Table 3.

Possible risk factors for pneumothorax

Factor	OR (95 % CI)	p value
Sex	1.280 (0.417–3.935)	0.666
Age (>65 years)	0.908 (0.235–3.505)	0.889
Location	0.861 (0.275–2.680)	0.476
Puncture	1.470 (0.509–4.243)	0.476
Smoking	1.375 (0.257–7.353)	0.710
PD	0.525 (0.227–1.211)	0.131

PD pleural distance