Table 1.

The demographic and anamnestic variables of the subjects under study.

	Groupp A (N = 358)	Group B (N = 367)	p value
Age (year)§	34.02 ± 6.5	34.2 ± 6.2	0.71
Parity (no.)∗	1 (0-3)	1 (0-3)	0.52
Educational level∗	2 (1-3)	2 (1-3)	0.64
Smoke°
≤10 sig/die	190 (53.1)	187 (52.2)	0.81
>10 sig/die	168 (46.9)	171 (47.8)
Alchohol habits°
Weekly	301 (84.1)	318 (86.6)	0.33
Daily	57 (15.9)	49 (13.4)
Sexual partners°
≤4	94 (26.3)	112 (30.5)	0.20
>4	264 (73.7)	255 (69.5)

° χ square, ^§t-test, ^∗Mann–Whitney.