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small sample sizes&#44; heterogeneous populations &#40;healthy subjects&#44; severe burn victims&#44; bone marrow transplant patients&#44; heart surgery patients&#44; liver transplant patients&#44; etc&#46;&#41;&#44; or participation of a single institution &#40;single-center studies&#41;&#46; Not surprisingly&#44; the review reported an extremely variable incidence of ARF &#40;10&#8211;82&#37;&#41;&#46;</p><p id="par0020" class="elsevierStylePara elsevierViewall">The results of a second consensus conference with the participation of representative specialists in Critical Care Medicine and Nephrology &#40;the Acute Kidney Injury Network&#41; were published in 2007&#44;<a class="elsevierStyleCrossRef" href="#bib0030"><span class="elsevierStyleSup">6</span></a> and proposed the AKIN classification with the purpose of improving the sensitivity and specificity of the RIFLE system&#46;</p><p id="par0025" class="elsevierStylePara elsevierViewall">Large studies have evaluated both systems&#46; In 2008&#44; Bagshaw et al&#46;<a class="elsevierStyleCrossRef" href="#bib0035"><span class="elsevierStyleSup">7</span></a> published the results of the analysis of a database containing over 120&#44;000 patients&#44; comparing the RIFLE and AKIN systems&#46; The incidence of ARF was 36&#46;1&#37; and 37&#46;1&#37;&#44; respectively&#44; and despite the weaknesses&#44; the authors concluded that AKIN does not offer advantages in terms of sensitivity&#44; consistency or predictive capacity with respect to RIFLE&#46;</p><p id="par0030" class="elsevierStylePara elsevierViewall">In 2008&#44; Osterman et al&#46;<a class="elsevierStyleCrossRef" href="#bib0040"><span class="elsevierStyleSup">8</span></a> applied the AKIN classification in 22&#44;300 patients&#44; recording an incidence of ARF of 35&#46;4&#37; and a good correlation between the severity of ARF and the prognosis&#8211;though only the most severe disease grade was identified as an independent mortality predictor&#46; In 2009&#44; Joannidis et al&#46;<a class="elsevierStyleCrossRef" href="#bib0045"><span class="elsevierStyleSup">9</span></a> published a comparison of the RIFLE versus the AKIN system in 14&#44;300 patients&#44; based on the data of the SAPS-3&#46; The incidence of ARF was found to be 28&#46;5&#37; and 38&#46;5&#37;&#44; respectively&#44; and the RIFLE classification showed greater consistency and a high ARF detection rate&#46; However&#44; the lack of urine output information biased the results&#44; since AKIN grades 1 and 2&#44; and RIFLE grades I and F&#44; could not be differentiated&#46; Both of the mentioned studies demonstrated an increase in morbidity-mortality associated to the development of ARF&#46;</p><p id="par0035" class="elsevierStylePara elsevierViewall">The recommendations of an international consensus conference held in Canada in 2007<a class="elsevierStyleCrossRef" href="#bib0050"><span class="elsevierStyleSup">10</span></a> with the purpose of establishing guidelines for the prevention and management of ARF in critical patients were published in 2010&#46; The mentioned consensus document considered cystatin C to be a promising marker that appears to detect ARF earlier than changes in plasma creatinine&#46; However&#44; both this and other biomarkers &#40;NGAL&#44; kidney injury molecule-1&#44; interleukin-18&#41; are still in the investigational stages&#46; It therefore was concluded that plasma creatinine remains the main marker &#40;despite the disadvantages related to the influence of body weight&#44; catabolic status&#44; the presence of rhabdomyolysis&#44; dilutional effects and drugs or other substances that alter creatinine secretion&#41;&#44; along with the measurement of diuresis&#46; The document thus recommends the RIFLE and AKIN criteria for diagnosing ARF&#44; and points out that although validation is still needed&#44; the AKIN system is able to identify ARF earlier than the RIFLE classification&#46;</p><p id="par0040" class="elsevierStylePara elsevierViewall">The present study analyzes the incidence of ARF in different ICUs&#44; using the RIFLE and AKIN criteria applied in strict compliance with the consensus definitions&#44; and compares the usefulness of both systems in predicting mortality and duration of stay in the ICU&#46;</p></span><span id="sec0010" class="elsevierStyleSection elsevierViewall"><span class="elsevierStyleSectionTitle" id="sect0100">Patients and methods</span><span id="sec0015" class="elsevierStyleSection elsevierViewall"><span class="elsevierStyleSectionTitle" id="sect0105">Study population</span><p id="par0045" class="elsevierStylePara elsevierViewall">A prospective study of 627 patients from 9 polyvalent ICUs was carried out between February 2010 and February 2011 &#40;<a class="elsevierStyleCrossRef" href="#tbl0005">Table 1</a>&#41;&#46; The study was approved by the Ethics Committee of each participating center&#46;</p><elsevierMultimedia ident="tbl0005"></elsevierMultimedia><p id="par0050" class="elsevierStylePara elsevierViewall">The study included patients over 18 years of age admitted to the ICU for at least 48<span class="elsevierStyleHsp" style=""></span>h&#44; with evaluation during the first 7 days of admission&#46; The exclusion criteria were&#58; inability to quantify diuresis at any time during the study period&#44; surgical instrumentation of the urinary tract &#40;cystostomy&#44; nephrostomy&#44; urinary fistulas&#44; etc&#46;&#41;&#44; and the need for renal support therapy &#40;RST&#41;&#8211;whether de novo &#40;RIFLE &#8220;loss&#8221; and &#8220;end&#8221; stages&#41; or chronic&#46;</p></span><span id="sec0020" class="elsevierStyleSection elsevierViewall"><span class="elsevierStyleSectionTitle" id="sect0110">Data collection and analysis</span><p id="par0055" class="elsevierStylePara elsevierViewall">Microsoft Excel was used for data collection&#44; with recording of the following parameters&#58; age&#44; sex&#44; ethnic origin&#44; current body weight &#40;reported by the patient or relatives&#41;&#44; height&#44; body mass index &#40;BMI&#41;&#44; the APACHE <span class="elsevierStyleSmallCaps">II</span> and SOFA scores upon admission&#44; disease leading to admission &#40;clinical or surgical&#41;&#44; days of stay in the ICU&#44; and mortality in the ICU and 30&#44; 60 and 90 days after discharge&#46; The APACHE <span class="elsevierStyleSmallCaps">II</span> and SOFA scores were calculated without excluding the creatinine parameters&#46;</p><p id="par0060" class="elsevierStylePara elsevierViewall">Urine collection was carried out in two ways depending on whether the patient carried a urinary catheter or not&#46; In patients without a catheter&#44; each micturition episode was quantified&#44; while urine was collected every two hours in the patients with a bladder catheter&#46; In both cases these amounts were used to calculate the hourly average from previous sampling&#46;</p><p id="par0065" class="elsevierStylePara elsevierViewall">In all cases hourly diuresis was expressed in relation to patient body weight&#44; yielding the calculated hourly diuresis &#40;CHD&#41; reported in ml&#47;kg&#47;h&#46; In all patients we recorded the daily measured plasma creatinine &#40;MPC&#41; value&#46;</p><p id="par0070" class="elsevierStylePara elsevierViewall">Based on the data referred to patient age&#44; sex&#44; ethnic origin and MPC&#44; the Modification of Diet in Renal Disease &#40;MDRD&#41; formula<a class="elsevierStyleCrossRef" href="#bib0055"><span class="elsevierStyleSup">11</span></a> was used to automatically calculate basal plasma creatinine &#40;BPC&#41;&#44; defined as the ideal creatinine value of the patient&#44; assuming a normal glomerular filtration rate &#40;GFR&#41; of 75<span class="elsevierStyleHsp" style=""></span>ml&#47;min&#47;1&#46;73<span class="elsevierStyleHsp" style=""></span>m<span class="elsevierStyleSup">2</span>&#44; and assigning a theoretical normal BPC for each age&#44; sex and ethnic group&#46;</p><p id="par0075" class="elsevierStylePara elsevierViewall">All the patients were evaluated by means of the RIFLE and AKIN systems &#40;<a class="elsevierStyleCrossRefs" href="#tbl0005">Tables 1 and 2</a>&#41;&#46; As established by consensus&#44; compliance with one or more of the urinary &#40;U&#41; and creatinine criteria &#40;C&#41; determined the diagnosis of ARF &#40;ARF-UC&#41;&#46; In addition&#44; both criteria were evaluated separately&#46;</p></span><span id="sec0025" class="elsevierStyleSection elsevierViewall"><span class="elsevierStyleSectionTitle" id="sect0115">Acute renal failure according to urinary criterion &#40;ARF-U&#41;</span><p id="par0080" class="elsevierStylePara elsevierViewall">Based on CHD&#44; we identified the cases that met the U criterion before the C criterion&#44; during a continuous period of 6&#44; 12 and 24 hours&#46; In this way the patients were simultaneously stratified according to RIFLE and AKIN every hour and during the 7 days of study into one of the four possible grades&#46; For RIFLE&#58; RIFLE zero &#40;without ARF&#41;&#44; R &#40;risk&#41;&#44; <span class="elsevierStyleSmallCaps">I</span> &#40;injury&#41; and F &#40;failure&#41;&#46; For AKIN&#58; AKIN 0&#44; AKIN 1&#44; AKIN 2 and AKIN 3&#46; Based on these hourly results referred to RIFLE and AKIN&#44; the program detected the most severe grade of ARF for each day of study&#44; with the obtainment of a daily stratification of ARF only according to the U criterion as established by RIFLE and AKIN&#46;</p></span><span id="sec0030" class="elsevierStyleSection elsevierViewall"><span class="elsevierStyleSectionTitle" id="sect0120">Acute renal failure according to creatinine criterion &#40;ARF-C&#41;</span><p id="par0085" class="elsevierStylePara elsevierViewall">Based on the MPC and BPC registries&#44; we identified those cases that first met the C criterion before the U criterion&#44; on a daily basis&#46; In the case of the RIFLE system&#44; we considered the daily increments in MPC with respect to BPC&#44; stratifying the patients only according to the C criterion&#46; For RIFLE&#58; zero&#44; R&#44; <span class="elsevierStyleSmallCaps">I</span> and F&#46; For AKIN we considered the increases in MPC with respect to MPC in the previous 48<span class="elsevierStyleHsp" style=""></span>h&#46; Accordingly&#44; the registry of ARF was only obtained on days 3&#44; 5 and 7 of the study&#44; yielding one of the four possible grades&#58; AKIN zero&#44; AKIN 1&#44; AKIN 2 and AKIN 3&#46;</p></span><span id="sec0035" class="elsevierStyleSection elsevierViewall"><span class="elsevierStyleSectionTitle" id="sect0125">Acute renal failure according to both criteria &#40;ARF-UC&#41;</span><p id="par0090" class="elsevierStylePara elsevierViewall">The patients meeting the U and C criteria simultaneously were identified and stratified into four possible ARF levels referred to both the RIFLE and the AKIN classification&#46;</p><p id="par0095" class="elsevierStylePara elsevierViewall">Neither volemia nor prior fluid therapy was considered&#46;</p><p id="par0100" class="elsevierStylePara elsevierViewall">The analysis of the selected variables was made using a program that generated an SQL database with the collected registries&#46; The database in turn was processed using the Statistical Package for the Social Sciences &#40;SPSS&#41;&#46;</p><p id="par0105" class="elsevierStylePara elsevierViewall">The homogeneity of the variables was controlled using the Levene test&#46; The Student <span class="elsevierStyleItalic">t</span>-test for the comparison of means was used to detect significant differences between the participating institutions&#46; In the case of patient sex&#44; we assessed differences in the proportion of females between institutions based on the chi-squared test&#46; A 95&#37; confidence level was considered for all the statistical tests&#46;</p></span></span><span id="sec0040" class="elsevierStyleSection elsevierViewall"><span class="elsevierStyleSectionTitle" id="sect0130">Results</span><span id="sec0045" class="elsevierStyleSection elsevierViewall"><span class="elsevierStyleSectionTitle" id="sect0135">Sample characteristics</span><p id="par0110" class="elsevierStylePara elsevierViewall">The mean values of the different characteristics of the global study sample &#40;n<span class="elsevierStyleHsp" style=""></span>&#61;<span class="elsevierStyleHsp" style=""></span>627&#41; were&#58; age 62 years &#40;range 18&#8211;97&#41;&#59; 63&#37; males and 37&#37; females&#59; BMI 26&#46;4<span class="elsevierStyleHsp" style=""></span>kg&#47;m<span class="elsevierStyleSup">2</span> &#40;range 12&#46;4&#8211;70&#46;3&#41;&#59; days of stay 13&#46;6&#59; APACHE score 15&#59; SOFA score 5&#59; 27&#46;6&#37; postsurgery cases &#40;elective surgery 16&#46;4&#37;&#59; emergency surgery 11&#46;2&#37;&#41;&#46;</p></span><span id="sec0050" class="elsevierStyleSection elsevierViewall"><span class="elsevierStyleSectionTitle" id="sect0140">Incidence of acute renal failure</span><p id="par0115" class="elsevierStylePara elsevierViewall">A total of 69&#46;4&#37; and 51&#46;8&#37; of the patients presented some grade of ARF according to the RIFLE and AKIN classification&#44; respectively &#40;<a class="elsevierStyleCrossRef" href="#fig0005">Fig&#46; 1</a>&#41;&#46;</p><elsevierMultimedia ident="fig0005"></elsevierMultimedia><p id="par0120" class="elsevierStylePara elsevierViewall">Most of the patients with ARF presented the mildest grade of renal failure &#40;RIFLE R&#58; 30&#46;6&#37; and AKIN 1&#58; 31&#46;1&#37;&#41;&#44; though RIFLE detected a larger number of patients with intermediate and severe grade ARF &#40;26&#46;6&#37; and 12&#46;1&#37;&#44; respectively&#41; than AKIN &#40;14&#46;7&#37; and 6&#46;1&#37;&#44; respectively&#41;&#46;</p><p id="par0125" class="elsevierStylePara elsevierViewall">A total of 8&#46;7&#37; of the patients classified as presenting ARF according to RIFLE did not have ARF according to