Table 1 Baseline characteristics of the study subjects

Age, years

63.8 ± 2.5

62.5 ± 2.3

.715

Male gender, n (%)

14 (66.7)

17 (56.7)

.472

BMI, kg/m²

24.0 ± 0.8

24.7 ± 0.7

.518

Smoker, n (%)

10 (47.6)

15 (50)

.615

DM, n (%)

10 (47.6)

11 (38.1)

.917

HTN, n (%)

10 (47.6)

17 (56.7)

.524

CAD, n (%)

9 (42.9)

15 (50.0)

.615

COPD, n (%)

1 (4.8)

1 (3.3)

.796

Asthma, n (%)

0 (0)

1 (3.3)

.999

Chronic renal disease, n (%)

9 (42.9)

12 (40.0)

.838

Types of surgery

.933

 Thoracic endovascular aortic repair

3 (14.3)

3 (10.0)

 Valve replacement surgery

10 (47.6)

16 (53.3)

 Coronary artery bypass grafting

8 (38.1)

10 (33.3)

 Septal repair surgery

0 (0)

1 (3.3)

White Blood Cell count

9.7 ± 1.2

11.2 ± 1.0

.333

Creatinine

1.4 ± 0.3

1.9 ± 0.4

.407

Sodium

140.0 ± 0.8

139.3 ± 0.8

.537

Potassium

3.9 ± 0.1

4.0 ± 0.1

.563

Maximal inspiratory pressure, (cm H₂O)

36.2 ± 1.9

37.4 ± 1.7

.644

Duration of ventilator use (days)

2.1 ± 0.4

2.7 ± 0.6

.453

Length of ICU stay (days)

4.2 ± 0.6

4.8 ± 0.8

.560