From: The incidence and risk factors of asymptomatic primary spontaneous pneumothorax detected during health check-ups
All case
(%)
APSP
p-value
Total students
101,529
(100.0%)
43
(0.042%)
Sex
 Male
78,678
(77.5%)
39
(0.050%)
0.043*
 Female
22,851
(22.5%)
4
(0.018%)