Table 1 Patient characteristics at ICU admission

Age, years

70 (60, 78)

64 (50, 75)

0.086

Male gender

10 (58)

68 (55)

0.786

SAPS II

54 (41, 59)

46 (35, 58)

0.307

SOFA score, mean ± SD

6.3 ± 3.2

6.4 ± 3.7

0.899

Admission category

0.999

  Medical

13 (76)

80 (76)

  Surgical

3 (17)

19 (18)

  Trauma

1 (5)

6 (5)

Comorbidities

  COPD

7 (4)

36 (34)

0.593

  Cirrhosis

1 (5)

3 (2)

0.456

  Chronic renal failure

1 (5)

8 (7)

>0.999

  Diabetes

4 (23)

17 (16)

0.491

  Chronic heart failure

2 (11)

19 (18)

0.734

  Immunosuppression

2 (11)

7 (6)

0.611

Cause of ICU admission

  Acute exacerbation of COPD

4 (23)

16 (15)

0.478

  ARDS

2 (11)

9 (8)

0.651

  Shock

3 (17)

27 (25)

0.560

  Community-acquired pneumonia

3 (17)

23 (21)

>0.999

  Healthcare-associated pneumonia

0 (0)

9 (8)

0.358

  Hospital-acquired pneumonia

0 (0)

5 (4)

>0.999

  Congestive heart failure

0 (0)

4 (3)

>0.999

  Neurologic failure

2 (11)

15 (14)

>0.999

  Other

6 (35)

31 (29)

0.777

Infection

10 (58)

67 (63)

0.788