Primary diagnosis

Total n = 269 (No., %)

Control group air leak < 5 days n = 238 (No., %)

Air leak ≥ 5 days n = 31 (No., %)

P-value*

Lung cancer

165 (61.34)

141 (59.24)

24 (77.42)

0.056

Lung metastases

31 (11.52)

31 (13.03)

0

Recurrent pneumothorax

25 (9.29)

22 (9.24)

3 (9.68)

ILD

18 (6.69)

18 (7.56)

0

Other (Benign lung lesions, infection)

30 (11.15)

26 (10.92)

4 (12.90)