Table 5

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

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

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.

Payen et al. Critical Care 2008 12:R74   doi:10.1186/cc6916