Table 1.

Sociodemographic, reproductive and prenatal care characteristics of the study participants. Cities of Rio de Janeiro and Porto Alegre, Southeastern and Southern Brazil, 2000–2002.

Variable	Rio de Janeiro (n = 3,778)		Porto Alegre (n = 1,439)		Total (n = 5,217)		p-value
	n	%	n	%	n	%
Age (years)
< 20	987	26.1	295	20.5	1,282	24.6	0.000
20–24	1,260	33.4	458	31.8	1,718	32.9
25–29	736	19.5	302	21.0	1,038	19.9
30–34	433	11.4	204	14.2	637	12.2
≥ 35	351	9.3	159	11.0	510	9.8
Missing information	11	0.3	21	1.5	32	0.6
Schooling (years)
≤ 4	1,224	32.4	461	32.0	1,685	32.3	0.183
5–8	1,879	49.7	746	51.9	2,625	50.3
>8	669	17.7	226	15.7	895	17.2
Missing information	6	0.2	6	0.4	12	0.2
Skin color/ethnicity
White	1,093	28.9	882	61.3	1,975	37.9	0.000
Mixed	1,531	40.5	204	14.2	1,735	33.2
Black	1,134	30.1	338	23.5	1,472	28.2
Asian/native	13	0.3	11	0.7	24	0.5
Missing information	7	0.2	4	0.3	11	0.2
Familiar income in Brazilian monthly minimal wages
≤1	1,182	31.3	401	27.9	1,583	30.3	0.262
>1 and <3	1,260	33.3	450	31.3	1,710	32.8
≥3	1,283	34.0	494	34.3	1,777	34.1
Missing information	53	1.4	94	6.5	147	2.8
Number of prenatal care visits
None	867	23.0	521	36.2	1,388	26.6	0.000
1–3	840	22.2	316	22,0	1,156	22.2
4–6	1,371	36.3	305	21.2	1,676	32.1
≥7	693	18.3	211	14.6	904	17.3
Missing information	7	0.2	86	6.0	93	1.8
Number of previous pregnancies
None	1,051	27.8	268	18.6	1,319	25.3	0.000
1–2	1,684	44.6	625	43.4	2,309	44.3
≥3	1,043	27.6	514	35.8	1,557	29.8
Missing information	–	–	32	2.2	32	0.6
Number of abortions
None	2,882	76.3	1,146	79.6	4,028	77.2	0.001
1	649	17.2	201	14.0	850	16.3
>1	242	6.4	57	4.0	299	5.7
Missing information	5	0.1	35	2.4	40	0.8
Timing of HIV testing
During labor	1,228	32.5	1,277	88.7	2,505	48.0	0.000
Postpartum	2,550	67.5	155	10.8	2,705	51.8
Missing information	–	–	7	0.5	7	0.2
Rapid test result
Positive	50	1.3	93	6.5	143	2.7	0.000
Negative	3,726	98.6	1,344	93.4	5,070	97.2
Missing information	2	0.1	2	0.1	4	0.1