Table 3 Subgroup analysis of pneumothorax

Sex (Male/female)

45/22

84/41

0.000, 0.996

Age (years)

61.8 ± 15.0

62.3 ± 12.6

0.213, 0.831

Smoking history (Yes/No)

11/56

18/107

0.139, 0.710

Pulmonary emphysema (Yes/No)

16/51

31/94

0.020, 0.888

Lesion diameter

2.8 ± 1.6

3.7 ± 2.4

3.125, 0.002

Lesion feature

 Solid

59

105

2.167, 0.352

 Ground glass

5

17

 Cavity

3

3

Lesion location

 Right upper lobe

16

23

5.549, 0.234

 Right middle lobe

3

9

 Right lower lobe

21

28

 Left upper lobe

18

33

 Left lower lobe

9

32

Patient position (Supine/Prone)

25/42

47/78

0.002, 0.969

Gelfoam (Yes/No)

18/49

59/66

7.509, 0.006

Pathology results(Benign/Malignant/ Insufficient material)

19/46/2

29/95/1

2.228, 0.310

Radiofrequency ablation (Yes/No)

23/44

20/105

8.431, 0.004

The number of samples

 1

28

41

1.668, 0.647

 2

31

65

 3

6

15

 4

2

4