Table 1.

General characteristics of study population.

Sociodemographic	Unexposed (n = 30)	Exposed (n = 30)	p-Value
Age (years ± SD) a	39.6 ± 12.0	39.8 ± 12.7	0.93
Exposure time (years ± SD)	-	9.7 ± 9.1	-
Sex b
Men (n, %)	10 (33)	12 (40)	0.40
Women (n, %)	20 (67)	18 (60)
Smoke habit b
No (n, %)	22 (73)	13 (43)	0.02
Yes (n, %)	8 (27)	17 (57)

^a: t-Student; ^b: Independence χ².