t\t">0&#44;97&nbsp;\t\t\t\t\t\t\n
                  \t\t\t\t</td></tr><tr title="table-row"><td class="td-with-role" title="\n
                  \t\t\t\t\ttable-entry\n
                  \t\t\t\t ; entry_with_role_rowhead " align="left" valign="\n
                  \t\t\t\t\ttop\n
                  \t\t\t\t"><span class="elsevierStyleHsp" style=""></span><span class="elsevierStyleItalic">Estado vacunaci&#243;n&#58;</span><span class="elsevierStyleHsp" style=""></span><span class="elsevierStyleHsp" style=""></span>Completa&#44; n &#40;&#37;&#41;<span class="elsevierStyleHsp" style=""></span><span class="elsevierStyleHsp" style=""></span>Incompleta&#44; n &#40;&#37;&#41;<span class="elsevierStyleHsp" style=""></span><span class="elsevierStyleHsp" style=""></span>No vacunados&#44; n &#40;&#37;&#41;&nbsp;\t\t\t\t\t\t\n
                  \t\t\t\t</td><td class="td" title="\n
                  \t\t\t\t\ttable-entry\n
                  \t\t\t\t  " align="left" valign="\n
                  \t\t\t\t\ttop\n
                  \t\t\t\t">4 &#40;4&#37;&#41;11 &#40;10&#37;&#41;96 &#40;86&#37;&#41;&nbsp;\t\t\t\t\t\t\n
                  \t\t\t\t</td><td class="td" title="\n
                  \t\t\t\t\ttable-entry\n
                  \t\t\t\t  " align="left" valign="\n
                  \t\t\t\t\ttop\n
                  \t\t\t\t">1 &#40;1&#37;&#41;9 &#40;9&#37;&#41;85 &#40;89&#37;&#41;&nbsp;\t\t\t\t\t\t\n
                  \t\t\t\t</td><td class="td" title="\n
                  \t\t\t\t\ttable-entry\n
                  \t\t\t\t  " align="left" valign="\n
                  \t\t\t\t\ttop\n
                  \t\t\t\t">1 &#40;1&#37;&#41;4 &#40;6&#37;&#41;60 &#40;92&#37;&#41;&nbsp;\t\t\t\t\t\t\n
                  \t\t\t\t</td><td class="td" title="\n
                  \t\t\t\t\ttable-entry\n
                  \t\t\t\t  " align="left" valign="\n
                  \t\t\t\t\ttop\n
                  \t\t\t\t">0&#44;63&nbsp;\t\t\t\t\t\t\n
                  \t\t\t\t</td></tr><tr title="table-row"><td class="td-with-role" title="\n
                  \t\t\t\t\ttable-entry\n
                  \t\t\t\t ; entry_with_role_rowhead " align="left" valign="\n
                  \t\t\t\t\ttop\n
                  \t\t\t\t"><span class="elsevierStyleHsp" style=""></span><span class="elsevierStyleItalic">HTA&#44; n &#40;&#37;&#41;</span>&nbsp;\t\t\t\t\t\t\n
                  \t\t\t\t</td><td class="td" title="\n
                  \t\t\t\t\ttable-entry\n
                  \t\t\t\t  " align="left" valign="\n
                  \t\t\t\t\ttop\n
                  \t\t\t\t">58 &#40;52&#37;&#41;&nbsp;\t\t\t\t\t\t\n
                  \t\t\t\t</td><td class="td" title="\n
                  \t\t\t\t\ttable-entry\n
                  \t\t\t\t  " align="left" valign="\n
                  \t\t\t\t\ttop\n
                  \t\t\t\t">42 &#40;44&#37;&#41;&nbsp;\t\t\t\t\t\t\n
                  \t\t\t\t</td><td class="td" title="\n
                  \t\t\t\t\ttable-entry\n
                  \t\t\t\t  " align="left" valign="\n
                  \t\t\t\t\ttop\n
                  \t\t\t\t">26 &#40;40&#37;&#41;&nbsp;\t\t\t\t\t\t\n
                  \t\t\t\t</td><td class="td" title="\n
                  \t\t\t\t\ttable-entry\n
                  \t\t\t\t  " align="left" valign="\n
                  \t\t\t\t\ttop\n
                  \t\t\t\t">0&#44;25&nbsp;\t\t\t\t\t\t\n
                  \t\t\t\t</td></tr><tr title="table-row"><td class="td-with-role" title="\n
                  \t\t\t\t\ttable-entry\n
                  \t\t\t\t ; entry_with_role_rowhead " align="left" valign="\n
                  \t\t\t\t\ttop\n
                  \t\t\t\t"><span class="elsevierStyleHsp" style=""></span><span class="elsevierStyleItalic">Obesidad&#44; n &#40;&#37;&#41;</span>&nbsp;\t\t\t\t\t\t\n
                  \t\t\t\t</td><td class="td" title="\n
                  \t\t\t\t\ttable-entry\n
                  \t\t\t\t  " align="left" valign="\n
                  \t\t\t\t\ttop\n
                  \t\t\t\t">24 &#40;22&#37;&#41;&nbsp;\t\t\t\t\t\t\n
                  \t\t\t\t</td><td class="td" title="\n
                  \t\t\t\t\ttable-entry\n
                  \t\t\t\t  " align="left" valign="\n
                  \t\t\t\t\ttop\n
                  \t\t\t\t">18 &#40;19&#37;&#41;&nbsp;\t\t\t\t\t\t\n
                  \t\t\t\t</td><td class="td" title="\n
                  \t\t\t\t\ttable-entry\n
                  \t\t\t\t  " align="left" valign="\n
                  \t\t\t\t\ttop\n
                  \t\t\t\t">10 &#40;15&#37;&#41;&nbsp;\t\t\t\t\t\t\n
                  \t\t\t\t</td><td class="td" title="\n
                  \t\t\t\t\ttable-entry\n
                  \t\t\t\t  " align="left" valign="\n
                  \t\t\t\t\ttop\n
                  \t\t\t\t">0&#44;60&nbsp;\t\t\t\t\t\t\n
                  \t\t\t\t</td></tr><tr title="table-row"><td class="td-with-role" title="\n
                  \t\t\t\t\ttable-entry\n
                  \t\t\t\t ; entry_with_role_rowhead " align="left" valign="\n
                  \t\t\t\t\ttop\n
                  \t\t\t\t"><span class="elsevierStyleHsp" style=""></span><span class="elsevierStyleItalic">Diab&#233;tico&#44; n &#40;&#37;&#41;</span>&nbsp;\t\t\t\t\t\t\n
                  \t\t\t\t</td><td class="td" title="\n
                  \t\t\t\t\ttable-entry\n
                  \t\t\t\t  " align="left" valign="\n
                  \t\t\t\t\ttop\n
                  \t\t\t\t">19 &#40;17&#37;&#41;&nbsp;\t\t\t\t\t\t\n
                  \t\t\t\t</td><td class="td" title="\n
                  \t\t\t\t\ttable-entry\n
                  \t\t\t\t  " align="left" valign="\n
                  \t\t\t\t\ttop\n
                  \t\t\t\t">19 &#40;20&#37;&#41;&nbsp;\t\t\t\t\t\t\n
