Table 3 Sex- and age-adjusted analysis to examine the association of postoperative complications and patient characteristics

BMI (kg/m²)

23 (21–25)

23 (21–25)

0.91

0.96 (0.89–1.03)

0.26

ASA-PS I

202

10

0.002*

II/I 1.89 (0.93–4.15)

0.077

ASA-PS II

417

66

III/I 1.37 (0.28–5.18)

0.67

ASA-PS III

23

3

III/II 0.73 (0.17–2.21)

0.61

Anesthesia time (minutes. Hours in OR)

169 (127–234)

298 (210–389)

p < 0.001*

1.53 (1.37–1.73)

p < 0.001*

sAs

8 (7–9)

7 (6–8)

0.001*

0.82 (0.70–0.97)

0.019*

Drinking (lifetime)

460/632 (73%)

54/78 (69%)

0.51

0.79 (0.46–1.41)

0.42

No drinking habit (the preceding year)

249/632 (39%)

30/78 (38%)

0.87

0.99 (0.58–1.69)

0.98

Unchanged drinking habit

146/376 (39%)

13/47 (28%)

0.14

0.74 (0.34–1.53)

0.42

Improved drinking habit

230/376 (61%)

34/47 (72%)

0.14

0.74 (0.69–2.20)

0.47

AUDIT score

1 (0–5)

2 (0–8)

0.13

1.23 (0.97–1.07)

0.45

AUDIT score of 8 or more

93/596 (16%)

18/77 (23%)

0.084

1.48 (0.77–2.76)

0.24

Smoking (lifetime)

225/616 (37%)

38/77 (49%)

0.029*

1.39 (0.80–2.39)

0.24

No smoking habit (the preceding year)

492/616 (80%)

57/77 (74%)

0.23

0.68 (0.38–1.27)

0.22

Unchanged smoking habit

38/122 (31%)

3/18 (17%)

0.34

0.79 (0.18–2.46)

0.71

Improved smoking habit

84/122 (69%)

15/18 (83%)

0.34

1.48 (0.74–2.83)

0.26

FTND score

0 (0–0)

0 (0–0)

0.44

1.10 (0.96–1.25)

0.15

FTND score of 3 or more

80/611 (13%)

12/75 (16%)

0.49

0.79 (0.40–1.68)

0.53

K6 score

3 (1–6)

4 (1–6)

0.55

1.07 (1.00–113)

0.040*

K6 score of 8 or more

94/615 (15%)

14/79 (18%)

0.57

1.51 (0.77–2.80)

0.22

HADS score

8 (4–13)

8 (5–14)

0.96

1.02 (0.98–1.06)

0.24

HADS score of 20 or more

33/611 (5.5%)

7/79 (8.9%)

0.22

1.97 (0.76–4.52)

0.15

Length of stay after surgery

8 (5–12)

21 (12–38)

p < 0.001*