AKIN&#44; while 9&#46;8&#37; of the patients with ARF according to AKIN did not have ARF according to RIFLE&#46; On the other hand&#44; a larger number of cases of ARF were detected on applying both classifications jointly &#40;467 patients&#41; than on applying only RIFLE &#40;435 patients&#41; or only AKIN &#40;325 patients&#41; &#40;<a class="elsevierStyleCrossRef" href="#fig0005">Fig&#46; 1</a>&#41;&#46;</p><p id="par0130" class="elsevierStylePara elsevierViewall">On examining the data only according to the U criterion&#44; the results were seen to be the same for RIFLE and AKIN&#44; since both systems had identical cutoff points in the consensus&#46; A total of 59&#46;5&#37; of the cases of ARF complied with the U criterion before they complied with the C criterion&#44; exhibiting no significant differences versus compliance with both criteria simultaneously&#46; In contrast&#44; the cases of ARF that first complied with the C criterion were fewer in number than the cases that complied with both criteria simultaneously&#58; 34&#46;7&#37; for RIFLE and 25&#46;3&#37; for AKIN &#40;<a class="elsevierStyleCrossRef" href="#fig0010">Fig&#46; 2</a>&#41;&#46;</p><elsevierMultimedia ident="fig0010"></elsevierMultimedia><p id="par0135" class="elsevierStylePara elsevierViewall">There were no significant differences regarding the days of stay in the ICU &#40;mean 14 days&#41; between the patients with and without ARF&#44; as evaluated by both the RIFLE and the AKIN classification&#46;</p><p id="par0140" class="elsevierStylePara elsevierViewall">The patients with ARF according to RIFLE were significantly older than those without ARF according to RIFLE&#46; Moreover&#44; older age was associated to increased severity&#46; A similar tendency was observed in the patients evaluated with the AKIN system&#44; though in this case the values failed to reach statistical significance&#46; Neither classification showed significant differences in the incidence of ARF with respect to patient sex&#59; however&#44; on only evaluating the U criterion&#44; the proportion of males was seen to increase with increasing severity of ARF&#44; with both the RIFLE and the AKIN system&#46; On the other hand&#44; BMI was significantly greater &#40;mean 27<span class="elsevierStyleHsp" style=""></span>kg&#47;m<span class="elsevierStyleSup">2</span>&#41; in the patients with ARF&#46; The APACHE <span class="elsevierStyleSmallCaps">II</span> and SOFA scores increased significantly with increasing severity of ARF&#44; with both the RIFLE and the AKIN system&#46; Most of the patients with ARF were non-surgical cases&#46; Only 34 patients required RST &#40;intermittent daily hemodialysis in 31 cases&#44; and continuous RST in 3 cases&#41;&#44; based on the following indications&#58; anuria&#44; acidosis&#44; volume overload&#44; refractory shock&#44; progressive plasma creatinine elevation and hyperpotassemia&#46;</p><p id="par0145" class="elsevierStylePara elsevierViewall">Daily diuresis among the patients without ARF was 2268<span class="elsevierStyleHsp" style=""></span>ml&#47;day with RIFLE and 2109<span class="elsevierStyleHsp" style=""></span>ml&#47;day in the case of AKIN&#46; The corresponding values were lower in the patients with ARF&#44; with significantly lesser values in situations of increasing severity&#46; However&#44; on evaluating the sensitivity of daily diuresis in detecting patients with ARF&#44; the area under the receiver operating characteristic &#40;ROC&#41; curve was found to be 66&#46;7&#37; for RIFLE and 62&#46;8&#37; for AKIN&#44; i&#46;e&#46;&#44; sensitivity was low&#46; In turn&#44; on evaluating the patients only with the U criterion&#44; daily diuresis decreased significantly with increasing risk of ARF&#46; Those patients without ARF presented a higher mean value &#40;2177<span class="elsevierStyleHsp" style=""></span>ml&#47;day&#41;&#44; which proved significant with respect to all grades of ARF&#46;</p><p id="par0150" class="elsevierStylePara elsevierViewall">The MPC of the patients without ARF according to the RIFLE classification was 0&#46;77<span class="elsevierStyleHsp" style=""></span>mg&#47;dl&#44; versus 1&#46;01<span class="elsevierStyleHsp" style=""></span>mg&#47;dl in those without ARF according to the AKIN system&#46; The MPC values were higher in the patients with ARF according to RIFLE&#44; and increased significantly with increasing severity&#46; The correlation between MPC and the presence of ARF and its severity was not observed in the patients stratified according to the AKIN system&#46; On the other hand&#44; MPC among the patients evaluated only according to the U criterion was also significantly higher in the more severe cases&#46; However&#44; on evaluating the sensitivity of MPC in detecting ARF&#44; the area of the ROC curve for RIFLE was 75&#46;5&#37;&#44; versus 59&#46;9&#37; in the case of AKIN&#46;</p></span><span id="sec0055" class="elsevierStyleSection elsevierViewall"><span class="elsevierStyleSectionTitle" id="sect0145">Mortality</span><p id="par0155" class="elsevierStylePara elsevierViewall">Global mortality &#40;mortality in the ICU and up to 90 days after discharge&#41; was 40&#46;9&#37; and 44&#46;6&#37; among the patients with ARF according to the RIFLE and ARF classification&#44; respectively&#44; and was significantly higher than among the patients without ARF &#40;19&#46;79&#37; and 23&#46;5&#37; according to RIFLE and AKIN&#44; respectively&#41;&#46; These values were similar to those obtained when the diagnosis of ARF was established based only on the C criterion &#40;ARF-C&#58; 49&#46;08&#37; and 51&#46;7&#37; according to RIFLE and AKIN&#44; respectively&#41; or only on the U criterion &#40;ARF-U&#58; 41&#46;82&#37; according to both RIFLE and AKIN&#41;&#46; The proportion of deaths increased significantly with increasing severity of ARF &#40;<a class="elsevierStyleCrossRef" href="#fig0015">Fig&#46; 3</a>&#41;&#46; The most severe grade of ARF was associated to markedly higher mortality rates &#40;71&#46;1&#37; and 61&#46;8&#37; according to AKIN and RIFLE&#44; respectively&#41;&#46;</p><elsevierMultimedia ident="fig0015"></elsevierMultimedia><p id="par0160" class="elsevierStylePara elsevierViewall">According to the AKIN classification&#44; the mortality rate of the most severe grade of ARF was significantly higher than in the case of mild or moderate ARF&#46; In the case of the RIFLE system&#44; the mortality rates corresponding to moderate and severe ARF were considerably higher than in the case of mild ARF or patients without ARF&#46; The largest proportion of deaths was recorded in the ICU&#44; in both the patients without ARF and in those of ARF of any grade of severity&#46;</p><p id="par0165" class="elsevierStylePara elsevierViewall">The mortality rate was higher in subjects with non-surgical conditions &#40;46&#46;56&#37; and 50&#46;40&#37;&#44; respectively&#41; than in surgical cases &#40;28&#46;69&#37; and 34&#46;56&#37;&#44; respectively&#41; among the patients with ARF according to both the RIFLE and the AKIN classification &#40;<a class="elsevierStyleCrossRef" href="#fig0020">Fig&#46; 4</a>&#41;&#46;</p><elsevierMultimedia ident="fig0020"></elsevierMultimedia><p id="par0170" class="elsevierStylePara elsevierViewall">The mortality relative risk increased progressively with increasing severity of ARF among the patients stratified according to both the RIFLE and the AKIN classification &#40;<a class="elsevierStyleCrossRef" href="#fig0025">Fig&#46; 5</a>&#41;&#46;</p><elsevierMultimedia ident="fig0025"></elsevierMultimedia></span></span><span id="sec0060" class="elsevierStyleSection elsevierViewall"><span class="elsevierStyleSectionTitle" id="sect0150">Discussion</span><p id="par0175" class="elsevierStylePara elsevierViewall">According to our results&#44; the incidence of ARF was greater than in the large studies published in the literature&#44; on applying both the RIFLE system and the AKIN classification &#40;<a class="elsevierStyleCrossRef" href="#tbl0010">Table 2</a>&#41;&#46; This increased incidence was observed for all grades of severity&#46;</p><elsevierMultimedia ident="tbl0010"></elsevierMultimedia><p id="par0180" class="elsevierStylePara elsevierViewall">The RIFLE system classified a larger number of patients with ARF than the AKIN classification&#44; in contrast to the observations of Brochard&#46;<a class="elsevierStyleCrossRef" href="#bib0050"><span class="elsevierStyleSup">10</span></a> The difference in the incidence of ARF according to RIFLE and AKIN was circumscribed to the intermediate and severe cases of ARF&#44; since the proportion of patients with mild ARF was similar according to both RIFLE and AKIN&#46; On the other hand&#44; there were patients classified as having ARF according to the RIFLE system but not according to the AKIN classification&#44; and vice versa&#46; This suggested that the use of both systems would increase the capacity to detect ARF&#44; as was effectively confirmed by the results obtained&#46;</p><p id="par0185" class="elsevierStylePara elsevierViewall">On comparing the RIFLE and AKIN classifications&#44; the differences can only be attributed to the C criterion&#44; since the U criterion has the same cutoff points in both systems&#46; The weaknesses of using plasma creatinine for the diagnosis of ARF have been widely commented in the literature&#46; In the case of the RIFLE system&#44; the C criterion is based on comparison of the actual MPC of the patient with the BPC intended to represent &#8220;ideal creatinine&#8221;&#44; and is estimated according to the MDRD formula&#46; The latter has been validated only in patients who are stable &#40;an uncommon circumstance in the critically ill&#41;&#44; and ignores the nonlinear relationship between the creatinine levels and the glomerular filtration rate &#40;GFR&#41;&#46; Moreover&#44; this formula includes information which is not usually reliable in the ICU&#58; the patient weight is often not known or is altered as a consequence of losses or increments in body water&#44; in the same way as the creatinine distribution volume&#46; On the other hand&#44; the formula also contemplates an arbitrary &#8220;normal&#8221; estimated GFR of 75<span class="elsevierStyleHsp" style=""></span>ml&#47;min&#47;m<span class="elsevierStyleSup">2</span>&#44; when in fact this value may differ widely among normal individuals with different dietetic habits or with different renal functional reserves&#46;<a class="elsevierStyleCrossRefs" href="#bib0015"><span class="elsevierStyleSup">3&#44;12</span></a> The MDRD formula likewise does not take into account the changes in MPC due to non-renal causes&#44; as in patients with diminished muscle mass or impaired liver function&#46; All these factors question the usefulness of BPC in the RIFLE classification&#46; In the case of the AKIN system&#44; comparison is made of the actual MPC with the MPC value of the previous 48<span class="elsevierStyleHsp" style=""></span>h&#46; Here the previous creatinine value is not calculated but measured&#8211;suggesting that the results could be more reliable than in the case of the RIFLE system&#46; However&#44; a patient may have an already elevated previous MPC if ARF developed days before determination of the value&#44; and consequently comparison of the two MPC values would be unable to detect ARF&#46; Thus&#44; analysis of the changes in creatinine is questioned in both methods&#44; and discussion focuses on which of the two is more reliable&#46; Since there is no gold standard for defining ARF&#44; the specificity of the two methods cannot be compared&#46; However&#44; as suggested by Bellomo in 2004&#44;<a class="elsevierStyleCrossRef" href="#bib0015"><span class="elsevierStyleSup">3</span></a> the importance of the definition of ARF does not seem to center on whether it is &#8220;correct&#8221; or &#8220;reliable&#8221;&#44; but on its usefulness&#46; We thus consider that the most useful method should be that capable of detecting a larger number of cases of ARF with the purpose of adopting preventive or early management measures&#44; despite the consequent incidence of false-positive results&#46;</p><p id="par0190" class="elsevierStylePara elsevierViewall">If we assume that the most useful method is that able to detect a larger number of patients with ARF&#44; then the RIFLE system would be more useful than the AKIN classification&#46; In turn&#44; the use of RIFLE and AKIN simultaneously in one same patient would prove more useful than RIFLE alone&#46;</p><p id="par0195" class="elsevierStylePara elsevierViewall">In our study&#44; the U criterion detected a larger number of patients with ARF than the C criterion&#44; and was therefore more effective&#46; This increased sensitivity of the U criterion could be explained by the fact that we stratified the patients in an hourly manner &#40;according to a calculated hourly diuresis&#41;&#44; in contrast to creatinine&#44; which requires a new value after 24<span class="elsevierStyleHsp" style=""></span>h in the case of the RIFLE system or after 48<span class="elsevierStyleHsp" style=""></span>h in the AKIN classification&#46;</p><p id="par0200" class="elsevierStylePara elsevierViewall">In our experience there was great variation in the way of monitoring diuresis in the different participating centers&#44; and the literature likewise describes a lack of uniformity in the way this parameter is determined&#46; On the other hand&#44; when the urinary tract is not catheterized it is not possible to record the urine produced every hour&#8211;theoretically making it impossible to apply the U criterion recommended by consensus in such patients who&#44; although perhaps in a less critical condition&#44; are not free from risk of developing ARF&#46; For these reasons we decided to implement calculated hourly diuresis &#40;CHD&#41;&#44; making it possible to apply the RIFLE and AKIN systems with greater precision and obtain comparable results in all