                  \t\t\t\t</td><td class="td" title="\n
                  \t\t\t\t\ttable-entry\n
                  \t\t\t\t  " align="left" valign="\n
                  \t\t\t\t\ttop\n
                  \t\t\t\t">14 &#40;21&#37;&#41;&nbsp;\t\t\t\t\t\t\n
                  \t\t\t\t</td><td class="td" title="\n
                  \t\t\t\t\ttable-entry\n
                  \t\t\t\t  " align="left" valign="\n
                  \t\t\t\t\ttop\n
                  \t\t\t\t">0&#44;75&nbsp;\t\t\t\t\t\t\n
                  \t\t\t\t</td></tr><tr title="table-row"><td class="td-with-role" title="\n
                  \t\t\t\t\ttable-entry\n
                  \t\t\t\t ; entry_with_role_rowhead " align="left" valign="\n
                  \t\t\t\t\ttop\n
                  \t\t\t\t"><span class="elsevierStyleHsp" style=""></span><span class="elsevierStyleItalic">Dislipemia&#44; n &#40;&#37;&#41;</span>&nbsp;\t\t\t\t\t\t\n
                  \t\t\t\t</td><td class="td" title="\n
                  \t\t\t\t\ttable-entry\n
                  \t\t\t\t  " align="left" valign="\n
                  \t\t\t\t\ttop\n
                  \t\t\t\t">39 &#40;35&#37;&#41;&nbsp;\t\t\t\t\t\t\n
                  \t\t\t\t</td><td class="td" title="\n
                  \t\t\t\t\ttable-entry\n
                  \t\t\t\t  " align="left" valign="\n
                  \t\t\t\t\ttop\n
                  \t\t\t\t">21 &#40;22&#37;&#41;&nbsp;\t\t\t\t\t\t\n
                  \t\t\t\t</td><td class="td" title="\n
                  \t\t\t\t\ttable-entry\n
                  \t\t\t\t  " align="left" valign="\n
                  \t\t\t\t\ttop\n
                  \t\t\t\t">19 &#40;29&#37;&#41;&nbsp;\t\t\t\t\t\t\n
                  \t\t\t\t</td><td class="td" title="\n
                  \t\t\t\t\ttable-entry\n
                  \t\t\t\t  " align="left" valign="\n
                  \t\t\t\t\ttop\n
                  \t\t\t\t">0&#44;12&nbsp;\t\t\t\t\t\t\n
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                  \t\t\t\t  " align="center" valign="\n
                  \t\t\t\t\ttop\n
                  \t\t\t\t" scope="col" style="border-bottom: 2px solid black">Tercer tercil22 horas &#40;IC<span class="elsevierStyleHsp" style=""></span>95&#37;&#58; 21-24&#41;n<span class="elsevierStyleHsp" style=""></span>&#61;<span class="elsevierStyleHsp" style=""></span>65&nbsp;\t\t\t\t\t\t\n
                  \t\t\t\t\t\t</th><th class="td" title="\n
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                  \t\t\t\t" scope="col" style="border-bottom: 2px solid black">p&nbsp;\t\t\t\t\t\t\n
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                  \t\t\t\t"><span class="elsevierStyleHsp" style=""></span><span class="elsevierStyleItalic">IRA como principal motivo de ingreso en UCI&#44; n&#40;&#37;&#41;</span>&nbsp;\t\t\t\t\t\t\n
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                  \t\t\t\t  " colspan="5" align="left" valign="\n
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                  \t\t\t\t"><span class="elsevierStyleBold">Variables y acciones terap&#233;uticas relacionadas con insuficiencia respiratoria</span></td></tr><tr title="table-row"><td class="td-with-role" title="\n
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                  \t\t\t\t"><span class="elsevierStyleHsp" style=""></span><span class="elsevierStyleItalic">P&#47;F ingreso en UCI&#44; mmHg&#44; mediana &#40;p25-75&#41;</span>&nbsp;\t\t\t\t\t\t\n
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                  \t\t\t\t">120 &#40;91-144&#41;&nbsp;\t\t\t\t\t\t\n
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                  \t\t\t\t">142 &#40;106-169&#41;&nbsp;\t\t\t\t\t\t\n
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                  \t\t\t\t">120 &#40;86-147&#41;&nbsp;\t\t\t\t\t\t\n
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                  \t\t\t\t\ttable-entry\n
                  \t\t\t\t  " align="center" valign="\n
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                  \t\t\t\t">&#60;<span class="elsevierStyleHsp" style=""></span>0&#44;05&nbsp;\t\t\t\t\t\t\n
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                  \t\t\t\t\ttable-entry\n
                  \t\t\t\t ; entry_with_role_rowhead " align="left" valign="\n
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                  \t\t\t\t"><span class="elsevierStyleHsp" style=""></span><span class="elsevierStyleItalic">Empleo previo CNAF en UCI&#44; n &#40;&#37;&#41;</span>&nbsp;\t\t\t\t\t\t\n
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                  \t\t\t\t\ttable-entry\n
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                  \t\t\t\t">21 &#40;32&#37;&#41;&nbsp;\t\t\t\t\t\t\n
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                  \t\t\t\t">0&#44;05&nbsp;\t\t\t\t\t\t\n
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                  \t\t\t\t ; entry_with_role_rowhead " align="left" valign="\n
                  \t\t\t\t\ttop\n
                  \t\t\t\t"><span class="elsevierStyleHsp" style=""></span><span class="elsevierStyleItalic">Horas con CNAF&#44; mediana &#40;p25-75&#41;</span>&nbsp;\t\t\t\t\t\t\n
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                  \t\t\t\t">45 &#40;17-72&#41;&nbsp;\t\t\t\t\t\t\n
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                  \t\t\t\t">15 &#40;11-24&#41;&nbsp;\t\t\t\t\t\t\n
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                  \t\t\t\t">0&#44;02&nbsp;\t\t\t\t\t\t\n
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                  \t\t\t\t ; entry_with_role_rowhead " align="left" valign="\n
