Table 1.

Estimated prevalence of early sexual initiation, according to socioeconomic and demographic variables. Pelotas, Southern Brazil, 1982 to 2004-5

Variable	n	%	Men		Women
			n	%	n	%
Skin color*,**	<0.001****		<0.001****		1.00****
White	3193	10.9	1627	17.0	1566	4.7
Black or mixed	886	16.7	457	28.0	429	4.7
Family income - 1982 (MMW)**	<0.001***,*****		<0.001***,*****		0.002*****
≤ 1.0	833	15.8	424	24.3	409	7.1
1.1 to 3.0	2091	14.0	1076	22.1	1015	5.4
3.1 to 6.0	792	9.0	410	13.9	382	3.7
6.1 to 10.0	249	8.4	127	14.2	122	2.5
>10.0	241	3.7	121	5.8	120	1.7
Change in income (1982 → 2004-5)**	<0.001***,*****		<0.001***,*****		<0.001***,*****
Has always been poor	691	17.5	324	28.4	367	7.9
Not poor → poor	702	14.2	334	22.5	368	6.8
Poor → not poor	648	16.7	349	25.5	299	6.4
Has never been poor	2185	9.1	1160	14.6	1025	2.9
Adolescent’s level of education (years)**	<0.001***,*****		<0.001***,*****		<0.001***,*****
0-4	311	33.1	182	40.7	129	22.5
5-8	1197	17.9	710	25.2	487	7.2
9-11	2057	8.7	1005	14.6	1052	2.9
≥12	661	5.0	760	9.3	391	2.0
Total***	4226	12.5	2167	19.6	2059	5.0

MMW: Monthly minimum wage.

^*147 interviewees reported they were either Asian or indigenous.

^**Of all the 4,297 interviewees in 2004-2005, there was lack of information about 91 people (2.1% of interviewees).

^***There was no information about early sexual initiation for 71 interviewees.

^****Chi-square test for homogeneity.

^*****Chi-square test for linear trend.