Table 1 Clinical characteristics of the 1,776 ICU patients

Age in years, mean ± SD (range)

61.0 ± 17.3 (15–100)

Male sex (%)

64

SAPS II

40.1 ± 16.4

Mac Cabe 1 (%)

49.8

Mac Cabe 2 (%)

41.0

Mac Cabe 3 (%)

9.2

Mechanical ventilation (%)

77.0

Mechanical ventilation duration (days)

10.4 ± 14.6

Shock on admission (%)

23.5

Sepsis (%)

21.4

Creatinine level on admission (μmol/L)

145 ± 185

Extra-renal therapy (%)

11.5

ICU stay (days)

14.6 ± 16.0

ICU mortality rate (%)

20.2