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                  \t\t\t\t"><span class="elsevierStyleHsp" style=""></span><span class="elsevierStyleItalic">P&#47;F previo a VM&#44; mmHg&#44; mediana &#40;p25-75&#41;</span>&nbsp;\t\t\t\t\t\t\n
                  \t\t\t\t</td><td class="td" title="\n
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                  \t\t\t\t">100 &#40;87-120&#41;&nbsp;\t\t\t\t\t\t\n
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                  \t\t\t\t">105 &#40;87-135&#41;&nbsp;\t\t\t\t\t\t\n
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                  \t\t\t\t">100 &#40;80-130&#41;&nbsp;\t\t\t\t\t\t\n
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                  \t\t\t\t">0&#44;43&nbsp;\t\t\t\t\t\t\n
                  \t\t\t\t</td></tr><tr title="table-row"><td class="td-with-role" title="\n
                  \t\t\t\t\ttable-entry\n
                  \t\t\t\t ; entry_with_role_rowhead " align="left" valign="\n
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                  \t\t\t\t"><span class="elsevierStyleHsp" style=""></span><span class="elsevierStyleItalic">D&#237;as UCI-PDP&#44; mediana &#40;p25-75&#41;</span>&nbsp;\t\t\t\t\t\t\n
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                  \t\t\t\t">1 &#40;1-2&#41;&nbsp;\t\t\t\t\t\t\n
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                  \t\t\t\t">0&#44;25&nbsp;\t\t\t\t\t\t\n
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                  \t\t\t\t ; entry_with_role_rowhead " align="left" valign="\n
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                  \t\t\t\t"><span class="elsevierStyleHsp" style=""></span><span class="elsevierStyleItalic">P&#47;F previa a PDP&#44; mediana &#40;p25-75&#41;</span>&nbsp;\t\t\t\t\t\t\n
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                  \t\t\t\t">124 &#40;97-156&#41;&nbsp;\t\t\t\t\t\t\n
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                  \t\t\t\t">120 &#40;100-150&#41;&nbsp;\t\t\t\t\t\t\n
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                  \t\t\t\t">127 &#40;103-150&nbsp;\t\t\t\t\t\t\n
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                  \t\t\t\t">0&#44;73&nbsp;\t\t\t\t\t\t\n
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                  \t\t\t\t"><span class="elsevierStyleHsp" style=""></span><span class="elsevierStyleItalic">Duraci&#243;n &#40;horas&#41; PDP&#44; mediana &#40;p25-75&#41;</span>&nbsp;\t\t\t\t\t\t\n
                  \t\t\t\t</td><td class="td" title="\n
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                  \t\t\t\t">14 &#40;10-16&#41;&nbsp;\t\t\t\t\t\t\n
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                  \t\t\t\t">19 &#40;18-20&#41;&nbsp;\t\t\t\t\t\t\n
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                  \t\t\t\t">22 &#40;21-24&#41;&nbsp;\t\t\t\t\t\t\n
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                  \t\t\t\t  " align="center" valign="\n
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                  \t\t\t\t">&#60;<span class="elsevierStyleHsp" style=""></span>0&#44;05&nbsp;\t\t\t\t\t\t\n
                  \t\t\t\t</td></tr><tr title="table-row"><td class="td-with-role" title="\n
                  \t\t\t\t\ttable-entry\n
                  \t\t\t\t ; entry_with_role_rowhead " align="left" valign="\n
                  \t\t\t\t\ttop\n
                  \t\t\t\t"><span class="elsevierStyleHsp" style=""></span><span class="elsevierStyleItalic">Prono temprano&#44; n &#40;&#37;&#41;</span>&nbsp;\t\t\t\t\t\t\n
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                  \t\t\t\t">78 &#40;70&#37;&#41;&nbsp;\t\t\t\t\t\t\n
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                  \t\t\t\t">59 &#40;62&#37;&#41;&nbsp;\t\t\t\t\t\t\n
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                  \t\t\t\t">0&#44;37&nbsp;\t\t\t\t\t\t\n
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                  \t\t\t\t\ttop\n
                  \t\t\t\t"><span class="elsevierStyleHsp" style=""></span><span class="elsevierStyleItalic">N&#250;mero sesiones PDP&#44; mediana &#40;p25-75&#41;</span>&nbsp;\t\t\t\t\t\t\n
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                  \t\t\t\t">2 &#40;1-4&#41;&nbsp;\t\t\t\t\t\t\n
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                  \t\t\t\t">0&#44;95&nbsp;\t\t\t\t\t\t\n
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                  \t\t\t\t\ttable-entry\n
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                  \t\t\t\t\ttop\n
                  \t\t\t\t"><span class="elsevierStyleHsp" style=""></span><span class="elsevierStyleItalic">Recuento sesiones PDP&#44; n &#40;&#37;&#41;</span>&nbsp;\t\t\t\t\t\t\n
                  \t\t\t\t</td><td class="td" title="\n
                  \t\t\t\t\ttable-entry\n
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                  \t\t\t\t\ttable-entry\n
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                  \t\t\t\t\ttable-entry\n
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                  \t\t\t\t\ttable-entry\n
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                  \t\t\t\t">0&#44;11&nbsp;\t\t\t\t\t\t\n
                  \t\t\t\t</td></tr><tr title="table-row"><td class="td-with-role" title="\n
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                  \t\t\t\t ; entry_with_role_rowhead " align="left" valign="\n
                  \t\t\t\t\ttop\n
