Table 1 Demographic and clinical characteristics of patients and controls^a

Mean age, yr (± SD)

60.6 (± 14)

61.2 (± 16)

0.22

Males, n (%)

57 (77%)

188 (64%)

0.03

APACHE II score (± SD)

16.4 (± 8)

18.5 (± 8)

0.36

Type of admittance^b, n (%)

   Medical

34 (46%)

135 (46%)

0.82

   Planned surgery

30 (43%)

128 (43%)

0.79

   Urgent surgery

10 (14%)

33 (11%)

0.65

   Cardiovascular

39 (53%)

124 (42%)

0.85

Diagnostic category, n (%)

   Respiratory

17 (23%)

74 (25%)

0.33

   Sepsis

2 (3%)

12 (4%)

0.41

   Neurological

9 (12%)

39 (13%)

0.41

   Gastrointestinal

5 (7%)

33 (11%)

0.15

   Vascular

1 (1%)

6 (2%)

0.45

   Metabolism

1 (1%)

1 (0.3%)

0.56

   Hematological

-

3 (1%)

0.99

   Renal

-

3 (1%)

0.99