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Table 1

From: ICU acquired acute renal failure carries a higher mortality than acute renal failure on admission to ICU

  Total All patients with ARF ARF on admission to ICU ARF during stay in ICU
Number of patients 26 669 (100%) 2395 (9.0%) 1394 (5.2%) 1001 (3.8%)
Female:male 1 : 1.7 1 : 1.9 1 : 1.8 1 : 2.1
Mean age (SD) 59.1 (17.4) 59.7 (17.3) 59.6 (17.7) 59.7 (16.9)
APACHE II score on admission (SD) 12.9 (8.3) 19.7 (9.5) 20.97 (7.2) 17.8 (6.4) *
APACHE II score on day of ARF (SD) N/A N/A 20.97 (7.2) 23.1 (7.3) *
Mean length of stay in ICU (days) 3.9 8.0 8.7 7.2
Need for RRT (%) 769 (2.9%) 769 (32.1%) 384 (27.5%) 385 (38.5%) *
Mean duration of RRT (days) N/A 2.1 1.7 2.7
Hospital mortality of patients on RRT 505 (65.7%) 505 (65.7%) 241 (62.8%) 264 (68.6%) *
Hospital mortality 6633 (25%) 1340 (56%) 734 (52.7%) 606 (60.5%) *
  1. *P < 0.001 (comparison between ARF on admission to ICU and ARF during stay in ICU); N/A = not applicable; SD = standard deviation.