Table 1 Patient characteristics

Sex, male

7 (54)

6 (75)

14 (75)

0.59

Age, years

70 (34–84)

57 (23–81)

64 (32–84)

0.49

Weight, kg

70 (50–100)

74 (55–135)

78 (60–110)

0.41

Reason for admission

0.29

 Respiratory

2 (15)

5 (63)

7 (33)

 Circulatory

3 (23)

1 (13)

4 (19)

 Trauma

2 (15)

0

1 (5)

 Post-CPR

2 (15)

0

2 (10)

 Postoperative

4 (31)

1 (13)

7 (33)

 AKI

0

1 (13)

0

Vasopressor dependent

13 (100)

6 (75)

16 (76)

0.15

Mechanical ventilation

11(85)

8 (100)

19 (91)

0.51

Sepsis

5 (39)

5 (63)

8 (38)

0.46

APACHE II at ICU admission

28 (11–42)

22 (15–37)

25 (14–41)

0.47

SAPS II at ICU admission

75 (43–112)

47 (37–77)

52 (32–86)

0.002

SOFA at ICU admission

14 (7–21)

11 (8–15)

13 (8–18)

0.02

ICU stay, days

5 (2–82)

20 (4–48)

20 (3–81)

0.08

LOS in ICU at start CVVH, days

1 (1–5)

2 (1–4)

2 (0–14)

0.74

Biochemical data

Creatinine at start, μΜ

249 (100–410)

420 (156–626)

326 (47–622)

0.01

Creatinine 24 hours, μM

206 (140–250)

284 (125–463)

232 (46–441)

0.05

Urea at start, mM

21 (6–48)

32 (12–97)

21 (6–41)

0.25

Urea 24 hours, mM

17 (6–34)

17 (11–102)

14 (6–28)

0.24

Leukocytes at start, ×10⁹

8 (1–17)

12 (7–20)

12 (1–26)

0.29

Leukocytes 24 hours, ×10⁹

10 (1–26)

13 (6–26)

11 (2–28)

0.85

Platelets at start, ×10⁹

65 (22–173)

167 (44–352)

118 (35–332)

0.03

Platelets 24 hours, ×10⁹

59 (13–148)

117 (27–239)

105 (5–349)

0.02