title: Comparison of the RIFLE, AKIN and KDIGO criteria to predict mortality in critically ill patients.
abstract: OBJECTIVE
  Acute kidney injury is a common complication in critically ill patients, and the RIFLE, AKIN and KDIGO criteria are used to classify these patients. The present study's aim was to compare these criteria as predictors of mortality in critically ill patients.
  
  
  METHODS
  Prospective cohort study using medical records as the source of data. All patients admitted to the intensive care unit were included. The exclusion criteria were hospitalization for less than 24 hours and death. Patients were followed until discharge or death. Student's t test, chi-squared analysis, a multivariate logistic regression and ROC curves were used for the data analysis.
  
  
  RESULTS
  The mean patient age was 64 years old, and the majority of patients were women of African descent. According to RIFLE, the mortality rates were 17.74%, 22.58%, 24.19% and 35.48% for patients without acute kidney injury (AKI) in stages of Risk, Injury and Failure, respectively. For AKIN, the mortality rates were 17.74%, 29.03%, 12.90% and 40.32% for patients without AKI and at stage I, stage II and stage III, respectively. For KDIGO 2012, the mortality rates were 17.74%, 29.03%, 11.29% and 41.94% for patients without AKI and at stage I, stage II and stage III, respectively. All three classification systems showed similar ROC curves for mortality.
  
  
  CONCLUSIONS
  The RIFLE, AKIN and KDIGO criteria were good tools for predicting mortality in critically ill patients with no significant difference between them.
authors.affiliation: Universidade Estadual de Santa Cruz, Departamento de Clínica Médica, ItabunaBA, Brasil, Departamento de Clínica Médica, Universidade Estadual de Santa Cruz - UESC - Itabuna (BA), Brasil.
authors.forename: Talita Machado
authors.initials: TM
authors.lastname: Levi
authors.affiliation: Obras Assistenciais Irmã Dulce, Hospital Santo Antonio, Programa de Residência de Clínica Médica, SalvadorBA, Brasil, Programa de Residência de Clínica Médica, Hospital Santo Antonio, Obras Assistenciais Irmã Dulce - Salvador (BA), Brasil.
authors.forename: Sérgio Pinto
authors.initials: SP
authors.lastname: de Souza
authors.affiliation: Obras Assistenciais Irmã Dulce, Hospital Santo Antonio, Programa de Residência de Clínica Médica, SalvadorBA, Brasil, Programa de Residência de Clínica Médica, Hospital Santo Antonio, Obras Assistenciais Irmã Dulce - Salvador (BA), Brasil.
authors.forename: Janine Garcia
authors.initials: JG
authors.lastname: de Magalhães
authors.affiliation: Obras Assistenciais Irmã Dulce, Hospital Santo Antonio, Programa de Residência de Clínica Médica, SalvadorBA, Brasil, Programa de Residência de Clínica Médica, Hospital Santo Antonio, Obras Assistenciais Irmã Dulce - Salvador (BA), Brasil.
authors.forename: Márcia Sampaio
authors.initials: MS
authors.lastname: de Carvalho
authors.affiliation: Obras Assistenciais Irmã Dulce, Hospital Santo Antonio, Programa de Residência de Clínica Médica, SalvadorBA, Brasil, Programa de Residência de Clínica Médica, Hospital Santo Antonio, Obras Assistenciais Irmã Dulce - Salvador (BA), Brasil.
authors.forename: André Luiz Barreto
authors.initials: AL
authors.lastname: Cunha
authors.affiliation: Faculdade de Tecnologia e Ciências, SalvadorBA, Brasil, Curso Acadêmico, Faculdade de Tecnologia e Ciências - FTC - Salvador (BA), Brasil.
authors.forename: João Gabriel Athayde de Oliveira
authors.initials: JG
authors.lastname: Dantas
authors.affiliation: Escola Bahiana de Medicina e Saúde Pública, SalvadorBA, Brasil, Curso Acadêmico, Escola Bahiana de Medicina e Saúde Pública - Salvador (BA), Brasil.
authors.forename: Marília Galvão
authors.initials: MG
authors.lastname: Cruz
authors.affiliation: Escola Bahiana de Medicina e Saúde Pública, SalvadorBA, Brasil, Curso Acadêmico, Escola Bahiana de Medicina e Saúde Pública - Salvador (BA), Brasil.
authors.forename: Yasmin Laryssa Moura
authors.initials: YL
authors.lastname: Guimarães
authors.affiliation: Escola Bahiana de Medicina e Saúde Pública, Programa de Pós-Graduação em Medicina e Saúde Humana, SalvadorBA, Brasil, Programa de Pós-Graduação em Medicina e Saúde Humana, Escola Bahiana de Medicina e Saúde Pública - Salvador (BA), Brasil.
authors.forename: Constança Margarida Sampaio
authors.initials: CM
authors.lastname: Cruz
mesh_terms: D058186:Acute Kidney Injury / Q000145:classification / Q000401:mortality*; D000368:Aged; D000369:Aged, 80 and over; D015331:Cohort Studies; D016638:Critical Illness; D005260:Female; D006760:Hospitalization; D006801:Humans; D007362:Intensive Care Units; D016015:Logistic Models; D008297:Male; D008875:Middle Aged; D015999:Multivariate Analysis; D011446:Prospective Studies; D012372:ROC Curve