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Table 5 Characteristics of patients with acute renal failure, stratified by time of initiation of renal replacement therapy (RRT)

From: A positive fluid balance is associated with a worse outcome in patients with acute renal failure

Characteristic Early RRT n = 213 Late RRT n = 65 P value
Age 62.3 ± 15.5 64.6 ± 15.0 0.30
Male gender 126 (59.4) 44 (68.8) 0.18
SAPS II 49.7 ± 17.5 45.3 ± 18 0.04
SOFA score 9.2 ± 4.1 8.2 ± 3.5 0.04
Mechanical ventilation 166 (77.9) 61 (93.8) <0.01
Type of admission    
   Medical 87 (40.8) 38 (58.5) 0.01
   Surgical 126 (59.2) 27 (41.5) 0.01
Urine output, L/24 hours 0.18 (0.03–0.50) 0.47 (0.09–1.74) <0.001
Creatinine, mg/dL 3.99 (2.57–6.17) 3.29 (2.10–5.00) 0.06
ICU stay, days 6.1 (2.5–14.8) 12.2 (8.0–26.5) <0.001
Hospital stay, days 25.0 (8.0–46.0) 27.0 (17.0–45.0) 0.10
ICU mortality, number (percentage) 84 (39.4) 40 (61.5) <0.01
60-day mortality, number (percentage) 94 (44.8) 42 (64.6) <0.01
  1. Data represent mean ± standard deviation, number (percentage), or median (interquartile range). ICU, intensive care unit; SAPS II, Simplified Acute Physiology Score II; SOFA, sequential organ failure assessment.