Table 4 Baseline characteristics of the study population

Sex, n (%)

Men

66 (63.5)

71 (66.4)

Women

38 (36.5)

36 (33.6)

Age, years

Mean (SD)

63.3 (14.5)

65.8 (11.8)

Median (IQR)

68.0 (55.0-73.0)

68.0 (59.0-74.0)

Department, n (%)

Cardiac surgery patients

52 (50.0)

50 (46.7)

General surgery patients

19 (18.3)

22 (20.6)

Medical patients

33 (31.7)

35 (32.7)

Main procedure, n (%)

Surgical intervention

71 (68.3)

79 (73.8)

Non-surgical intervention

21 (20.2)

22 (20.6)

Diagnostic measure

10 (9.6)

3 (2.8)

Other procedure

2 (1.9)

3 (2.8)

ICD-10 chapter, main diagnosis, n (%)

Diseases of the circulatory system

70 (67.3)

82 (76.6)

Neoplasms

5 (4.8)

8 (7.5)

Diseases of the digestive system

5 (4.8)

6 (5.6)

Diseases of the respiratory system

7 (6.7)

1 (0.9)

Injury, poisoning and certain other consequences of external causes

4 (3.8)

4 (3.7)

Congenital malformations, deformations, and chromosomal abnormalities

4 (3.8)

1 (0.9)

Other chapters^a

9 (8.7)

5 (4.7)

FAS^b (t₀)

Mean (SD)

24.5 (18.9)

30.2 (22.1)

Median (IQR)

20.0 (10.0-37.5)

25.0 (10.0-48.8)

SAPS II^c (t₀)

Mean (SD)

23.8 (8.2)

26.1 (10.2)

Median (IQR)

23.0 (18.0-29.0)

24.5 (20.0-31.0)

TISS 28^d (t₀)

Mean (SD)

10.6 (5.6)

11.5 (6.5)

Median (IQR)

10.0 (5.0-14.0)

10.0 (10.0-14.0)

Type of ventilation in intensive care unit, n (%)

No ventilation

34 (32.7)

40 (37.4)

Non-invasive ventilation

8 (7.7)

2 (1.9)

Invasive ventilation

62 (59.6)

65 (60.7)

Ventilation in intensive care unit before the intervention, hours^e

Mean (SD)

25.0 (46.6)

41.8 (127.2)

Median (IQR)

10.3 (6.0-18.6)

10.0 (7.0-20.0)