patients&#44; i&#46;e&#46;&#44; with or without urinary catheterization&#46;</p><p id="par0205" class="elsevierStylePara elsevierViewall">Since diuresis was evaluated in ml&#47;day&#44; the sensitivity in diagnosing ARF was 66&#46;7&#37; and 62&#46;8&#37; in relation to RIFLE and AKIN&#44; respectively&#59; in other words&#44; daily diuresis as an isolated value is of scant diagnostic utility&#46; However&#44; the decrease in hourly urine output showed a good correlation to the presence of ARF and to more severe grades of the disease&#46; The diuresis&#47;time ratio therefore could be regarded as having prognostic value&#46;</p><p id="par0210" class="elsevierStylePara elsevierViewall">The increase in the values of MPC among the patients with ARF was not correlated to progressing severity of ARF when using the AKIN system&#44; though a correlation was observed in the case of the RIFLE classification&#46; Here we must remember that the creatinine data were registered daily in the RIFLE system versus once every 48<span class="elsevierStyleHsp" style=""></span>h in the AKIN system&#59; as a result&#44; we can assume that increases in MPC have prognostic value when creatinine is measured at least once every 24<span class="elsevierStyleHsp" style=""></span>h&#46; On the other hand&#44; the isolated MPC values showed a sensitivity of 75&#46;5&#37; and 59&#46;9&#37; in relation to RIFLE and AKIN&#44; respectively&#44; i&#46;e&#46;&#44; their diagnostic value is poor&#46;</p><p id="par0215" class="elsevierStylePara elsevierViewall">In coincidence with the published data&#44; our mortality rates were significantly higher among the patients with ARF than in the patients without ARF&#44; on applying both the RIFLE and the AKIN classification&#8211;higher rates being associated to increased severity of the disease&#46; The results were similar on stratifying the patients according to the U criterion or C criterion separately&#46; The larger proportion of deaths recorded among non-surgical patients is also consistent with the findings in the literature&#46;</p><p id="par0220" class="elsevierStylePara elsevierViewall">In agreement with the observations of other authors&#44; our data showed patients with ARF to be older&#44; with a larger number of previous disease conditions&#44; and with higher BMI values and APACHE <span class="elsevierStyleSmallCaps">II</span> and SOFA scores than patients without ARF&#46; There were no significant differences with respect to patient sex or days of stay in the ICU&#46; Furthermore&#44; we found the highest incidence of ARF to correspond to non-surgical patients&#46;</p></span><span id="sec0065" class="elsevierStyleSection elsevierViewall"><span class="elsevierStyleSectionTitle" id="sect0155">Conclusions</span><p id="par0225" class="elsevierStylePara elsevierViewall">Since there is no gold standard for knowing the true sensitivity and specificity of the RIFLE and AKIN systems&#44; comparative assessment should aim to establish which of the two systems is more useful for improving the outcome in critically ill patients&#46;</p><p id="par0230" class="elsevierStylePara elsevierViewall">The literature continues to present data that are difficult to compare&#44; despite the consensus-based definitions&#46; Perhaps the incidences of ARF reported in the literature would have been greater if strict application of the U criterion had been observed&#46;</p><p id="par0235" class="elsevierStylePara elsevierViewall">Despite the recommendations&#44; it remains unclear how diuresis should be measured&#44; particularly in patients without catheterization of the urinary tract&#46; In our experience&#44; CHD allowed application of the urinary criterion in a standardized manner in all patients&#44; independently of the diuresis monitoring intervals and the presence or absence of a bladder catheter&#46; We therefore recommend its use in this context&#46;</p><p id="par0240" class="elsevierStylePara elsevierViewall">We feel the originality of our study to be fundamentally attributable to the fact of having applied the U criterion exactly as recommended by consensus&#44; in contrast to most studies in which insufficient or absent diuresis information constituted an acknowledged weak point&#46;</p></span><span id="sec0070" class="elsevierStyleSection elsevierViewall"><span class="elsevierStyleSectionTitle" id="sect0160">Conflicts of interest</span><p id="par0245" class="elsevierStylePara elsevierViewall">The authors declare that they have no conflicts of interest&#46;</p></span></span>"
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            1 => array:2 [
              "identificador" => "sec0020"
              "titulo" => "Data collection and analysis"
            ]
            2 => array:2 [
              "identificador" => "sec0025"
              "titulo" => "Acute renal failure according to urinary criterion &#40;ARF-U&#41;"
            ]
            3 => array:2 [
              "identificador" => "sec0030"
              "titulo" => "Acute renal failure according to creatinine criterion &#40;ARF-C&#41;"
            ]
            4 => array:2 [
              "identificador" => "sec0035"
              "titulo" => "Acute renal failure according to both criteria &#40;ARF-UC&#41;"
            ]
          ]
        ]
        6 => array:3 [
          "identificador" => "sec0040"
          "titulo" => "Results"
          "secciones" => array:3 [
            0 => array:2 [
              "identificador" => "sec0045"
              "titulo" => "Sample characteristics"
            ]
            1 => array:2 [
              "identificador" => "sec0050"
              "titulo" => "Incidence of acute renal failure"
            ]
            2 => array:2 [
              "identificador" => "sec0055"
              "titulo" => "Mortality"
            ]
          ]
        ]
        7 => array:2 [
          "identificador" => "sec0060"
          "titulo" => "Discussion"
        ]
        8 => array:2 [
          "identificador" => "sec0065"
          "titulo" => "Conclusions"
        ]
        9 => array:2 [
          "identificador" => "sec0070"
          "titulo" => "Conflicts of interest"
        ]
        10 => array:1 [
          "titulo" => "References"
        ]
      ]
    ]
    "pdfFichero" => "main.pdf"
    "tienePdf" => true
    "fechaRecibido" => "2012-11-15"
    "fechaAceptado" => "2013-04-15"
    "PalabrasClave" => array:2 [
      "en" => array:1 [
        0 => array:4 [
          "clase" => "keyword"
          "titulo" => "Keywords"
          "identificador" => "xpalclavsec327347"
          "palabras" => array:3 [
            0 => "Acute renal failure"
            1 => "RIFLE"
            2 => "AKIN"
          ]
        ]
      ]
      "es" => array:1 [
        0 => array:4 [
          "clase" => "keyword"
          "titulo" => "Palabras clave"
          "identificador" => "xpalclavsec327348"
          "palabras" => array:5 [
            0 => "Insuficiencia renal aguda"
            1 => "RIFLE"
            2 => "AKIN"
            3 => "Criterio urinario"
            4 => "Criterio creatinina"
          ]
        ]
      ]
    ]
    "tieneResumen" => true
    "resumen" => array:2 [
      "en" => array:2 [
        "titulo" => "Abstract"
        "resumen" => "<span class="elsevierStyleSectionTitle" id="sect0010">Objective</span><p id="spar0005" class="elsevierStyleSimplePara elsevierViewall">To determine the incidence of acute renal failure &#40;ARF&#41; in critically ill patients using the RIFLE and AKIN criteria&#46;</p> <span class="elsevierStyleSectionTitle" id="sect0015">Design</span><p id="spar0010" class="elsevierStyleSimplePara elsevierViewall">A prospective&#44; multicenter observational study with a duration of one year from February 2010 was carried out&#46; RIFLE and AKIN were employed using the urinary &#40;UC&#41; and creatinine criteria &#40;CC&#41; jointly and separately&#46;</p> <span class="elsevierStyleSectionTitle" id="sect0020">Scope</span><p id="spar0015" class="elsevierStyleSimplePara elsevierViewall">Nine polyvalent Critical Care Units &#40;CCUs&#41; in Argentina&#46;</p> <span class="elsevierStyleSectionTitle" id="sect0025">Patients</span><p id="spar0020" class="elsevierStyleSimplePara elsevierViewall">A total of 627 critical patients over 18 years of age were admitted to the CCU for more than 48<span class="elsevierStyleHsp" style=""></span>h&#46; Exclusion criteria&#58; inability to quantify diuresis&#44; surgical instrumentation of the urinary tract&#44; and need for renal support therapy &#40;RST&#41;&#46;</p> <span class="elsevierStyleSectionTitle" id="sect0030">Variables of interest</span><p id="spar0025" class="elsevierStyleSimplePara elsevierViewall">Calculated hourly diuresis &#40;CHD&#41; was used to apply the UC&#46;</p> <span class="elsevierStyleSectionTitle" id="sect0035">Results</span><p id="spar0030" class="elsevierStyleSimplePara elsevierViewall">The incidence of ARF was 69&#46;4&#37; and 51&#46;8&#37; according to RIFLE and AKIN&#44; respectively&#46; UC detected ARF in 59&#46;5&#37; of cases&#44; while CC identified ARF in 34&#46;7&#37; &#40;RIFLE&#41; and 25&#46;3&#37; &#40;AKIN&#41;&#46; The mortality rate was 40&#46;9&#37; and 44&#46;6&#37; according to RIFLE and AKIN respectively&#44; was significantly higher than in patients without ARF&#44; and increased with disease severity &#40;Data processing&#58; Excel&#44; SQL and SPSS&#46; Levene test&#44; comparison of means with Student t and chi-squared&#44; with 95&#37; confidence interval&#41;&#46;</p> <span class="elsevierStyleSectionTitle" id="sect0040">Conclusions</span><p id="spar0035" class="elsevierStyleSimplePara elsevierViewall">RIFLE identified more cases of ARF&#46; UC proved more effective than CC&#46; The presence of ARF and severity levels were correlated to mortality but not to days of stay in the CCU&#46; Implementation of the unified CHD was useful for implementing UC and achieving comparable results&#46;</p>"
      ]
      "es" => array:2 [
        "titulo" => "Resumen"
        "resumen" => "<span class="elsevierStyleSectionTitle" id="sect0050">Objetivo</span><p id="spar0040" class="elsevierStyleSimplePara elsevierViewall">Determinar la incidencia de insuficiencia renal aguda &#40;IRA&#41; en pacientes cr&#237;ticos usando RIFLE y AKIN&#46;</p> <span class="elsevierStyleSectionTitle" id="sect0055">Dise&#241;o</span><p id="spar0045" class="elsevierStyleSimplePara elsevierViewall">Estudio observacional prospectivo multic&#233;ntrico&#44; realizado durante un a&#241;o desde febrero de 2010&#46; Se emplearon RIFLE y AKIN aplicando los criterios urinario &#40;criterio U&#41; y creatinina &#40;criterio <span class="elsevierStyleSmallCaps">C</span>&#41; juntos y separados&#46;</p> <span class="elsevierStyleSectionTitle" id="sect0060">&#193;mbito</span><p id="spar0050" class="elsevierStyleSimplePara elsevierViewall">Nueve Unidades de Cuidados Cr&#237;ticos &#40;UCC&#41; polivalentes de Argentina&#46;</p> <span class="elsevierStyleSectionTitle" id="sect0065">Pacientes</span><p id="spar0055" class="elsevierStyleSimplePara elsevierViewall">Un total de 627 pacientes cr&#237;ticos mayores de 18 a&#241;os de edad internados en UCC durante m&#225;s de 48 h&#59; motivos de exclusi&#243;n&#58; imposibilidad de cuantificar diuresis&#44; instrumentaci&#243;n quir&#250;rgica de la v&#237;a urinaria y necesidad de terapias de soporte renal &#40;TSR&#41;&#46;</p> <span class="elsevierStyleSectionTitle" id="sect0070">Variables de inter&#233;s</span><p id="spar0060" class="elsevierStyleSimplePara elsevierViewall">Se utiliz&#243; una diuresis horaria calculada &#40;DHC&#41; para aplicar el criterio U&#46;</p> <span class="elsevierStyleSectionTitle" id="sect0075">Resultados</span><p id="spar0065" class="elsevierStyleSimplePara elsevierViewall">La incidencia de IRA fue de 69&#44;4 y 51&#44;8&#37; &#40;RIFLE y AKIN&#44; respectivamente&#41;&#46; El criterio U detect&#243; IRA en el 59&#44;5&#37; de los casos&#44; mientras que el criterio C identific&#243; IRA en el 34&#44;7&#37; &#40;RIFLE&#41; y 25&#44;3&#37; &#40;AKIN&#41;&#46; La mortalidad fue de 40&#44;9 y 44&#44;6&#37; seg&#250;n RIFLE y AKIN&#44; respectivamente&#44; significativamente mayor a la de los pacientes sin IRA&#44; y aument&#243; con la gravedad de la enfermedad&#46; &#40;Procesamiento de datos&#58; Excel&#44; SQL y SPSS&#46; Test de Levenne&#44; comparaci&#243;n de medias&#47;promedios con t de Student y chi-cuadrado&#44; con 95&#37; de confianza&#41;&#46;</p> <span class="elsevierStyleSectionTitle" id="sect0080">Conclusiones</span><p id="spar0070" class="elsevierStyleSimplePara elsevierViewall">RIFLE identific&#243; m&#225;s casos de IRA que AKIN&#46; El criterio U fue m&#225;s eficaz que el criterio C&#46; La presencia de IRA y sus niveles de gravedad tuvieron correlaci&#243;n con la mortalidad pero no con los d&#237;as de estancia en UCC&#46; La implementaci&#243;n de la DHC fue &#250;til para unificar la aplicaci&#243;n del criterio C y lograr resultados comparables&#46;</p>"
      ]
    ]
    "NotaPie" => array:1 [
      0 => array:2 [
        "etiqueta" => "&#9734;"
        "nota" => "<p class="elsevierStyleNotepara" id="npar0005">Please cite this article as&#58; Salgado G&#44; Landa M&#44; Masevicius D&#44; Gianassi S&#44; San-Rom&#225;n JE&#44; Silva L&#44; et al&#46; Insuficiencia renal aguda seg&#250;n RIFLE y AKIN&#58; estudio multic&#233;ntrico&#46; Med Intensiva&#46; 2014&#59;38&#58;271&#8211;277&#46;</p>"
      ]
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        "tabla" => array:2 [
          "leyenda" => "<p id="spar0105" class="elsevierStyleSimplePara elsevierViewall">CABA&#58; Ciudad Aut&#243;noma de Buenos Aires&#59; Other centers&#58; Instituto Ecuatoriano de Seguridad Social &#40;IESS&#41; de Portoviejo&#44; Manav&#237;&#44; Ecuador&#59; Hospital Pablo Soria de San Salvador de Jujuy&#44; Argentina&#59; Hospital Municipal Ram&#243;n Santamarina de Tandil&#44; Buenos Aires&#44; Argentina&#59; Hospital Municipal Agudos Le&#243;nidas Lucero de Bah&#237;a Blanca&#44; Buenos Aires&#44; Argentina&#46;</p>"