                  \t\t\t\t"><span class="elsevierStyleHsp" style=""></span><span class="elsevierStyleHsp" style=""></span>Sesi&#243;n &#250;nica&nbsp;\t\t\t\t\t\t\n
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                  \t\t\t\t\ttable-entry\n
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                  \t\t\t\t">38 &#40;34&#37;&#41;&nbsp;\t\t\t\t\t\t\n
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                  \t\t\t\t">33 &#40;35&#37;&#41;&nbsp;\t\t\t\t\t\t\n
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                  \t\t\t\t">18 &#40;28&#37;&#41;&nbsp;\t\t\t\t\t\t\n
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                  \t\t\t\t  " align="" valign="\n
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                  \t\t\t\t\ttop\n
                  \t\t\t\t"><span class="elsevierStyleHsp" style=""></span><span class="elsevierStyleHsp" style=""></span>2-5 sesiones&nbsp;\t\t\t\t\t\t\n
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                  \t\t\t\t\ttable-entry\n
                  \t\t\t\t  " align="center" valign="\n
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                  \t\t\t\t">56 &#40;50&#37;&#41;&nbsp;\t\t\t\t\t\t\n
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                  \t\t\t\t\ttable-entry\n
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                  \t\t\t\t">52 &#40;55&#37;&#41;&nbsp;\t\t\t\t\t\t\n
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                  \t\t\t\t">38 &#40;58&#37;&#41;&nbsp;\t\t\t\t\t\t\n
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                  \t\t\t\t">&nbsp;\t\t\t\t\t\t\n
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                  \t\t\t\t ; entry_with_role_rowhead " align="left" valign="\n
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                  \t\t\t\t"><span class="elsevierStyleHsp" style=""></span><span class="elsevierStyleHsp" style=""></span>&#62; 5 sesiones&nbsp;\t\t\t\t\t\t\n
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                  \t\t\t\t  " align="center" valign="\n
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                  \t\t\t\t">17 &#40;15&#37;&#41;&nbsp;\t\t\t\t\t\t\n
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                  \t\t\t\t">10 &#40;10&#37;&#41;&nbsp;\t\t\t\t\t\t\n
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                  \t\t\t\t  " align="center" valign="\n
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                  \t\t\t\t">9 &#40;14&#37;&#41;&nbsp;\t\t\t\t\t\t\n
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                  \t\t\t\t"><span class="elsevierStyleVsp" style="height:0.5px"></span></td></tr><tr title="table-row"><td class="td" title="\n
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                  \t\t\t\t  " colspan="5" align="left" valign="\n
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                  \t\t\t\t"><span class="elsevierStyleBold">Par&#225;metros ventilatorios iniciales</span></td></tr><tr title="table-row"><td class="td-with-role" title="\n
                  \t\t\t\t\ttable-entry\n
                  \t\t\t\t ; entry_with_role_rowhead " align="left" valign="\n
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                  \t\t\t\t"><span class="elsevierStyleHsp" style=""></span><span class="elsevierStyleItalic">Volumen corriente &#40;ml&#41;&#44; mediana &#40;p25-75&#41;</span>&nbsp;\t\t\t\t\t\t\n
                  \t\t\t\t</td><td class="td" title="\n
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                  \t\t\t\t  " align="center" valign="\n
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                  \t\t\t\t">470 &#40;450-485&#41;&nbsp;\t\t\t\t\t\t\n
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                  \t\t\t\t">475 &#40;450-490&#41;&nbsp;\t\t\t\t\t\t\n
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                  \t\t\t\t  " align="center" valign="\n
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                  \t\t\t\t">480 &#40;450-500&#41;&nbsp;\t\t\t\t\t\t\n
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                  \t\t\t\t  " align="center" valign="\n
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                  \t\t\t\t">0&#44;55&nbsp;\t\t\t\t\t\t\n
                  \t\t\t\t</td></tr><tr title="table-row"><td class="td-with-role" title="\n
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                  \t\t\t\t ; entry_with_role_rowhead " align="left" valign="\n
                  \t\t\t\t\ttop\n
                  \t\t\t\t"><span class="elsevierStyleHsp" style=""></span><span class="elsevierStyleItalic">FR &#40;rpm&#41;&#44; mediana &#40;p25-75&#41;</span>&nbsp;\t\t\t\t\t\t\n
                  \t\t\t\t</td><td class="td" title="\n
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                  \t\t\t\t  " align="center" valign="\n
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                  \t\t\t\t">18 &#40;16-20&#41;&nbsp;\t\t\t\t\t\t\n
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                  \t\t\t\t  " align="center" valign="\n
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                  \t\t\t\t">18 &#40;16-18&#41;&nbsp;\t\t\t\t\t\t\n
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                  \t\t\t\t">18 &#40;16-20&#41;&nbsp;\t\t\t\t\t\t\n
                  \t\t\t\t</td><td class="td" title="\n
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                  \t\t\t\t  " align="center" valign="\n
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                  \t\t\t\t">0&#44;65&nbsp;\t\t\t\t\t\t\n
                  \t\t\t\t</td></tr><tr title="table-row"><td class="td-with-role" title="\n
