Table 1. Demographic characteristics of patients with pectus excavatum.

Characteristics	PE patients
Subjects	266
Age*	19.02 ± 4.42
Gender
Male	228
Female	38
Education
≤Junior middle school	68
Senior middle school	87
≥College	111
Marital status
Unmarried	259
Married	7
PE status*
HI	4.18 ± 1.20
Suffering year	9.78 ± 6.30

^*Data given as mean ± SD. PE: pectus excavatum; HI: Haller index