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                0 => """
                  <table border="0" frame="\n
                  \t\t\t\t\tvoid\n
                  \t\t\t\t" class=""><thead title="thead"><tr title="table-row"><td class="td" title="\n
                  \t\t\t\t\ttable-head\n
                  \t\t\t\t  " align="" valign="\n
                  \t\t\t\t\ttop\n
                  \t\t\t\t" style="border-bottom: 2px solid black">&nbsp;\t\t\t\t\t\t\n
                  \t\t\t\t</td><td class="td" title="\n
                  \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" style="border-bottom: 2px solid black">No&#46; of beds&nbsp;\t\t\t\t\t\t\n
                  \t\t\t\t</td><td class="td" title="\n
                  \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" style="border-bottom: 2px solid black">No&#46; of cases&nbsp;\t\t\t\t\t\t\n
                  \t\t\t\t</td></tr></thead><tbody title="tbody"><tr title="table-row"><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">Hospital Emilio Ferreyra Necochea&#44; Buenos Aires&#44; Argentina&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="char" valign="\n
                  \t\t\t\t\ttop\n
                  \t\t\t\t">6&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="char" valign="\n
                  \t\t\t\t\ttop\n
                  \t\t\t\t">67&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  " align="left" valign="\n
                  \t\t\t\t\ttop\n
                  \t\t\t\t">Sanatorio Otamendi&#44; CABA&#44; Buenos Aires&#44; Argentina&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="char" valign="\n
                  \t\t\t\t\ttop\n
                  \t\t\t\t">16&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="char" valign="\n
                  \t\t\t\t\ttop\n
                  \t\t\t\t">73&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  " align="left" valign="\n
                  \t\t\t\t\ttop\n
                  \t\t\t\t">Hospital Italiano&#44; CABA&#44; Buenos Aires&#44; Argentina&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="char" valign="\n
                  \t\t\t\t\ttop\n
                  \t\t\t\t">28&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="char" valign="\n
                  \t\t\t\t\ttop\n
                  \t\t\t\t">197&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  " align="left" valign="\n
                  \t\t\t\t\ttop\n
                  \t\t\t\t">Sanatorio Nuestra Se&#241;ora del Rosario&#44; San Salvador Jujuy&#44; Argentina&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="char" valign="\n
                  \t\t\t\t\ttop\n
                  \t\t\t\t">12&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="char" valign="\n
                  \t\t\t\t\ttop\n
                  \t\t\t\t">160&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  " align="left" valign="\n
                  \t\t\t\t\ttop\n
                  \t\t\t\t">Other centers&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="char" valign="\n
                  \t\t\t\t\ttop\n
                  \t\t\t\t">31&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="char" valign="\n
                  \t\t\t\t\ttop\n
                  \t\t\t\t">55&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="3" 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  " align="left" valign="\n
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                  \t\t\t\t">Total&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="char" valign="\n
                  \t\t\t\t\ttop\n
                  \t\t\t\t">124&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="char" valign="\n
                  \t\t\t\t\ttop\n
                  \t\t\t\t">627&nbsp;\t\t\t\t\t\t\n
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        "descripcion" => array:1 [
          "en" => "<p id="spar0100" class="elsevierStyleSimplePara elsevierViewall">Centers participating in the study&#46;</p>"
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        "etiqueta" => "Table 2"
        "tipo" => "MULTIMEDIATABLA"
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        "mostrarDisplay" => false
        "tabla" => array:1 [
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              "tabla" => array:1 [
                0 => """
                  <table border="0" frame="\n
                  \t\t\t\t\tvoid\n
                  \t\t\t\t" class=""><thead title="thead"><tr title="table-row"><td class="td" title="\n
                  \t\t\t\t\ttable-head\n
                  \t\t\t\t  " align="" valign="\n
                  \t\t\t\t\ttop\n
                  \t\t\t\t" style="border-bottom: 2px solid black">&nbsp;\t\t\t\t\t\t\n
                  \t\t\t\t</td><td class="td" title="\n
                  \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" style="border-bottom: 2px solid black">No&#46; of patients&nbsp;\t\t\t\t\t\t\n
                  \t\t\t\t</td><td class="td" title="\n
                  \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" style="border-bottom: 2px solid black">Urinary criterion&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" style="border-bottom: 2px solid black">RIFLE total &#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-head\n
                  \t\t\t\t  " align="left" valign="\n
                  \t\t\t\t\ttop\n
                  \t\t\t\t" style="border-bottom: 2px solid black">RIFLE R &#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-head\n
                  \t\t\t\t  " align="left" valign="\n
                  \t\t\t\t\ttop\n
                  \t\t\t\t" style="border-bottom: 2px solid black">RIFLE <span class="elsevierStyleSmallCaps">I &#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-head\n
                  \t\t\t\t  " align="left" valign="\n
                  \t\t\t\t\ttop\n
                  \t\t\t\t" style="border-bottom: 2px solid black">RIFLE F &#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-head\n
                  \t\t\t\t  " align="left" valign="\n
                  \t\t\t\t\ttop\n
                  \t\t\t\t" style="border-bottom: 2px solid black">AKIN total &#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-head\n
                  \t\t\t\t  " align="left" valign="\n
                  \t\t\t\t\ttop\n
                  \t\t\t\t" style="border-bottom: 2px solid black">AKIN 1 &#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-head\n
                  \t\t\t\t  " align="left" valign="\n
                  \t\t\t\t\ttop\n
                  \t\t\t\t" style="border-bottom: 2px solid black">AKIN 2 &#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-head\n
                  \t\t\t\t  " align="left" valign="\n
                  \t\t\t\t\ttop\n
                  \t\t\t\t" style="border-bottom: 2px solid black">AKIN 3 &#40;&#37;&#41;&nbsp;\t\t\t\t\t\t\n
                  \t\t\t\t</td></tr></thead><tbody title="tbody"><tr title="table-row"><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">Bagshaw&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="char" valign="\n
                  \t\t\t\t\ttop\n
                  \t\t\t\t">120&#44;123&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
                  \t\t\t\t\ttop\n
                  \t\t\t\t">Yes&#44; 24<span class="elsevierStyleHsp" style=""></span>h&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">36&#46;10&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">16&#46;20&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">13&#46;60&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</td><td class="td" title="\n
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                  \t\t\t\t  " align="char" valign="\n
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                  \t\t\t\t">37&#46;10&nbsp;\t\t\t\t\t\t\n
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                  \t\t\t\t  " align="char" valign="\n
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                  \t\t\t\t">18&#46;10&nbsp;\t\t\t\t\t\t\n
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                  \t\t\t\t  " align="char" valign="\n
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                  \t\t\t\t">10&#46;10&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="char" valign="\n
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                  \t\t\t\t">8&#46;90&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">Johannidis&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="char" valign="\n
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                  \t\t\t\t">6784&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">Yes&#44; 24<span class="elsevierStyleHsp" style=""></span>h&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="char" valign="\n
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                  \t\t\t\t">35&#46;50&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="char" valign="\n
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                  \t\t\t\t">7&#46;60&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="char" valign="\n
                  \t\t\t\t\ttop\n
                  \t\t\t\t">11&#46;10&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="char" valign="\n
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                  \t\t\t\t">16&#46;80&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="char" valign="\n
                  \t\t\t\t\ttop\n
                  \t\t\t\t">28&#46;50&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="char" valign="\n
                  \t\t\t\t\ttop\n
                  \t\t\t\t">7&#46;40&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="char" valign="\n
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                  \t\t\t\t">7&#46;20&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="char" valign="\n
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                  \t\t\t\t">13&#46;80&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  " align="left" valign="\n
                  \t\t\t\t\ttop\n
                  \t\t\t\t">Osterman et al&#46;&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="char" valign="\n
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                  \t\t\t\t">22&#44;303&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">No&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="char" valign="\n
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                  \t\t\t\t">&#8211;&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="char" valign="\n
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                  \t\t\t\t">&#8211;&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="char" valign="\n
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                  \t\t\t\t">&#8211;&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="char" valign="\n
                  \t\t\t\t\ttop\n
                  \t\t\t\t">&#8211;&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="char" valign="\n
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                  \t\t\t\t</td><td class="td" title="\n
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                  \t\t\t\t</td><td class="td" title="\n
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                  \t\t\t\t  " align="char" valign="\n
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                  \t\t\t\t</td><td class="td" title="\n
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                  \t\t\t\t  " align="char" valign="\n
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                  \t\t\t\t">12&#46;50&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">Our data&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="char" valign="\n
                  \t\t\t\t\ttop\n
                  \t\t\t\t">627&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">Yes&#44; hourly&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="char" valign="\n
                  \t\t\t\t\ttop\n
                  \t\t\t\t">69&#46;40&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="char" valign="\n
                  \t\t\t\t\ttop\n
                  \t\t\t\t">44&#46;20&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="char" valign="\n
                  \t\t\t\t\ttop\n
                  \t\t\t\t">38&#46;30&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="char" valign="\n
                  \t\t\t\t\ttop\n
                  \t\t\t\t">17&#46;50&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="char" valign="\n
                  \t\t\t\t\ttop\n
                  \t\t\t\t">51&#46;80&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</td><td class="td" title="\n
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                  \t\t\t\t  " align="char" valign="\n
                  \t\t\t\t\ttop\n
                  \t\t\t\t">28&#46;30&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="char" valign="\n
                  \t\t\t\t\ttop\n
                  \t\t\t\t">11&#46;70&nbsp;\t\t\t\t\t\t\n
                  \t\t\t\t</td></tr></tbody></table>
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          "en" => "<p id="spar0110" class="elsevierStyleSimplePara elsevierViewall">Incidence of acute renal failure according to the literature&#46;</p>"
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                            0 => "B&#46;K&#46; Novis"
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Acute renal failure according to the RIFLE and AKIN criteria: A multicenter study
Insuficiencia renal aguda según RIFLE y AKIN: estudio multicéntrico
G. Salgadoa,
Corresponding author
, M. Landaa, D. Maseviciusb, S. Gianassic, J.E. San-Románc, L. Silvad, M. Gimeneze, O. Tejerinaf, P. Díaz-Cisnerosg, F. Cicciolih, J.L. do Picoa
a Hospital E. Ferreyra de Necochea, Buenos Aires, Argentina