                  \t\t\t\t\ttable-entry\n
                  \t\t\t\t ; entry_with_role_rowhead " align="left" valign="\n
                  \t\t\t\t\ttop\n
                  \t\t\t\t"><span class="elsevierStyleHsp" style=""></span><span class="elsevierStyleItalic">PEEP&#44; cmH</span><span class="elsevierStyleInf"><span class="elsevierStyleItalic">2</span></span><span class="elsevierStyleItalic">O&#44; mediana &#40;p25-75&#41;</span>&nbsp;\t\t\t\t\t\t\n
                  \t\t\t\t</td><td class="td" title="\n
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                  \t\t\t\t  " align="center" valign="\n
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                  \t\t\t\t">10 &#40;10-12&#41;&nbsp;\t\t\t\t\t\t\n
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                  \t\t\t\t  " align="center" valign="\n
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                  \t\t\t\t">10 &#40;8-12&#41;&nbsp;\t\t\t\t\t\t\n
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                  \t\t\t\t  " align="center" valign="\n
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                  \t\t\t\t">12 &#40;10-13&#41;&nbsp;\t\t\t\t\t\t\n
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                  \t\t\t\t  " align="center" valign="\n
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                  \t\t\t\t">0&#44;24&nbsp;\t\t\t\t\t\t\n
                  \t\t\t\t</td></tr><tr title="table-row"><td class="td-with-role" title="\n
                  \t\t\t\t\ttable-entry\n
                  \t\t\t\t ; entry_with_role_rowhead " align="left" valign="\n
                  \t\t\t\t\ttop\n
                  \t\t\t\t"><span class="elsevierStyleHsp" style=""></span><span class="elsevierStyleItalic">P plateau&#44; cmH</span><span class="elsevierStyleInf"><span class="elsevierStyleItalic">2</span></span><span class="elsevierStyleItalic">O&#44; mediana &#40;p25-75&#41;</span>&nbsp;\t\t\t\t\t\t\n
                  \t\t\t\t</td><td class="td" title="\n
                  \t\t\t\t\ttable-entry\n
                  \t\t\t\t  " align="center" valign="\n
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                  \t\t\t\t">22 &#40;20-26&#41;&nbsp;\t\t\t\t\t\t\n
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                  \t\t\t\t  " align="center" valign="\n
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                  \t\t\t\t">23 &#40;21-25&#41;&nbsp;\t\t\t\t\t\t\n
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                  \t\t\t\t">22 &#40;21-25&#41;&nbsp;\t\t\t\t\t\t\n
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                  \t\t\t\t  " align="center" valign="\n
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                  \t\t\t\t">0&#44;69&nbsp;\t\t\t\t\t\t\n
                  \t\t\t\t</td></tr><tr title="table-row"><td class="td-with-role" title="\n
                  \t\t\t\t\ttable-entry\n
                  \t\t\t\t ; entry_with_role_rowhead " align="left" valign="\n
                  \t\t\t\t\ttop\n
                  \t\t\t\t"><span class="elsevierStyleHsp" style=""></span><span class="elsevierStyleItalic">DP&#44; cmH</span><span class="elsevierStyleInf"><span class="elsevierStyleItalic">2</span></span><span class="elsevierStyleItalic">O&#44; mediana &#40;p25-75&#41;</span>&nbsp;\t\t\t\t\t\t\n
                  \t\t\t\t</td><td class="td" title="\n
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                  \t\t\t\t  " align="center" valign="\n
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                  \t\t\t\t">10 &#40;9-14&#41;&nbsp;\t\t\t\t\t\t\n
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                  \t\t\t\t">11 &#40;9-14&#41;&nbsp;\t\t\t\t\t\t\n
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                  \t\t\t\t">11 &#40;8-14&#41;&nbsp;\t\t\t\t\t\t\n
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                  \t\t\t\t  " align="center" valign="\n
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                  \t\t\t\t">0&#44;74&nbsp;\t\t\t\t\t\t\n
                  \t\t\t\t</td></tr><tr title="table-row"><td class="td-with-role" title="\n
                  \t\t\t\t\ttable-entry\n
                  \t\t\t\t ; entry_with_role_rowhead " align="left" valign="\n
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                  \t\t\t\t"><span class="elsevierStyleHsp" style=""></span><span class="elsevierStyleItalic">Mechanical Power&#44; J&#47;min&#44; mediana &#40;p25-75&#41;</span>&nbsp;\t\t\t\t\t\t\n
                  \t\t\t\t</td><td class="td" title="\n
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                  \t\t\t\t  " align="center" valign="\n
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                  \t\t\t\t">17 &#40;15-21&#41;&nbsp;\t\t\t\t\t\t\n
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                  \t\t\t\t">18 &#40;14-20&#41;&nbsp;\t\t\t\t\t\t\n
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                  \t\t\t\t">18 &#40;16-20&#41;&nbsp;\t\t\t\t\t\t\n
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                  \t\t\t\t">0&#44;44&nbsp;\t\t\t\t\t\t\n
                  \t\t\t\t</td></tr><tr title="table-row"><td class="td" title="\n
                  \t\t\t\t\ttable-entry\n
                  \t\t\t\t  " colspan="5" align="left" valign="\n
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                  \t\t\t\t"><span class="elsevierStyleVsp" style="height:0.5px"></span></td></tr><tr title="table-row"><td class="td" title="\n
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                  \t\t\t\t  " colspan="5" align="left" valign="\n
