Table 1 Patient demographic characteristics at baseline

 Male

29 (63%)

30 (61.2%)

0.03

0.86

 Female

17 (37%)

19 (38.8%)

Age (years), mean ± SD

53.04 ± 9.53

55.61 ± 10.61

− 1.24

0.22^a

Height (cm), mean ± SD

163.91 ± 8.29

162 ± 8.12

1.14

0.26^a

Weight (kg), mean ± SD

63.57 ± 11.68

60.47 ± 11.13

1.32

0.19^a

 VHD

36 (78.3%)

34 (69.4%)

0.96

0.33

 CAD

10 (21.7%)

15 (30.6%)

 I

2 (4.3%)

0 (0%)

− 1.1

0.27^b

 II

16 (34.8%)

14 (28.6%)

 III

26 (56.5%)

33 (67.3%)

 IV

2 (4.3%)

2 (4.1%)

 None

2 (4.3%)

4 (8.2%)

− 0.5

0.62^b

 Primary

19 (41.3%)

18 (36.7%)

 Junior

14 (30.4%)

19 (38.8%)

 Senior/secondary school

6 (13%)

5 (10.2%)

 College/university

5 (10.9%)

3 (6.1%)

 Married

45 (97.8%)

46 (93.9%)

0.62^c

 Unmarried

1 (2.2%)

3 (6.1%)

 Worker/enterprise/institutional workers

16 (34.8%)

9 (18.4%)

3.35

0.34

 Farmer

9 (19.6%)

13 (26.5%)

 Retiree

7 (15.2%)

9 (18.4%)

 Others

14 (30.4%)

18 (36.7%)

 Without insurance

5 (10.9%)

4 (8.2%)

0.74^c

 Insurance

41 (89.1%)

45 (91.8%)

Length of ICU stay (h), mean ± SD

63.72 ± 33.08

66.33 ± 33.70

− 0.38

0.71^a

Duration of use of corticosteroid (days), median

2 (0.3)

2 (0.2)

− 0.97

0.32^b

Duration of use of sedatives (days), median

1 (0.2)

0 (0.1)

− 1.1

0.27^b

Duration of use of analgesics (days), median

0 (0.2)

0 (0.1)

− 1.65

0.1^b

Duration of MV (h), median

20.42 (16.63, 43.63)

20 (14.63, 42.33)

− 0.71

0.48^b