b Sanatorio Otamendi, Ciudad Autónoma de Buenos Aires, Argentina
c Hospital Italiano de Buenos Aires, Ciudad Autónoma de Buenos Aires, Argentina
d Sanatorio Nuestra Señora del Rosario, Jujuy, Argentina
e Clínica de los Virreyes, Ciudad Autónoma de Buenos Aires, Argentina
f Hospital Pablo Soria, Jujuy, Argentina
g Hospital Ramón Santamarina de Tandil, Buenos Aires, Argentina
h Hospital Leónidas Lucero de Bahía Blanca, Buenos Aires, Argentina
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        "titulo" => "Insuficiencia renal aguda seg&#250;n RIFLE y AKIN&#58; estudio multic&#233;ntrico"
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          "en" => "<p id="spar0075" class="elsevierStyleSimplePara elsevierViewall">Acute renal failure according to the AKIN and RIFLE classifications&#44; and both classifications jointly&#46;</p>"
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    "textoCompleto" => "<span class="elsevierStyleSections"><span id="sec0005" class="elsevierStyleSection elsevierViewall"><span class="elsevierStyleSectionTitle" id="sect0095">Introduction</span><p id="par0005" class="elsevierStylePara elsevierViewall">There have been great difficulties for decades in defining the syndrome which we now refer to as acute renal failure &#40;ARF&#41;&#46; The inconvenience of not having a single definition was first addressed by a review in which 28 studies published in the period between 1965 and 1989<a class="elsevierStyleCrossRef" href="#bib0005"><span class="elsevierStyleSup">1</span></a> were seen to have used different criteria for diagnosing the condition&#46;</p><p id="par0010" class="elsevierStylePara elsevierViewall">In the year 2001&#44; Bellomo&#44; Kellum and Ronco<a class="elsevierStyleCrossRef" href="#bib0010"><span class="elsevierStyleSup">2</span></a> proposed unification of the definition of ARF&#44; and considered that only two of the multiple functions of the kidneys&#8211;urine production and the excretion of waste products of nitrogen metabolism&#8211;are easily and routinely determined in all Intensive Care Units &#40;ICUs&#41;&#46;<a class="elsevierStyleCrossRef" href="#bib0015"><span class="elsevierStyleSup">3</span></a> Accordingly&#44; in 2004 the Second International Consensus Conference of the Acute Dialysis Quality Initiative &#40;ADQI&#41;<a class="elsevierStyleCrossRef" href="#bib0020"><span class="elsevierStyleSup">4</span></a> proposed the diagnosis and stratification of ARF according to the RIFLE classification&#44; contemplating three levels or stages of acute renal dysfunction &#40;&#8220;risk&#8221;&#44; &#8220;injury&#8221; and &#8220;failure&#8221;&#41; according to the changes in plasma creatinine levels or urine output&#46;</p><p id="par0015" class="elsevierStylePara elsevierViewall">The validity of this approach and its capacity to predict mortality have been evaluated by a number of studies&#46; Ricci et al&#46;&#44;<a class="elsevierStyleCrossRef" href="#bib0025"><span class="elsevierStyleSup">5</span></a> in a systematic review of all the studies using the RIFLE criteria between 2004 and 2007&#44; identified 24 articles &#40;with over 71&#44;000 patients&#41; that were scantly comparable among each other and moreover had clear weaknesses&#58; small sample sizes&#44; heterogeneous populations &#40;healthy subjects&#44; severe burn victims&#44; bone marrow transplant patients&#44; heart surgery patients&#44; liver transplant patients&#44; etc&#46;&#41;&#44; or participation of a single institution &#40;single-center studies&#41;&#46; Not surprisingly&#44; the review reported an extremely variable incidence of ARF &#40;10&#8211;82&#37;&#41;&#46;</p><p id="par0020" class="elsevierStylePara elsevierViewall">The results of a second consensus conference with the participation of representative specialists in Critical Care Medicine and Nephrology &#40;the Acute Kidney Injury Network&#41; were published in 2007&#44;<a class="elsevierStyleCrossRef" href="#bib0030"><span class="elsevierStyleSup">6</span></a> and proposed the AKIN classification with the purpose of improving the sensitivity and specificity of the RIFLE system&#46;</p><p id="par0025" class="elsevierStylePara elsevierViewall">Large studies have evaluated both systems&#46; In 2008&#44; Bagshaw et al&#46;<a class="elsevierStyleCrossRef" href="#bib0035"><span class="elsevierStyleSup">7</span></a> published the results of the analysis of a database containing over 120&#44;000 patients&#44; comparing the RIFLE and AKIN systems&#46; The incidence of ARF was 36&#46;1&#37; and 37&#46;1&#37;&#44; respectively&#44; and despite the weaknesses&#44; the authors concluded that AKIN does not offer advantages in terms of sensitivity&#44; consistency or predictive capacity with respect to RIFLE&#46;</p><p id="par0030" class="elsevierStylePara elsevierViewall">In 2008&#44; Osterman et al&#46;<a class="elsevierStyleCrossRef" href="#bib0040"><span class="elsevierStyleSup">8</span></a> applied the AKIN classification in 22&#44;300 patients&#44; recording an incidence of ARF of 35&#46;4&#37; and a good correlation between the severity of ARF and the prognosis&#8211;though only the most severe disease grade was identified as an independent mortality predictor&#46; In 2009&#44; Joannidis et al&#46;<a class="elsevierStyleCrossRef" href="#bib0045"><span class="elsevierStyleSup">9</span></a> published a comparison of the RIFLE versus the AKIN system in 14&#44;300 patients&#44; based on the data of the SAPS-3&#46; The incidence of ARF was found to be 28&#46;5&#37; and 38&#46;5&#37;&#44; respectively&#44; and the RIFLE classification showed greater consistency and a high ARF detection rate&#46; However&#44; the lack of urine output information biased the results&#44; since AKIN grades 1 and 2&#44; and RIFLE grades I and F&#44; could not be differentiated&#46; Both of the mentioned studies demonstrated an increase in morbidity-mortality associated to the development of ARF&#46;</p><p id="par0035" class="elsevierStylePara elsevierViewall">The recommendations of an international consensus conference held in Canada in 2007<a class="elsevierStyleCrossRef" href="#bib0050"><span class="elsevierStyleSup">10</span></a> with the purpose of establishing guidelines for the prevention and management of ARF in critical patients were published in 2010&#46; The mentioned consensus document considered cystatin C to be a promising marker that appears to detect ARF earlier than changes in plasma creatinine&#46; However&#44; both this and other biomarkers &#40;NGAL&#44; kidney injury molecule-1&#44; interleukin-18&#41; are still in the investigational stages&#46; It therefore was concluded that plasma creatinine remains the main marker &#40;despite the disadvantages related to the influence of body weight&#44; catabolic status&#44; the presence of rhabdomyolysis&#44; dilutional effects and drugs or other substances that alter creatinine secretion&#41;&#44; along with the measurement of diuresis&#46; The document thus recommends the RIFLE and AKIN criteria for diagnosing ARF&#44; and points out that although validation is still needed&#44; the AKIN system is able to identify ARF earlier than the RIFLE classification&#46;</p><p id="par0040" class="elsevierStylePara elsevierViewall">The present study analyzes the incidence of ARF in different ICUs&#44; using the RIFLE and AKIN criteria applied in strict compliance with the consensus definitions&#44; and compares the usefulness of both systems in predicting mortality and duration of stay in the ICU&#46;</p></span><span id="sec0010" class="elsevierStyleSection elsevierViewall"><span class="elsevierStyleSectionTitle" id="sect0100">Patients and methods</span><span id="sec0015" class="elsevierStyleSection elsevierViewall"><span class="elsevierStyleSectionTitle" id="sect0105">Study population</span><p id="par0045" class="elsevierStylePara elsevierViewall">A prospective study of 627 patients from 9 polyvalent ICUs was carried out between February 2010 and February 2011 &#40;<a class="elsevierStyleCrossRef" href="#tbl0005">Table 1</a>&#41;&#46; The study was approved by the Ethics Committee of each participating center&#46;</p><elsevierMultimedia ident="tbl0005"></elsevierMultimedia><p id="par0050" class="elsevierStylePara elsevierViewall">The study included patients over 18 years of age admitted to the ICU for at least 48<span class="elsevierStyleHsp" style=""></span>h&#44; with evaluation during the first 7 days of admission&#46; The exclusion criteria were&#58; inability to quantify diuresis at any time during the study period&#44; surgical instrumentation of the urinary tract &#40;cystostomy&#44; nephrostomy&#44; urinary fistulas&#44; etc&#46;&#41;&#44; and the need for renal support therapy &#40;RST&#41;&#8211;whether de novo &#40;RIFLE &#8220;loss&#8221; and &#8220;end&#8221; stages&#41; or chronic&#46;</p></span><span id="sec0020" class="elsevierStyleSection elsevierViewall"><span class="elsevierStyleSectionTitle" id="sect0110">Data collection and analysis</span><p id="par0055" class="elsevierStylePara elsevierViewall">Microsoft Excel was used for data collection&#44; with recording of the following parameters&#58; age&#44; sex&#44; ethnic origin&#44; current body weight &#40;reported by the patient or relatives&#41;&#44; height&#44; body mass index &#40;BMI&#41;&#44; the APACHE <span class="elsevierStyleSmallCaps">II</span> and SOFA scores upon admission&#44; disease leading to admission &#40;clinical or surgical&#41;&#44; days of stay in the ICU&#44; and mortality in the ICU and 30&#44; 60 and 90 days after discharge&#46; The APACHE <span class="elsevierStyleSmallCaps">II</span> and SOFA scores were calculated without excluding the creatinine parameters&#46;</p><p id="par0060" class="elsevierStylePara elsevierViewall">Urine collection was carried out in two ways depending on whether the patient carried a urinary catheter or not&#46; In patients without a catheter&#44; each micturition episode was quantified&#44; while urine was collected every two hours in the patients with a bladder catheter&#46; In both cases these amounts were used to calculate the hourly average from previous sampling&#46;</p><p id="par0065" class="elsevierStylePara elsevierViewall">In all cases hourly diuresis was expressed in relation to patient body weight&#44; yielding the calculated hourly diuresis &#40;CHD&#41; reported in ml&#47;kg&#47;h&#46; In all patients we recorded the daily measured plasma creatinine &#40;MPC&#41; value&#46;</p><p id="par0070" class="elsevierStylePara elsevierViewall">Based on the data referred to patient age&#44; sex&#44; ethnic origin and MPC&#44; the Modification of Diet in Renal Disease &#40;MDRD&#41; formula<a class="elsevierStyleCrossRef" href="#bib0055"><span class="elsevierStyleSup">11</span></a> was used to automatically calculate basal plasma creatinine &#40;BPC&#41;&#44; defined as the ideal creatinine value of the patient&#44; assuming a normal glomerular filtration rate &#40;GFR&#41; of 75<span class="elsevierStyleHsp" style=""></span>ml&#47;min&#47;1&#46;73<span class="elsevierStyleHsp" style=""></span>m<span class="elsevierStyleSup">2</span>&#44; and assigning a theoretical normal BPC for each age&#44; sex and ethnic group&#46;</p><p id="par0075" class="elsevierStylePara elsevierViewall">All the patients were evaluated by means of the RIFLE and AKIN systems &#40;<a class="elsevierStyleCrossRefs" href="#tbl0005">Tables 1 and 2</a>&#41;&#46; As established by consensus&#44; compliance with one or more of the urinary &#40;U&#41; and creatinine criteria &#40;C&#41; determined the diagnosis of ARF &#40;ARF-UC&#41;&#46; In addition&#44; both criteria were evaluated separately&#46;</p></span><span id="sec0025" class="elsevierStyleSection elsevierViewall"><span class="elsevierStyleSectionTitle" id="sect0115">Acute renal failure according to urinary criterion &#40;ARF-U&#41;</span><p id="par0080" class="elsevierStylePara elsevierViewall">Based on CHD&#44; we identified the cases that met the U criterion before the C criterion&#44; during a continuous period of 6&#44; 12 and 24 hours&#46; In this way the patients were simultaneously stratified according to RIFLE and AKIN every hour and during the 7 days of study into one of the four possible grades&#46; For RIFLE&#58; RIFLE zero &#40;without ARF&#41;&#44; R &#40;risk&#41;&#44; <span class="elsevierStyleSmallCaps">I</span> &#40;injury&#41; and F &#40;failure&#41;&#46; For AKIN&#58; AKIN 0&#44; AKIN 1&#44; AKIN 2 and AKIN 3&#46; Based on these hourly results referred to RIFLE and AKIN&#44; the program detected the most severe grade of ARF for each day of study&#44; with the obtainment of a daily stratification of ARF only according to the U criterion as established by RIFLE and AKIN&#46;</p></span><span id="sec0030" class="elsevierStyleSection elsevierViewall"><span class="elsevierStyleSectionTitle" id="sect0120">Acute renal failure according to creatinine criterion &#40;ARF-C&#41;</span><p id="par0085" class="elsevierStylePara elsevierViewall">Based on the MPC and BPC registries&#44; we identified those cases that first met the C criterion before the U criterion&#44; on a daily basis&#46; In the case of the RIFLE system&#44; we considered the daily increments in MPC with respect to BPC&#44; stratifying the patients only according to the C criterion&#46; For RIFLE&#58; zero&#44; R&#44; <span class="elsevierStyleSmallCaps">I</span> and F&#46; For AKIN we considered the increases in MPC with respect to MPC in the previous 48<span class="elsevierStyleHsp" style=""></span>h&#46; Accordingly&#44; the registry of ARF was only obtained on days 3&#44; 5 and 7 of the study&#44; yielding one of the four possible grades&#58; AKIN zero&#44; AKIN 1&#44; AKIN 2 and AKIN 3&#46;</p></span><span id="sec0035" class="elsevierStyleSection elsevierViewall"><span class="elsevierStyleSectionTitle" id="sect0125">Acute renal failure according to both criteria &#40;ARF-UC&#41;</span><p id="par0090" class="elsevierStylePara elsevierViewall">The patients