                  \t\t\t\t\ttop\n
                  \t\t\t\t"><span class="elsevierStyleBold">Terapias empleadas frente SARS-CoV-2</span></td></tr><tr title="table-row"><td class="td-with-role" title="\n
                  \t\t\t\t\ttable-entry\n
                  \t\t\t\t ; entry_with_role_rowhead " align="left" valign="\n
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                  \t\t\t\t"><span class="elsevierStyleHsp" style=""></span><span class="elsevierStyleItalic">Empleo de remdesivir&#44; n &#40;&#37;&#41;</span>&nbsp;\t\t\t\t\t\t\n
                  \t\t\t\t</td><td class="td" title="\n
                  \t\t\t\t\ttable-entry\n
                  \t\t\t\t  " align="center" valign="\n
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                  \t\t\t\t">9 &#40;8&#37;&#41;&nbsp;\t\t\t\t\t\t\n
                  \t\t\t\t</td><td class="td" title="\n
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                  \t\t\t\t  " align="center" valign="\n
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                  \t\t\t\t">12 &#40;13&#37;&#41;&nbsp;\t\t\t\t\t\t\n
                  \t\t\t\t</td><td class="td" title="\n
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                  \t\t\t\t  " align="center" valign="\n
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                  \t\t\t\t">6 &#40;9&#37;&#41;&nbsp;\t\t\t\t\t\t\n
                  \t\t\t\t</td><td class="td" title="\n
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                  \t\t\t\t  " align="center" valign="\n
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                  \t\t\t\t">0&#44;54&nbsp;\t\t\t\t\t\t\n
                  \t\t\t\t</td></tr><tr title="table-row"><td class="td-with-role" title="\n
                  \t\t\t\t\ttable-entry\n
                  \t\t\t\t ; entry_with_role_rowhead " align="left" valign="\n
                  \t\t\t\t\ttop\n
                  \t\t\t\t"><span class="elsevierStyleHsp" style=""></span><span class="elsevierStyleItalic">Empleo de corticoides&#44; n &#40;&#37;&#41;</span>&nbsp;\t\t\t\t\t\t\n
                  \t\t\t\t</td><td class="td" title="\n
                  \t\t\t\t\ttable-entry\n
                  \t\t\t\t  " align="center" valign="\n
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                  \t\t\t\t">92 &#40;83&#37;&#41;&nbsp;\t\t\t\t\t\t\n
                  \t\t\t\t</td><td class="td" title="\n
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                  \t\t\t\t  " align="center" valign="\n
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                  \t\t\t\t">84 &#40;88&#37;&#41;&nbsp;\t\t\t\t\t\t\n
                  \t\t\t\t</td><td class="td" title="\n
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                  \t\t\t\t  " align="center" valign="\n
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                  \t\t\t\t">57 &#40;88&#37;&#41;&nbsp;\t\t\t\t\t\t\n
                  \t\t\t\t</td><td class="td" title="\n
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                  \t\t\t\t  " align="center" valign="\n
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                  \t\t\t\t">0&#44;47&nbsp;\t\t\t\t\t\t\n
                  \t\t\t\t</td></tr><tr title="table-row"><td class="td-with-role" title="\n
                  \t\t\t\t\ttable-entry\n
                  \t\t\t\t ; entry_with_role_rowhead " align="left" valign="\n
                  \t\t\t\t\ttop\n
                  \t\t\t\t"><span class="elsevierStyleHsp" style=""></span><span class="elsevierStyleItalic">Empleo de tocilizumab&#44; n &#40;&#37;&#41;</span>&nbsp;\t\t\t\t\t\t\n
                  \t\t\t\t</td><td class="td" title="\n
                  \t\t\t\t\ttable-entry\n
                  \t\t\t\t  " align="center" valign="\n
                  \t\t\t\t\ttop\n
                  \t\t\t\t">32 &#40;29&#37;&#41;&nbsp;\t\t\t\t\t\t\n
                  \t\t\t\t</td><td class="td" title="\n
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                  \t\t\t\t  " align="center" valign="\n
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                  \t\t\t\t">27 &#40;28&#37;&#41;&nbsp;\t\t\t\t\t\t\n
                  \t\t\t\t</td><td class="td" title="\n
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                  \t\t\t\t  " align="center" valign="\n
                  \t\t\t\t\ttop\n
                  \t\t\t\t">18 &#40;28&#37;&#41;&nbsp;\t\t\t\t\t\t\n
                  \t\t\t\t</td><td class="td" title="\n
                  \t\t\t\t\ttable-entry\n
                  \t\t\t\t  " align="center" valign="\n
                  \t\t\t\t\ttop\n
                  \t\t\t\t">0&#44;99&nbsp;\t\t\t\t\t\t\n
                  \t\t\t\t</td></tr><tr title="table-row"><td class="td-with-role" title="\n
                  \t\t\t\t\ttable-entry\n
                  \t\t\t\t ; entry_with_role_rowhead " align="left" valign="\n
                  \t\t\t\t\ttop\n
                  \t\t\t\t"><span class="elsevierStyleHsp" style=""></span><span class="elsevierStyleItalic">Empleo de plasma&#44; n &#40;&#37;&#41;</span>&nbsp;\t\t\t\t\t\t\n
                  \t\t\t\t</td><td class="td" title="\n
                  \t\t\t\t\ttable-entry\n
                  \t\t\t\t  " align="center" valign="\n
                  \t\t\t\t\ttop\n
                  \t\t\t\t">32 &#40;29&#37;&#41;&nbsp;\t\t\t\t\t\t\n
                  \t\t\t\t</td><td class="td" title="\n
                  \t\t\t\t\ttable-entry\n
                  \t\t\t\t  " align="center" valign="\n
                  \t\t\t\t\ttop\n
                  \t\t\t\t">28 &#40;29&#37;&#41;&nbsp;\t\t\t\t\t\t\n
                  \t\t\t\t</td><td class="td" title="\n
