Table 2

Patient characteristics

VariableResult
Sex—n (%)
 Male1078 (76.2)
 Female337 (23.8)
Age (years)—median (IQR)25.3 (21.0–29.4)
Side of pneumothorax—n (%)
 Right842 (59.5)
 Left573 (40.5)
Smoking history—n (%)
 Never smoker810 (57.2)
 Current smoker592 (41.8)
 Ex-smoker13 (0.9)
Vanderschueren's stage—n (%)
 Stage 129 (2.0)
 Stage 2383 (27.1)
 Stage 3801 (56.6)
 Stage 4202 (14.3)
Surgical indication—n (%)
 Recurrence1304 (92.2)
 Persistent air leak92 (6.5)
 Haemopneumothorax13 (0.9)
 First contralateral episode:4 (0.3)
 Bilateral pneumothorax1 (0.01)
 Profession at risk1 (0.01)