meeting the U and C criteria simultaneously were identified and stratified into four possible ARF levels referred to both the RIFLE and the AKIN classification&#46;</p><p id="par0095" class="elsevierStylePara elsevierViewall">Neither volemia nor prior fluid therapy was considered&#46;</p><p id="par0100" class="elsevierStylePara elsevierViewall">The analysis of the selected variables was made using a program that generated an SQL database with the collected registries&#46; The database in turn was processed using the Statistical Package for the Social Sciences &#40;SPSS&#41;&#46;</p><p id="par0105" class="elsevierStylePara elsevierViewall">The homogeneity of the variables was controlled using the Levene test&#46; The Student <span class="elsevierStyleItalic">t</span>-test for the comparison of means was used to detect significant differences between the participating institutions&#46; In the case of patient sex&#44; we assessed differences in the proportion of females between institutions based on the chi-squared test&#46; A 95&#37; confidence level was considered for all the statistical tests&#46;</p></span></span><span id="sec0040" class="elsevierStyleSection elsevierViewall"><span class="elsevierStyleSectionTitle" id="sect0130">Results</span><span id="sec0045" class="elsevierStyleSection elsevierViewall"><span class="elsevierStyleSectionTitle" id="sect0135">Sample characteristics</span><p id="par0110" class="elsevierStylePara elsevierViewall">The mean values of the different characteristics of the global study sample &#40;n<span class="elsevierStyleHsp" style=""></span>&#61;<span class="elsevierStyleHsp" style=""></span>627&#41; were&#58; age 62 years &#40;range 18&#8211;97&#41;&#59; 63&#37; males and 37&#37; females&#59; BMI 26&#46;4<span class="elsevierStyleHsp" style=""></span>kg&#47;m<span class="elsevierStyleSup">2</span> &#40;range 12&#46;4&#8211;70&#46;3&#41;&#59; days of stay 13&#46;6&#59; APACHE score 15&#59; SOFA score 5&#59; 27&#46;6&#37; postsurgery cases &#40;elective surgery 16&#46;4&#37;&#59; emergency surgery 11&#46;2&#37;&#41;&#46;</p></span><span id="sec0050" class="elsevierStyleSection elsevierViewall"><span class="elsevierStyleSectionTitle" id="sect0140">Incidence of acute renal failure</span><p id="par0115" class="elsevierStylePara elsevierViewall">A total of 69&#46;4&#37; and 51&#46;8&#37; of the patients presented some grade of ARF according to the RIFLE and AKIN classification&#44; respectively &#40;<a class="elsevierStyleCrossRef" href="#fig0005">Fig&#46; 1</a>&#41;&#46;</p><elsevierMultimedia ident="fig0005"></elsevierMultimedia><p id="par0120" class="elsevierStylePara elsevierViewall">Most of the patients with ARF presented the mildest grade of renal failure &#40;RIFLE R&#58; 30&#46;6&#37; and AKIN 1&#58; 31&#46;1&#37;&#41;&#44; though RIFLE detected a larger number of patients with intermediate and severe grade ARF &#40;26&#46;6&#37; and 12&#46;1&#37;&#44; respectively&#41; than AKIN &#40;14&#46;7&#37; and 6&#46;1&#37;&#44; respectively&#41;&#46;</p><p id="par0125" class="elsevierStylePara elsevierViewall">A total of 8&#46;7&#37; of the patients classified as presenting ARF according to RIFLE did not have ARF according to AKIN&#44; while 9&#46;8&#37; of the patients with ARF according to AKIN did not have ARF according to RIFLE&#46; On the other hand&#44; a larger number of cases of ARF were detected on applying both classifications jointly &#40;467 patients&#41; than on applying only RIFLE &#40;435 patients&#41; or only AKIN &#40;325 patients&#41; &#40;<a class="elsevierStyleCrossRef" href="#fig0005">Fig&#46; 1</a>&#41;&#46;</p><p id="par0130" class="elsevierStylePara elsevierViewall">On examining the data only according to the U criterion&#44; the results were seen to be the same for RIFLE and AKIN&#44; since both systems had identical cutoff points in the consensus&#46; A total of 59&#46;5&#37; of the cases of ARF complied with the U criterion before they complied with the C criterion&#44; exhibiting no significant differences versus compliance with both criteria simultaneously&#46; In contrast&#44; the cases of ARF that first complied with the C criterion were fewer in number than the cases that complied with both criteria simultaneously&#58; 34&#46;7&#37; for RIFLE and 25&#46;3&#37; for AKIN &#40;<a class="elsevierStyleCrossRef" href="#fig0010">Fig&#46; 2</a>&#41;&#46;</p><elsevierMultimedia ident="fig0010"></elsevierMultimedia><p id="par0135" class="elsevierStylePara elsevierViewall">There were no significant differences regarding the days of stay in the ICU &#40;mean 14 days&#41; between the patients with and without ARF&#44; as evaluated by both the RIFLE and the AKIN classification&#46;</p><p id="par0140" class="elsevierStylePara elsevierViewall">The patients with ARF according to RIFLE were significantly older than those without ARF according to RIFLE&#46; Moreover&#44; older age was associated to increased severity&#46; A similar tendency was observed in the patients evaluated with the AKIN system&#44; though in this case the values failed to reach statistical significance&#46; Neither classification showed significant differences in the incidence of ARF with respect to patient sex&#59; however&#44; on only evaluating the U criterion&#44; the proportion of males was seen to increase with increasing severity of ARF&#44; with both the RIFLE and the AKIN system&#46; On the other hand&#44; BMI was significantly greater &#40;mean 27<span class="elsevierStyleHsp" style=""></span>kg&#47;m<span class="elsevierStyleSup">2</span>&#41; in the patients with ARF&#46; The APACHE <span class="elsevierStyleSmallCaps">II</span> and SOFA scores increased significantly with increasing severity of ARF&#44; with both the RIFLE and the AKIN system&#46; Most of the patients with ARF were non-surgical cases&#46; Only 34 patients required RST &#40;intermittent daily hemodialysis in 31 cases&#44; and continuous RST in 3 cases&#41;&#44; based on the following indications&#58; anuria&#44; acidosis&#44; volume overload&#44; refractory shock&#44; progressive plasma creatinine elevation and hyperpotassemia&#46;</p><p id="par0145" class="elsevierStylePara elsevierViewall">Daily diuresis among the patients without ARF was 2268<span class="elsevierStyleHsp" style=""></span>ml&#47;day with RIFLE and 2109<span class="elsevierStyleHsp" style=""></span>ml&#47;day in the case of AKIN&#46; The corresponding values were lower in the patients with ARF&#44; with significantly lesser values in situations of increasing severity&#46; However&#44; on evaluating the sensitivity of daily diuresis in detecting patients with ARF&#44; the area under the receiver operating characteristic &#40;ROC&#41; curve was found to be 66&#46;7&#37; for RIFLE and 62&#46;8&#37; for AKIN&#44; i&#46;e&#46;&#44; sensitivity was low&#46; In turn&#44; on evaluating the patients only with the U criterion&#44; daily diuresis decreased significantly with increasing risk of ARF&#46; Those patients without ARF presented a higher mean value &#40;2177<span class="elsevierStyleHsp" style=""></span>ml&#47;day&#41;&#44; which proved significant with respect to all grades of ARF&#46;</p><p id="par0150" class="elsevierStylePara elsevierViewall">The MPC of the patients without ARF according to the RIFLE classification was 0&#46;77<span class="elsevierStyleHsp" style=""></span>mg&#47;dl&#44; versus 1&#46;01<span class="elsevierStyleHsp" style=""></span>mg&#47;dl in those without ARF according to the AKIN system&#46; The MPC values were higher in the patients with ARF according to RIFLE&#44; and increased significantly with increasing severity&#46; The correlation between MPC and the presence of ARF and its severity was not observed in the patients stratified according to the AKIN system&#46; On the other hand&#44; MPC among the patients evaluated only according to the U criterion was also significantly higher in the more severe cases&#46; However&#44; on evaluating the sensitivity of MPC in detecting ARF&#44; the area of the ROC curve for RIFLE was 75&#46;5&#37;&#44; versus 59&#46;9&#37; in the case of AKIN&#46;</p></span><span id="sec0055" class="elsevierStyleSection elsevierViewall"><span class="elsevierStyleSectionTitle" id="sect0145">Mortality</span><p id="par0155" class="elsevierStylePara elsevierViewall">Global mortality &#40;mortality in the ICU and up to 90 days after discharge&#41; was 40&#46;9&#37; and 44&#46;6&#37; among the patients with ARF according to the RIFLE and ARF classification&#44; respectively&#44; and was significantly higher than among the patients without ARF &#40;19&#46;79&#37; and 23&#46;5&#37; according to RIFLE and AKIN&#44; respectively&#41;&#46; These values were similar to those obtained when the diagnosis of ARF was established based only on the C criterion &#40;ARF-C&#58; 49&#46;08&#37; and 51&#46;7&#37; according to RIFLE and AKIN&#44; respectively&#41; or only on the U criterion &#40;ARF-U&#58; 41&#46;82&#37; according to both RIFLE and AKIN&#41;&#46; The proportion of deaths increased significantly with increasing severity of ARF &#40;<a class="elsevierStyleCrossRef" href="#fig0015">Fig&#46; 3</a>&#41;&#46; The most severe grade of ARF was associated to markedly higher mortality rates &#40;71&#46;1&#37; and 61&#46;8&#37; according to AKIN and RIFLE&#44; respectively&#41;&#46;</p><elsevierMultimedia ident="fig0015"></elsevierMultimedia><p id="par0160" class="elsevierStylePara elsevierViewall">According to the AKIN classification&#44; the mortality rate of the most severe grade of ARF was significantly higher than in the case of mild or moderate ARF&#46; In the case of the RIFLE system&#44; the mortality rates corresponding to moderate and severe ARF were considerably higher than in the case of mild ARF or patients without ARF&#46; The largest proportion of deaths was recorded in the ICU&#44; in both the patients without ARF and in those of ARF of any grade of severity&#46;</p><p id="par0165" class="elsevierStylePara elsevierViewall">The mortality rate was higher in subjects with non-surgical conditions &#40;46&#46;56&#37; and 50&#46;40&#37;&#44; respectively&#41; than in surgical cases &#40;28&#46;69&#37; and 34&#46;56&#37;&#44; respectively&#41; among the patients with ARF according to both the RIFLE and the AKIN classification &#40;<a class="elsevierStyleCrossRef" href="#fig0020">Fig&#46; 4</a>&#41;&#46;</p><elsevierMultimedia ident="fig0020"></elsevierMultimedia><p id="par0170" class="elsevierStylePara elsevierViewall">The mortality relative risk increased progressively with increasing severity of ARF among the patients stratified according to both the RIFLE and the AKIN classification &#40;<a class="elsevierStyleCrossRef" href="#fig0025">Fig&#46; 5</a>&#41;&#46;</p><elsevierMultimedia ident="fig0025"></elsevierMultimedia></span></span><span id="sec0060" class="elsevierStyleSection elsevierViewall"><span class="elsevierStyleSectionTitle" id="sect0150">Discussion</span><p id="par0175" class="elsevierStylePara elsevierViewall">According to our results&#44; the incidence of ARF was greater than in the large studies published in the literature&#44; on applying both the RIFLE system and the AKIN classification &#40;<a class="elsevierStyleCrossRef" href="#tbl0010">Table 2</a>&#41;&#46; This increased incidence was observed for all grades of severity&#46;</p><elsevierMultimedia ident="tbl0010"></elsevierMultimedia><p id="par0180" class="elsevierStylePara elsevierViewall">The RIFLE system classified a larger number of patients with ARF than the AKIN classification&#44; in contrast to the observations of Brochard&#46;<a class="elsevierStyleCrossRef" href="#bib0050"><span class="elsevierStyleSup">10</span></a> The difference in the incidence of ARF according to RIFLE and AKIN was circumscribed to the intermediate and severe cases of ARF&#44; since the proportion of patients with mild ARF was similar according to both RIFLE and AKIN&#46; On the other hand&#44; there were patients classified as having ARF according to the RIFLE system but not according to the AKIN classification&#44; and vice versa&#46; This suggested that the use of both systems would increase the capacity to detect ARF&#44; as was effectively confirmed by the results obtained&#46;</p><p id="par0185" class="elsevierStylePara elsevierViewall">On comparing the RIFLE and AKIN classifications&#44; the differences can only be attributed to the C criterion&#44; since the U criterion has the same cutoff points in both systems&#46; The weaknesses of using plasma creatinine for the diagnosis of ARF have been widely commented in the literature&#46; In the case of the RIFLE system&#44; the C criterion is based on comparison of the actual MPC of the patient with the BPC intended to represent &#8220;ideal creatinine&#8221;&#44; and is estimated according to the MDRD formula&#46; The latter has been validated only in patients who are stable &#40;an uncommon circumstance in the critically ill&#41;&#44; and ignores the nonlinear relationship between the creatinine levels and the glomerular filtration rate &#40;GFR&#41;&#46; Moreover&#44; this formula includes information which is not usually reliable in the ICU&#58; the patient weight is often not known or is altered as a consequence of losses or increments in body water&#44; in the same way as the creatinine distribution volume&#46; On the other hand&#44; the formula also contemplates an arbitrary &#8220;normal&#8221; estimated GFR of 75<span class="elsevierStyleHsp" style=""></span>ml&#47;min&#47;m<span class="elsevierStyleSup">2</span>&#44; when in fact this value may differ widely among normal individuals with different dietetic habits or with different renal functional reserves&#46;<a class="elsevierStyleCrossRefs" href="#bib0015"><span class="elsevierStyleSup">3&#44;12</span></a> The MDRD formula likewise does not take into account the changes in MPC due to non-renal causes&#44; as in patients with diminished muscle mass or impaired liver function&#46; All these factors question the usefulness of BPC