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Table 4 Outcomes for all patients and for patients classified according to the maximum Risk, Injury, Failure, Loss, and End-stage Kidney (RIFLE) class

From: RIFLE criteria for acute kidney injury are associated with hospital mortality in critically ill patients: a cohort analysis

  No acute kidney injury (n = 1,766) Risk (n = 670) Injury (n = 1,436) Failure (n = 1,511) All injury (n = 5,383)
Renal replacement therapy* 1 (0.1%) 0 (0%) 4 (0.3%) 214 (14.2%) 219 (4.1%)
Hospital LOS after reaching maximum RIFLE class (days)* 5 (3–10) 5 (3–10) 7 (4–14) 11 (5–23) 7 (3–14)
ICU LOS (days)* 3 (2–4) 3 (2–6) 5 (3–10) 9 (4–21) 4 (2–9)
Hospital LOS (days)* 6 (4–10) 8 (5–14) 10 (6–19) 16 (9–31) 9 (5–19)
Hospital mortality* 97 (5.5%) 59 (8.8%) 163 (11.4%) 398 (26.3%) 717 (13.3%)
  1. Continuous variables presented as the median (interquartile interval) and categorical variables presented as the percentage. LOS, length of stay; ICU, intensive care unit. *P = 0.001 between the four subgroups no acute kidney injury, RIFLE class risk, RIFLE class injury and RIFLE class failure.