Table 3 Relationship between patient characteristics or operative factors and postoperative air leakage

Gender

 Male

88 (15%)

497 (85%)

 < 0.01

 Female

24 (7%)

347 (94%)

Age

 < 75 y

77 (11%)

622 (89%)

0.26

 ≥ 75 y

35 (14%)

222 (86%)

Smoking history

 Present

87 (15%)

508 (85%)

 < 0.01

 Absent

25 (7%)

336 (94%)

Coexistence of interstitial lung disease

 Present

0 (0%)

22 (100%)

0.08

 Absent

112 (12%)

822 (88%)

Coexistence of diabetes mellitus

 Present

18 (13%)

118 (87%)

0.55

 Absent

94 (11%)

726 (89%)

Coexistence of malignancy

 Present

21 (13%)

140 (87%)

0.56

 Absent

91 (12%)

704 (88%)

Coexistence of asthma

 Present

3 (10%)

25 (90%)

0.86

 Absent

109 (12%)

819 (88%)

Coexistence of arrhythmia or angina pectoris

 Present

11 (11%)

87 (89%)

0.87

 Absent

101 (12%)

757 (88%)

FEV₁%

 < 70%

52 (16%)

281 (84%)

 < 0.01

 ≥ 70%

60 (10%)

563 (90%)

Lobe

 RU

33 (11%)

256 (89%)

0.18

 RM

4 (7%)

54 (93%)

 RL

28 (12%)

203 (88%)

 LU

34 (15%)

186 (85%)

 LL

13 (8%)

145 (92%)

Operative approach

 C-VATS + RATS

51 (15%)

290 (85%)

0.02

 H-VATS + Open

61 (10%)

554 (90%)

Operative procedure

 Lobectomy or more

87 (12%)

622 (88%)

0.36

 Sublobar resection

25 (10%)

222 (90%)