in the RIFLE classification&#46; In the case of the AKIN system&#44; comparison is made of the actual MPC with the MPC value of the previous 48<span class="elsevierStyleHsp" style=""></span>h&#46; Here the previous creatinine value is not calculated but measured&#8211;suggesting that the results could be more reliable than in the case of the RIFLE system&#46; However&#44; a patient may have an already elevated previous MPC if ARF developed days before determination of the value&#44; and consequently comparison of the two MPC values would be unable to detect ARF&#46; Thus&#44; analysis of the changes in creatinine is questioned in both methods&#44; and discussion focuses on which of the two is more reliable&#46; Since there is no gold standard for defining ARF&#44; the specificity of the two methods cannot be compared&#46; However&#44; as suggested by Bellomo in 2004&#44;<a class="elsevierStyleCrossRef" href="#bib0015"><span class="elsevierStyleSup">3</span></a> the importance of the definition of ARF does not seem to center on whether it is &#8220;correct&#8221; or &#8220;reliable&#8221;&#44; but on its usefulness&#46; We thus consider that the most useful method should be that capable of detecting a larger number of cases of ARF with the purpose of adopting preventive or early management measures&#44; despite the consequent incidence of false-positive results&#46;</p><p id="par0190" class="elsevierStylePara elsevierViewall">If we assume that the most useful method is that able to detect a larger number of patients with ARF&#44; then the RIFLE system would be more useful than the AKIN classification&#46; In turn&#44; the use of RIFLE and AKIN simultaneously in one same patient would prove more useful than RIFLE alone&#46;</p><p id="par0195" class="elsevierStylePara elsevierViewall">In our study&#44; the U criterion detected a larger number of patients with ARF than the C criterion&#44; and was therefore more effective&#46; This increased sensitivity of the U criterion could be explained by the fact that we stratified the patients in an hourly manner &#40;according to a calculated hourly diuresis&#41;&#44; in contrast to creatinine&#44; which requires a new value after 24<span class="elsevierStyleHsp" style=""></span>h in the case of the RIFLE system or after 48<span class="elsevierStyleHsp" style=""></span>h in the AKIN classification&#46;</p><p id="par0200" class="elsevierStylePara elsevierViewall">In our experience there was great variation in the way of monitoring diuresis in the different participating centers&#44; and the literature likewise describes a lack of uniformity in the way this parameter is determined&#46; On the other hand&#44; when the urinary tract is not catheterized it is not possible to record the urine produced every hour&#8211;theoretically making it impossible to apply the U criterion recommended by consensus in such patients who&#44; although perhaps in a less critical condition&#44; are not free from risk of developing ARF&#46; For these reasons we decided to implement calculated hourly diuresis &#40;CHD&#41;&#44; making it possible to apply the RIFLE and AKIN systems with greater precision and obtain comparable results in all patients&#44; i&#46;e&#46;&#44; with or without urinary catheterization&#46;</p><p id="par0205" class="elsevierStylePara elsevierViewall">Since diuresis was evaluated in ml&#47;day&#44; the sensitivity in diagnosing ARF was 66&#46;7&#37; and 62&#46;8&#37; in relation to RIFLE and AKIN&#44; respectively&#59; in other words&#44; daily diuresis as an isolated value is of scant diagnostic utility&#46; However&#44; the decrease in hourly urine output showed a good correlation to the presence of ARF and to more severe grades of the disease&#46; The diuresis&#47;time ratio therefore could be regarded as having prognostic value&#46;</p><p id="par0210" class="elsevierStylePara elsevierViewall">The increase in the values of MPC among the patients with ARF was not correlated to progressing severity of ARF when using the AKIN system&#44; though a correlation was observed in the case of the RIFLE classification&#46; Here we must remember that the creatinine data were registered daily in the RIFLE system versus once every 48<span class="elsevierStyleHsp" style=""></span>h in the AKIN system&#59; as a result&#44; we can assume that increases in MPC have prognostic value when creatinine is measured at least once every 24<span class="elsevierStyleHsp" style=""></span>h&#46; On the other hand&#44; the isolated MPC values showed a sensitivity of 75&#46;5&#37; and 59&#46;9&#37; in relation to RIFLE and AKIN&#44; respectively&#44; i&#46;e&#46;&#44; their diagnostic value is poor&#46;</p><p id="par0215" class="elsevierStylePara elsevierViewall">In coincidence with the published data&#44; our mortality rates were significantly higher among the patients with ARF than in the patients without ARF&#44; on applying both the RIFLE and the AKIN classification&#8211;higher rates being associated to increased severity of the disease&#46; The results were similar on stratifying the patients according to the U criterion or C criterion separately&#46; The larger proportion of deaths recorded among non-surgical patients is also consistent with the findings in the literature&#46;</p><p id="par0220" class="elsevierStylePara elsevierViewall">In agreement with the observations of other authors&#44; our data showed patients with ARF to be older&#44; with a larger number of previous disease conditions&#44; and with higher BMI values and APACHE <span class="elsevierStyleSmallCaps">II</span> and SOFA scores than patients without ARF&#46; There were no significant differences with respect to patient sex or days of stay in the ICU&#46; Furthermore&#44; we found the highest incidence of ARF to correspond to non-surgical patients&#46;</p></span><span id="sec0065" class="elsevierStyleSection elsevierViewall"><span class="elsevierStyleSectionTitle" id="sect0155">Conclusions</span><p id="par0225" class="elsevierStylePara elsevierViewall">Since there is no gold standard for knowing the true sensitivity and specificity of the RIFLE and AKIN systems&#44; comparative assessment should aim to establish which of the two systems is more useful for improving the outcome in critically ill patients&#46;</p><p id="par0230" class="elsevierStylePara elsevierViewall">The literature continues to present data that are difficult to compare&#44; despite the consensus-based definitions&#46; Perhaps the incidences of ARF reported in the literature would have been greater if strict application of the U criterion had been observed&#46;</p><p id="par0235" class="elsevierStylePara elsevierViewall">Despite the recommendations&#44; it remains unclear how diuresis should be measured&#44; particularly in patients without catheterization of the urinary tract&#46; In our experience&#44; CHD allowed application of the urinary criterion in a standardized manner in all patients&#44; independently of the diuresis monitoring intervals and the presence or absence of a bladder catheter&#46; We therefore recommend its use in this context&#46;</p><p id="par0240" class="elsevierStylePara elsevierViewall">We feel the originality of our study to be fundamentally attributable to the fact of having applied the U criterion exactly as recommended by consensus&#44; in contrast to most studies in which insufficient or absent diuresis information constituted an acknowledged weak point&#46;</p></span><span id="sec0070" class="elsevierStyleSection elsevierViewall"><span class="elsevierStyleSectionTitle" id="sect0160">Conflicts of interest</span><p id="par0245" class="elsevierStylePara elsevierViewall">The authors declare that they have no conflicts of interest&#46;</p></span></span>"
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            1 => "Objective"
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          "titulo" => array:8 [
            0 => "Resumen"
            1 => "Objetivo"
            2 => "Dise&#241;o"
            3 => "&#193;mbito"
            4 => "Pacientes"
            5 => "Variables de inter&#233;s"
            6 => "Resultados"
            7 => "Conclusiones"
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          "titulo" => "Introduction"
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          "titulo" => "Patients and methods"
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              "titulo" => "Acute renal failure according to urinary criterion &#40;ARF-U&#41;"
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              "identificador" => "sec0030"
              "titulo" => "Acute renal failure according to creatinine criterion &#40;ARF-C&#41;"
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              "titulo" => "Acute renal failure according to both criteria &#40;ARF-UC&#41;"
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          "titulo" => "Results"
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              "titulo" => "Incidence of acute renal failure"
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              "titulo" => "Mortality"
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          "titulo" => "Discussion"
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    "fechaRecibido" => "2012-11-15"
    "fechaAceptado" => "2013-04-15"
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            0 => "Acute renal failure"
            1 => "RIFLE"
            2 => "AKIN"
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            0 => "Insuficiencia renal aguda"
            1 => "RIFLE"
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        "resumen" => "<span class="elsevierStyleSectionTitle" id="sect0010">Objective</span><p id="spar0005" class="elsevierStyleSimplePara elsevierViewall">To determine the incidence of acute renal failure &#40;ARF&#41; in critically ill patients using the RIFLE and AKIN criteria&#46;</p> <span class="elsevierStyleSectionTitle" id="sect0015">Design</span><p id="spar0010" class="elsevierStyleSimplePara elsevierViewall">A prospective&#44; multicenter observational study with a duration of one year from February 2010 was carried out&#46; RIFLE and AKIN were employed using the urinary &#40;UC&#41; and creatinine criteria &#40;CC&#41; jointly and separately&#46;</p> <span class="elsevierStyleSectionTitle" id="sect0020">Scope</span><p id="spar0015" class="elsevierStyleSimplePara elsevierViewall">Nine polyvalent Critical Care Units &#40;CCUs&#41; in Argentina&#46;</p> <span class="elsevierStyleSectionTitle" id="sect0025">Patients</span><p id="spar0020" class="elsevierStyleSimplePara elsevierViewall">A total of 627 critical patients over 18 years of age were admitted to the CCU for more than 48<span class="elsevierStyleHsp" style=""></span>h&#46; Exclusion criteria&#58; inability to quantify diuresis&#44; surgical instrumentation of the urinary tract&#44; and need for renal support therapy &#40;RST&#41;&#46;</p> <span class="elsevierStyleSectionTitle" id="sect0030">Variables of interest</span><p id="spar0025" class="elsevierStyleSimplePara elsevierViewall">Calculated hourly diuresis &#40;CHD&#41; was used to apply the UC&#46;</p> <span class="elsevierStyleSectionTitle" id="sect0035">Results</span><p id="spar0030" class="elsevierStyleSimplePara elsevierViewall">The incidence of ARF was 69&#46;4&#37; and 51&#46;8&#37; according to RIFLE and AKIN&#44; respectively&#46; UC detected ARF in 59&#46;5&#37; of cases&#44; while CC identified ARF in 34&#46;7&#37; &#40;RIFLE&#41; and 25&#46;3&#37; &#40;AKIN&#41;&#46; The mortality rate was 40&#46;9&#37; and 44&#46;6&#37; according to RIFLE and AKIN respectively&#44; was significantly higher than in patients without ARF&#44; and increased with disease severity &#40;Data processing&#58; Excel&#44; SQL and SPSS&#46; Levene test&#44; comparison of means with Student t and chi-squared&#44; with 95&#37; confidence interval&#41;&#46;</p> <span class="elsevierStyleSectionTitle" id="sect0040">Conclusions</span><p id="spar0035" class="elsevierStyleSimplePara elsevierViewall">RIFLE identified more cases of ARF&#46; UC proved more effective than CC&#46; The presence of ARF and severity levels were correlated to mortality but not to days of stay in the CCU&#46; Implementation of the unified CHD was useful for implementing UC and achieving comparable results&#46;</p>"
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        "resumen" => "<span class="elsevierStyleSectionTitle" id="sect0050">Objetivo</span><p id="spar0040" class="elsevierStyleSimplePara elsevierViewall">Determinar la incidencia de insuficiencia renal aguda &#40;IRA&#41; en pacientes cr&#237;ticos usando RIFLE y AKIN&#46;</p> <span class="elsevierStyleSectionTitle" id="sect0055">Dise&#241;o</span><p id="spar0045" class="elsevierStyleSimplePara elsevierViewall">Estudio observacional prospectivo multic&#233;ntrico&#44; realizado durante un a&#241;o desde febrero de 2010&#46; Se emplearon RIFLE y AKIN aplicando los criterios urinario &#40;criterio U&#41; y creatinina &#40;criterio <span class="elsevierStyleSmallCaps">C</span>&#41; juntos y separados&#46;</p> <span class="elsevierStyleSectionTitle" id="sect0060">&#193;mbito</span><p id="spar0050" class="elsevierStyleSimplePara elsevierViewall">Nueve Unidades de Cuidados Cr&#237;ticos &#40;UCC&#41; polivalentes de Argentina&#46;</p> <span class="elsevierStyleSectionTitle" id="sect0065">Pacientes</span><p id="spar0055" class="elsevierStyleSimplePara elsevierViewall">Un total de 627 pacientes cr&#237;ticos mayores de 18 a&#241;os de edad internados en UCC durante m&#225;s de 48 h&#59; motivos de exclusi&#243;n&#58; imposibilidad de cuantificar diuresis&#44; instrumentaci&#243;n quir&#250;rgica de la v&#237;a urinaria y necesidad de terapias de soporte renal &#40;TSR&#41;&#46;</p> <span class="elsevierStyleSectionTitle" id="sect0070">Variables de inter&#233;s</span><p id="spar0060" class="elsevierStyleSimplePara elsevierViewall">Se utiliz&#243; una diuresis horaria calculada &#40;DHC&#41; para aplicar el criterio U&#46;</p> <span class="elsevierStyleSectionTitle" id="sect0075">Resultados</span><p id="spar0065" class="elsevierStyleSimplePara elsevierViewall">La incidencia de IRA fue de 69&#44;4 y 51&#44;8&#37; &#40;RIFLE y AKIN&#44; respectivamente&#41;&#46; El criterio U detect&#243; IRA en el 59&#44;5&#37; de los casos&#44; mientras que el criterio C identific&#243; IRA en el 34&#44;7&#37; &#40;RIFLE&#41; y 25&#44;3&#37; &#40;AKIN&#41;&#46; La mortalidad fue de 40&#44;9 y 44&#44;6&#37; seg&#250;n RIFLE y AKIN&#44; respectivamente&#44; significativamente mayor a la de los pacientes sin IRA&#44; y aument&#243; con la gravedad de la enfermedad&#46; &#40;Procesamiento de datos&#58; Excel&#44; SQL y SPSS&#46; Test de Levenne&#44; comparaci&#243;n de medias&#47;promedios con t de Student y chi-cuadrado&#44; con 95&#37; de confianza&#41;&#46;</p> <span class="elsevierStyleSectionTitle" id="sect0080">Conclusiones</span><p id="spar0070" class="elsevierStyleSimplePara elsevierViewall">RIFLE identific&#243; m&#225;s casos de IRA que AKIN&#46; El criterio U fue m&#225;s eficaz que el criterio C&#46; La presencia de IRA y sus niveles de gravedad tuvieron correlaci&#243;n con la mortalidad pero no con los d&#237;as de estancia en UCC&#46; La implementaci&#243;n de la DHC fue &#250;til para unificar la aplicaci&#243;n del criterio C y lograr resultados comparables&#46;</p>"