                  \t\t\t\t\ttable-entry\n
                  \t\t\t\t  " align="center" valign="\n
                  \t\t\t\t\ttop\n
                  \t\t\t\t">16 &#40;25&#37;&#41;&nbsp;\t\t\t\t\t\t\n
                  \t\t\t\t</td><td class="td" title="\n
                  \t\t\t\t\ttable-entry\n
                  \t\t\t\t  " align="center" valign="\n
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                  \t\t\t\t">0&#44;78&nbsp;\t\t\t\t\t\t\n
                  \t\t\t\t</td></tr><tr title="table-row"><td class="td" title="\n
                  \t\t\t\t\ttable-entry\n
                  \t\t\t\t  " colspan="5" align="left" valign="\n
                  \t\t\t\t\ttop\n
                  \t\t\t\t"><span class="elsevierStyleVsp" style="height:0.5px"></span></td></tr><tr title="table-row"><td class="td" title="\n
                  \t\t\t\t\ttable-entry\n
                  \t\t\t\t  " colspan="5" align="left" valign="\n
                  \t\t\t\t\ttop\n
                  \t\t\t\t"><span class="elsevierStyleBold">Terapias empleadas durante la estancia en la UCI</span></td></tr><tr title="table-row"><td class="td-with-role" title="\n
                  \t\t\t\t\ttable-entry\n
                  \t\t\t\t ; entry_with_role_rowhead " align="left" valign="\n
                  \t\t\t\t\ttop\n
                  \t\t\t\t"><span class="elsevierStyleHsp" style=""></span><span class="elsevierStyleItalic">Empleo de f&#225;rmacos vasoactivos&#44; n &#40;&#37;&#41;</span>&nbsp;\t\t\t\t\t\t\n
                  \t\t\t\t</td><td class="td" title="\n
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                  \t\t\t\t  " align="center" valign="\n
                  \t\t\t\t\ttop\n
                  \t\t\t\t">71 &#40;64&#37;&#41;&nbsp;\t\t\t\t\t\t\n
                  \t\t\t\t</td><td class="td" title="\n
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                  \t\t\t\t">56 &#40;59&#37;&#41;&nbsp;\t\t\t\t\t\t\n
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                  \t\t\t\t"><span class="elsevierStyleHsp" style=""></span><span class="elsevierStyleItalic">Empleo de TRRC&#44; n &#40;&#37;&#41;</span>&nbsp;\t\t\t\t\t\t\n
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                  \t\t\t\t"><span class="elsevierStyleHsp" style=""></span><span class="elsevierStyleItalic">Empleo de ECMO&#44; n &#40;&#37;&#41;</span>&nbsp;\t\t\t\t\t\t\n
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                  \t\t\t\t"><span class="elsevierStyleHsp" style=""></span><span class="elsevierStyleItalic">Empleo de iNO&#44; n &#40;&#37;&#41;</span>&nbsp;\t\t\t\t\t\t\n
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          "leyenda" => "<p id="spar0130" class="elsevierStyleSimplePara elsevierViewall">NAVM&#47;TAVM&#58; neumon&#237;a asociada a ventilaci&#243;n mec&#225;nica&#47;traqueobronquitis asociada ventilaci&#243;n mec&#225;nica&#59; TEP&#58; tromboembolismo pulmonar&#59; UCI&#58; unidad de cuidados intensivos&#59; VM&#58; ventilaci&#243;n mec&#225;nica&#46;</p>"
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                  \t\t\t\t" scope="col" style="border-bottom: 2px solid black">Primer tercil14 horas&#40;IC<span class="elsevierStyleHsp" style=""></span>95&#37;&#58; 10-16&#41;n<span class="elsevierStyleHsp" style=""></span>&#61;<span class="elsevierStyleHsp" style=""></span>111&nbsp;\t\t\t\t\t\t\n
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                  \t\t\t\t" scope="col" style="border-bottom: 2px solid black">Segundo tercil19 horas&#40;IC<span class="elsevierStyleHsp" style=""></span>95&#37;&#58; 18-20&#41;n<span class="elsevierStyleHsp" style=""></span>&#61;<span class="elsevierStyleHsp" style=""></span>95&nbsp;\t\t\t\t\t\t\n
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                  \t\t\t\t" scope="col" style="border-bottom: 2px solid black">Tercer tercil22 horas&#40;IC<span class="elsevierStyleHsp" style=""></span>95&#37;&#58; 21-24&#41;n<span class="elsevierStyleHsp" style=""></span>&#61;<span class="elsevierStyleHsp" style=""></span>65&nbsp;\t\t\t\t\t\t\n
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                  \t\t\t\t" scope="col" style="border-bottom: 2px solid black">p&nbsp;\t\t\t\t\t\t\n
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                  \t\t\t\t">D&#237;as de VM&#44; mediana &#40;p25-p75&#41;&nbsp;\t\t\t\t\t\t\n
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                  \t\t\t\t  " align="left" valign="\n
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                  \t\t\t\t  " align="left" valign="\n
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                  \t\t\t\t">12 &#40;8-19&#41;&nbsp;\t\t\t\t\t\t\n
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                  \t\t\t\t  " align="left" valign="\n
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                  \t\t\t\t">0&#44;74&nbsp;\t\t\t\t\t\t\n
                  \t\t\t\t</td></tr><tr title="table-row"><td class="td-with-role" title="\n
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                  \t\t\t\t">Estancia en UCI &#40;d&#237;as&#41;&#44; mediana &#40;p25-p75&#41;&nbsp;\t\t\t\t\t\t\n
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                  \t\t\t\t  " align="left" valign="\n
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                  \t\t\t\t  " align="left" valign="\n
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                  \t\t\t\t">15 &#40;10-27&#41;&nbsp;\t\t\t\t\t\t\n
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                  \t\t\t\t  " align="left" valign="\n
