Table 1. Baseline Characteristics of Patients.

Characteristics	Patients (n = 18)
Age, mean ± SD (range) in years	34.7 ± 14.9 (16–64)
Sex (M:F)	15:3
Involved lung
Right	10
Left	8
Etiology of pneumothorax
Spontaneous	15
Iatrogenic	3
Size of pneumothorax (%)
< 30	2
30–60	9
> 60	7

SD = standard deviation