Variables of interest

2018

2020

Mean

SD

Mean

SD

Sex

Male

73%

/

73%

/

Female

27%

/

27%

/

Mortality

Overall

2%

/

3%

/

Age

Overall

67.06

10.79

69.99

11.22

<59

24%

/

18%

/

60 - 79

67%

/

63%

/

>80

9%

/

19%

/

Operation type

CABG

63%

/

45%

/

Heart valve surgery

25%

/

32%

/

Combination

12%

/

23%

/

BMI

Overall

27.82

4.42

28.12

4.04

No resp support

27.53

4.44

27.87

4.22

HFNC

28.85

4.34

28.52

3.59

Renal function

Overall

1.02

0.47

1.06

0.31

No resp support

0.998

0.31

1.06

0.32

HFNC

1.12

0.81

1.06

0.28

P/F ratio at admission

Overall

274.7

112.8

287.4

98.04

No resp support

304.88

106.9

303.9

93.98

HFNC

176.64

74.58

242.5

96.73

P/F ratio post extubation

Overall

313.7

113.3

335

109.3

No resp support

353.42

97.18

357.2

101.9

HFNC

181.81

44.71

268.2

105.4

APACHE II score

Admission

11.36

4.77

14.27

4.19

Discharge

7.49

3.94

10.55

3.64

LOS ICU

Overall

5.25

4.34

6.27

6.42

No resp support

4.09

1.77

4.67

1.71

HFNC

7.77

4.43

8.92

5.59

LOS Hospital

Overall

11.28

6.14

11.71

7.97