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Table 2 Perioperative outcomes

From: Impact of smoking on the outcomes of minimally invasive direct coronary artery bypass

Variable

Smokers (n = 135)

Non-smokers (n = 223)

Ex-smokers (n = 183)

p value

Median

(1Q; 3Q)

Median

(1Q; 3Q)

Median

(1Q; 3Q)

Operation time [min]

150

(135; 170)

155

(138; 180)

160

(135; 180)

0.2

Artificial ventilation time [hours]

6.7

(4.7; 10.0)

7.6

(5.6; 10.3)

7

(5.0; 9.3)

0.09

24 h Blood loss [ml]

500

(350; 650)

450

(350; 650)

450

(300; 550)

0.14

ICU stay [hours]

24.2

(21.2; 45.8)

24.1

(20.9; 46.0)

23.5

(19.7; 46.8)

0.87

Hospital stay [days]

8

(7.0; 9.0)

8.6

(7.4; 11.0)

8

(7.0; 10.0)

0.002

Variable

Number

Percentage

Number

Percentage

Number

Percentage

p value

Urgent surgery [n, %]

16

(11.9)

11

(4.9)

4

(2.2)

0.002

Paliative revascularization [n, %]

46

(34.1)

75

(33.6)

66

(36.1)

0.87

Hybrid revascularization [n, %]

14

(10.4)

27

(12.1)

37

(20.2)

0.02

Conversion to sternotomy [n, %]

1

(0.7)

9

(4.0)

4

(2.2)

0.15

Reintubation [n, %]

5

(3.7)

3

(1.4)

3

(1.7)

0.27

Catecholamines for > 24 h [n, %]

53

(39.3)

73

(32.7)

70

(38.3)

0.36

Inotropes [n, %]

18

(13.3)

39

(17.5)

25

(13.7)

0.45

Transfusion need [n, %]

17

(12.6)

34

(15.3)

19

(10.4)

0.34

Revision for bleeding [n, %]

6

(4.5)

8

(3.6)

4

(2.2)

0.51

Postoperative infarction [n, %]

2

(1.5)

6

(2.7)

1

(0.6)

0.24

Pleural effusion [n, %]

38

(28.2)

68

(30.5)

45

(24.6)

0.42

Pneumothorax [n, %]

8

(5.9)

7

(3.1)

2

(1.1)

0.05

Subcutaneous emphysema [n, %]

21

(18.9)

9

(4.8)

13

(9.0)

 < 0.001

Respiratory infection [n, %]

11

(8.2)

11

(4.9)

5

(2.7)

0.09

Respiratory dysfunction [n, %]

18

(13.3)

13

(5.8)

20

(10.9)

0.05

Wound healing complication [n, %]

1

(0.7)

14

(6.3)

9

(4.9)

0.04

Neurological complication [n, %]

3

(2.2)

1

(0.45)

0

(0.0)

0.06

Renal Complication [n, %]

4

(3.0)

7

(3.1)

6

(3.3)

0.99

SIRS [n, %]

1

(0.7)

4

(1.8)

1

(0.6)

0.44

Atrial fibrillation postoperatively [n, %]

20

(14.8)

56

(25.1)

38

(20.8)

0.07

Gastrointestinal complication [n, %]

4

(3.0)

8

(3.6)

8

(4.4)

0.8

COPD exacerbation [n, %]

5

(3.7)

0

(0.0)

3

(1.6)

0.02

Composite of pulmonary complications [n, %]

42

(31.1)

25

(11.2)

36

(19.7)

 < 0.0001

Early mortality [n, %]

0

(0.0)

3

(1.4)

1

(0.6)

0.33

  1. The influence of smoking status on the outcomes was tested by Pearson’s Chi-square test for categorical variables, and Kruskal–Wallis nonparametric analysis of variance with post-hoc Dunn‘s test with Bonferroni modification for continuous variables
  2. Values highlighted in bold were found to be statistically significant
  3. 1Q first quartile; 3Q third quartile; 24 h twenty-four hour; COPD chronic obstructive pulmonary disease; ICU intensive care unit; SIRS systemic inflammatory response syndrome