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                  \t\t\t\t">0&#44;88&nbsp;\t\t\t\t\t\t\n
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                  \t\t\t\t ; entry_with_role_rowhead " align="left" valign="\n
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                  \t\t\t\t">Diagn&#243;stico de NAVM&#47;TAVM&#44; n &#40;&#37;&#41;&nbsp;\t\t\t\t\t\t\n
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                  \t\t\t\t">61 &#40;64&#37;&#41;&nbsp;\t\t\t\t\t\t\n
                  \t\t\t\t</td><td class="td" title="\n
                  \t\t\t\t\ttable-entry\n
                  \t\t\t\t  " align="left" valign="\n
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                  \t\t\t\t">30 &#40;46&#37;&#41;&nbsp;\t\t\t\t\t\t\n
                  \t\t\t\t</td><td class="td" title="\n
                  \t\t\t\t\ttable-entry\n
                  \t\t\t\t  " align="left" valign="\n
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                  \t\t\t\t">0&#44;08&nbsp;\t\t\t\t\t\t\n
                  \t\t\t\t</td></tr><tr title="table-row"><td class="td-with-role" title="\n
                  \t\t\t\t\ttable-entry\n
                  \t\t\t\t ; entry_with_role_rowhead " align="left" valign="\n
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                  \t\t\t\t">Diagn&#243;stico de TEP masivo&#44; n &#40;&#37;&#41;&nbsp;\t\t\t\t\t\t\n
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                  \t\t\t\t\ttable-entry\n
                  \t\t\t\t  " align="left" valign="\n
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                  \t\t\t\t">7 &#40;6&#37;&#41;&nbsp;\t\t\t\t\t\t\n
                  \t\t\t\t</td><td class="td" title="\n
                  \t\t\t\t\ttable-entry\n
                  \t\t\t\t  " align="left" valign="\n
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                  \t\t\t\t">4 &#40;4&#37;&#41;&nbsp;\t\t\t\t\t\t\n
                  \t\t\t\t</td><td class="td" title="\n
                  \t\t\t\t\ttable-entry\n
                  \t\t\t\t  " align="left" valign="\n
                  \t\t\t\t\ttop\n
                  \t\t\t\t">3 &#40;5&#37;&#41;&nbsp;\t\t\t\t\t\t\n
                  \t\t\t\t</td><td class="td" title="\n
                  \t\t\t\t\ttable-entry\n
                  \t\t\t\t  " align="left" valign="\n
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                  \t\t\t\t">0&#44;77&nbsp;\t\t\t\t\t\t\n
                  \t\t\t\t</td></tr><tr title="table-row"><td class="td-with-role" title="\n
                  \t\t\t\t\ttable-entry\n
                  \t\t\t\t ; entry_with_role_rowhead " align="left" valign="\n
                  \t\t\t\t\ttop\n
                  \t\t\t\t">Necesidad de traqueostom&#237;a&#44; n &#40;&#37;&#41;&nbsp;\t\t\t\t\t\t\n
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                  \t\t\t\t  " align="left" valign="\n
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                  \t\t\t\t">22 &#40;20&#37;&#41;&nbsp;\t\t\t\t\t\t\n
                  \t\t\t\t</td><td class="td" title="\n
                  \t\t\t\t\ttable-entry\n
                  \t\t\t\t  " align="left" valign="\n
                  \t\t\t\t\ttop\n
                  \t\t\t\t">20 &#40;21&#37;&#41;&nbsp;\t\t\t\t\t\t\n
                  \t\t\t\t</td><td class="td" title="\n
                  \t\t\t\t\ttable-entry\n
                  \t\t\t\t  " align="left" valign="\n
                  \t\t\t\t\ttop\n
                  \t\t\t\t">11 &#40;17&#37;&#41;&nbsp;\t\t\t\t\t\t\n
                  \t\t\t\t</td><td class="td" title="\n
                  \t\t\t\t\ttable-entry\n
                  \t\t\t\t  " align="left" valign="\n
                  \t\t\t\t\ttop\n
                  \t\t\t\t">0&#44;81&nbsp;\t\t\t\t\t\t\n
                  \t\t\t\t</td></tr><tr title="table-row"><td class="td-with-role" title="\n
                  \t\t\t\t\ttable-entry\n
                  \t\t\t\t ; entry_with_role_rowhead " align="left" valign="\n
                  \t\t\t\t\ttop\n
                  \t\t\t\t">Mortalidad 90 d&#237;as&nbsp;\t\t\t\t\t\t\n
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                  \t\t\t\t  " align="left" valign="\n
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                  \t\t\t\t">27 &#40;24&#37;&#41;&nbsp;\t\t\t\t\t\t\n
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                  \t\t\t\t\ttable-entry\n
                  \t\t\t\t  " align="left" valign="\n
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                  \t\t\t\t">27 &#40;28&#37;&#41;&nbsp;\t\t\t\t\t\t\n
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                  \t\t\t\t  " align="left" valign="\n
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                  \t\t\t\t">0&#44;10&nbsp;\t\t\t\t\t\t\n
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                      "titulo" => "Prone positioning in severe acute respiratory distress syndrome"
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                        0 => array:2 [
                          "etal" => true
                          "autores" => array:6 [
                            0 => "C&#46; Gu&#233;rin"
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                            2 => "J&#46;-C&#46; Richard"
                            3 => "P&#46; Beuret"
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                      "doi" => "10.1056/NEJMoa1214103"
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                        "tituloSerie" => "N Engl J Med&#46;"
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                        "volumen" => "368"
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