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        "nota" => "<p class="elsevierStyleNotepara" id="npar0005">Please cite this article as&#58; Salgado G&#44; Landa M&#44; Masevicius D&#44; Gianassi S&#44; San-Rom&#225;n JE&#44; Silva L&#44; et al&#46; Insuficiencia renal aguda seg&#250;n RIFLE y AKIN&#58; estudio multic&#233;ntrico&#46; Med Intensiva&#46; 2014&#59;38&#58;271&#8211;277&#46;</p>"
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          "leyenda" => "<p id="spar0105" class="elsevierStyleSimplePara elsevierViewall">CABA&#58; Ciudad Aut&#243;noma de Buenos Aires&#59; Other centers&#58; Instituto Ecuatoriano de Seguridad Social &#40;IESS&#41; de Portoviejo&#44; Manav&#237;&#44; Ecuador&#59; Hospital Pablo Soria de San Salvador de Jujuy&#44; Argentina&#59; Hospital Municipal Ram&#243;n Santamarina de Tandil&#44; Buenos Aires&#44; Argentina&#59; Hospital Municipal Agudos Le&#243;nidas Lucero de Bah&#237;a Blanca&#44; Buenos Aires&#44; Argentina&#46;</p>"
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                  \t\t\t\t\ttop\n
                  \t\t\t\t" style="border-bottom: 2px solid black">No&#46; of beds&nbsp;\t\t\t\t\t\t\n
                  \t\t\t\t</td><td class="td" title="\n
                  \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" style="border-bottom: 2px solid black">No&#46; of cases&nbsp;\t\t\t\t\t\t\n
                  \t\t\t\t</td></tr></thead><tbody title="tbody"><tr title="table-row"><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">Hospital Emilio Ferreyra Necochea&#44; Buenos Aires&#44; Argentina&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="char" valign="\n
                  \t\t\t\t\ttop\n
                  \t\t\t\t">6&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="char" valign="\n
                  \t\t\t\t\ttop\n
                  \t\t\t\t">67&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  " align="left" valign="\n
                  \t\t\t\t\ttop\n
                  \t\t\t\t">Sanatorio Otamendi&#44; CABA&#44; Buenos Aires&#44; Argentina&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="char" valign="\n
                  \t\t\t\t\ttop\n
                  \t\t\t\t">16&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="char" valign="\n
                  \t\t\t\t\ttop\n
                  \t\t\t\t">73&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  " align="left" valign="\n
                  \t\t\t\t\ttop\n
                  \t\t\t\t">Hospital Italiano&#44; CABA&#44; Buenos Aires&#44; Argentina&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="char" valign="\n
                  \t\t\t\t\ttop\n
                  \t\t\t\t">28&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="char" valign="\n
                  \t\t\t\t\ttop\n
                  \t\t\t\t">197&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  " align="left" valign="\n
                  \t\t\t\t\ttop\n
                  \t\t\t\t">Sanatorio Nuestra Se&#241;ora del Rosario&#44; San Salvador Jujuy&#44; Argentina&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="char" valign="\n
                  \t\t\t\t\ttop\n
                  \t\t\t\t">12&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="char" valign="\n
                  \t\t\t\t\ttop\n
                  \t\t\t\t">160&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  " align="left" valign="\n
                  \t\t\t\t\ttop\n
                  \t\t\t\t">Other centers&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="char" valign="\n
                  \t\t\t\t\ttop\n
                  \t\t\t\t">31&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="char" valign="\n
                  \t\t\t\t\ttop\n
                  \t\t\t\t">55&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="3" 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  " align="left" valign="\n
                  \t\t\t\t\ttop\n
                  \t\t\t\t">Total&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="char" valign="\n
                  \t\t\t\t\ttop\n
                  \t\t\t\t">124&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="char" valign="\n
                  \t\t\t\t\ttop\n
                  \t\t\t\t">627&nbsp;\t\t\t\t\t\t\n
                  \t\t\t\t</td></tr></tbody></table>
                  """
              ]
              "imagenFichero" => array:1 [
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          "en" => "<p id="spar0100" class="elsevierStyleSimplePara elsevierViewall">Centers participating in the study&#46;</p>"
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      6 => array:7 [
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                0 => """
                  <table border="0" frame="\n
                  \t\t\t\t\tvoid\n
                  \t\t\t\t" class=""><thead title="thead"><tr title="table-row"><td class="td" title="\n
                  \t\t\t\t\ttable-head\n
                  \t\t\t\t  " align="" valign="\n
                  \t\t\t\t\ttop\n
                  \t\t\t\t" style="border-bottom: 2px solid black">&nbsp;\t\t\t\t\t\t\n
                  \t\t\t\t</td><td class="td" title="\n
                  \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" style="border-bottom: 2px solid black">No&#46; of patients&nbsp;\t\t\t\t\t\t\n
                  \t\t\t\t</td><td class="td" title="\n
                  \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" style="border-bottom: 2px solid black">Urinary criterion&nbsp;\t\t\t\t\t\t\n
                  \t\t\t\t</td><td class="td" title="\n
                  \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" style="border-bottom: 2px solid black">RIFLE total &#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-head\n
                  \t\t\t\t  " align="left" valign="\n
                  \t\t\t\t\ttop\n
                  \t\t\t\t" style="border-bottom: 2px solid black">RIFLE R &#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-head\n
                  \t\t\t\t  " align="left" valign="\n
                  \t\t\t\t\ttop\n
                  \t\t\t\t" style="border-bottom: 2px solid black">RIFLE <span class="elsevierStyleSmallCaps">I &#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-head\n
                  \t\t\t\t  " align="left" valign="\n
                  \t\t\t\t\ttop\n
                  \t\t\t\t" style="border-bottom: 2px solid black">RIFLE F &#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-head\n
                  \t\t\t\t  " align="left" valign="\n
                  \t\t\t\t\ttop\n
                  \t\t\t\t" style="border-bottom: 2px solid black">AKIN total &#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-head\n
                  \t\t\t\t  " align="left" valign="\n
                  \t\t\t\t\ttop\n
                  \t\t\t\t" style="border-bottom: 2px solid black">AKIN 1 &#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-head\n
                  \t\t\t\t  " align="left" valign="\n
                  \t\t\t\t\ttop\n
                  \t\t\t\t" style="border-bottom: 2px solid black">AKIN 2 &#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-head\n
                  \t\t\t\t  " align="left" valign="\n
                  \t\t\t\t\ttop\n
                  \t\t\t\t" style="border-bottom: 2px solid black">AKIN 3 &#40;&#37;&#41;&nbsp;\t\t\t\t\t\t\n
                  \t\t\t\t</td></tr></thead><tbody title="tbody"><tr title="table-row"><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">Bagshaw&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="char" valign="\n
                  \t\t\t\t\ttop\n
                  \t\t\t\t">120&#44;123&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">Yes&#44; 24<span class="elsevierStyleHsp" style=""></span>h&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="char" valign="\n
                  \t\t\t\t\ttop\n
                  \t\t\t\t">36&#46;10&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="char" valign="\n
                  \t\t\t\t\ttop\n
                  \t\t\t\t">16&#46;20&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="char" valign="\n
                  \t\t\t\t\ttop\n
                  \t\t\t\t">13&#46;60&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="char" valign="\n
                  \t\t\t\t\ttop\n
                  \t\t\t\t">6&#46;30&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="char" valign="\n
                  \t\t\t\t\ttop\n
                  \t\t\t\t">37&#46;10&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="char" valign="\n
                  \t\t\t\t\ttop\n
                  \t\t\t\t">18&#46;10&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="char" valign="\n
                  \t\t\t\t\ttop\n
                  \t\t\t\t">10&#46;10&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="char" valign="\n
                  \t\t\t\t\ttop\n
                  \t\t\t\t">8&#46;90&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  " align="left" valign="\n
                  \t\t\t\t\ttop\n
                  \t\t\t\t">Johannidis&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="char" valign="\n
                  \t\t\t\t\ttop\n
                  \t\t\t\t">6784&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">Yes&#44; 24<span class="elsevierStyleHsp" style=""></span>h&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="char" valign="\n
                  \t\t\t\t\ttop\n
                  \t\t\t\t">35&#46;50&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="char" valign="\n
                  \t\t\t\t\ttop\n
                  \t\t\t\t">7&#46;60&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="char" valign="\n
                  \t\t\t\t\ttop\n
                  \t\t\t\t">11&#46;10&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="char" valign="\n
                  \t\t\t\t\ttop\n
                  \t\t\t\t">16&#46;80&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="char" valign="\n
                  \t\t\t\t\ttop\n
                  \t\t\t\t">28&#46;50&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="char" valign="\n
                  \t\t\t\t\ttop\n
                  \t\t\t\t">7&#46;40&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="char" valign="\n
                  \t\t\t\t\ttop\n
                  \t\t\t\t">7&#46;20&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="char" valign="\n
                  \t\t\t\t\ttop\n
                  \t\t\t\t">13&#46;80&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  " align="left" valign="\n
                  \t\t\t\t\ttop\n
                  \t\t\t\t">Osterman et al&#46;&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="char" valign="\n
                  \t\t\t\t\ttop\n
                  \t\t\t\t">22&#44;303&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">No&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="char" valign="\n
                  \t\t\t\t\ttop\n
                  \t\t\t\t">&#8211;&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="char" valign="\n
                  \t\t\t\t\ttop\n
                  \t\t\t\t">&#8211;&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="char" valign="\n
                  \t\t\t\t\ttop\n
                  \t\t\t\t">&#8211;&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="char" valign="\n
                  \t\t\t\t\ttop\n
                  \t\t\t\t">&#8211;&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="char" valign="\n
                  \t\t\t\t\ttop\n
                  \t\t\t\t">35&#46;40&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="char" valign="\n
                  \t\t\t\t\ttop\n
                  \t\t\t\t">19&#46;10&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="char" valign="\n
                  \t\t\t\t\ttop\n
                  \t\t\t\t">3&#46;80&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="char" valign="\n
                  \t\t\t\t\ttop\n
                  \t\t\t\t">12&#46;50&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  " align="left" valign="\n
                  \t\t\t\t\ttop\n
                  \t\t\t\t">Our data&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="char" valign="\n
                  \t\t\t\t\ttop\n
                  \t\t\t\t">627&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">Yes&#44; hourly&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="char" valign="\n
                  \t\t\t\t\ttop\n
                  \t\t\t\t">69&#46;40&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="char" valign="\n
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