Table 1 Characteristics of patients

No of patients

36,307

3,322

Male (%)

60.1

60.3

Age in years^a

62.5 ± 16.1

62.4 ± 15.9

SAPS II^a

42.7 ± 18.4

47.6 ± 15.7

SAPS II predicted mortality^a

0.34 ± 0.28

0.42 ± 0.27

GCS score below 15 (%)

33.1

33.6

PaO₂ at admission (kPa)^a

13.2 ± 6.5^b

12.5 ± 5.5^c

FiO₂ (%)^a

50.4 ± 19.9^b

53.1 ± 18.7^c

PaO₂/FiO₂ ratio (kPa)^a

29.1 ± 15.0^b

24.6 ± 12.6^c

Admission type (%):

   Medical

48.4

61.0

   Unplanned surgery

22.6

23.0

   Planned surgery

28.9

16.0

Referring specialty (%):

   Internal medicine

16.4

16.7

   Cardiology

10.8

17.9

   Pulmonary disease

7.4

10.4

   Neurology

5.7

6.4

   Surgery

33.2

30.6

   Cardiothoracic surgery

6.4

1.2

   Neurosurgery

6.9

6.1

   Other

13.1

10.7

ICU mortality

23.0

21.0

In-hospital mortality (%)

31.1

32.7