Table 2 Baseline characteristics of the early and late CRRT groups

 Age (years), median (IQR)

72 (61–78)

74 (62–78)

71 (61–77)

0.37

 Gender (male), n (%)

133 (70)

36 (69)

97 (71)

0.86

 Baseline serum creatinine (mg/dl), median (IQR)

1.0 (0.7–1.5)^a

1.5 (0.9–2.9)^a

0.9 (0.7–1.2)^a

<0.001

 Hypertension, n (%)

116 (61)

36 (69)

80 (58)

0.19

 Diabetes mellitus, n (%)

56 (30)

17 (33)

39 (29)

0.6

 Chronic kidney disease, n (%)

89 (47)

33 (63)

56 (41)

0.009

  Stage 2, n (%)

6 (7)

2 (4)

4 (3)

0.69

  Stage 3, n (%)

36 (40)

10 (19)

26 (19)

1

  Stage 4, n (%)

16 (18)

10 (19)

6 (4)

0.002

  Stage 5, n (%)

12 (13)

10 (19)

2 (2)

<0.001

  Unknown, n (%)

19 (21)

1(2)

18(16)

0.04

 Congestive heart failure, n (%)

34 (18)

10 (19)

24 (18)

0.83

 Serum creatinine (mg/dl), median (IQR)

2.0 (1.2–3.4)

1.5 (1.1–2.9)

2.1 (1.3–3.5)

0.047

 Bilirubin (mg/dl), median (IQR)

0.8 (0.5–1.6)

0.8 (0.5–1.3)

0.8 (0.5–1.7)

0.42

 Platelets (cells/10³), median (IQR)

146 (66–211)

124 (66–207)

146 (68–214)

0.98

 PaO₂/FiO₂ ratio (Torr), median (IQR)

200 (117–329)

195 (117–297)

200 (119–329)

0.91

 SAPS II, median (IQR)

57 (44–72)

57 (40–68)

57 (45–72)

0.5

 Glasgow Coma Scale, median (IQR)

14 (6–15)

14 (3–15)

14 (6–15)

0.24