Marinho Lilian F B, Aquino Esteia M L, Almeida Maria da Conceição C de
Instituto de Saúde Coletiva, Universidade Federal da Bahia, Salvador, Brasil.
Cad Saude Publica. 2009;25 Suppl 2:S227-39. doi: 10.1590/s0102-311x2009001400005.
This study investigated contraceptive use during first sexual intercourse among 2.790 young men and women. The GRAVAD household survey in three Brazilian capital cities involved interviews in a probabilistic sample. A hierarchical logistic regression analysis was used. Variables grouped as: macro-social, socialization and sexual initiation, context of sexual initiation, and characteristics of the interviewee and his or her partner. The prevalence of contraceptive use was 68.3% for women and 65.3% for men. Among women, contraception use was associated to: per capita monthly family income, color/race, and the use of women's magazines as a source of information on pregnancy and contraception. For both genders, use was more frequent when partners discussed pregnancy prevention before intercourse, when sexual initiation was delayed and in a motel, and when the partner was patient. The interval between the start of the relationship and sexual initiation appeared associated to use during sexual initiation for men. Results suggest that macro-social factors determine more frequent contraception use during sexual initiation for women, while for men the relational context is more important.
本研究调查了2790名年轻男女首次性行为期间的避孕措施使用情况。在巴西三个首都城市进行的GRAVAD家庭调查涉及对概率样本的访谈。采用了分层逻辑回归分析。变量分为：宏观社会、社会化与性初次体验、性初次体验背景以及受访者及其伴侣的特征。女性避孕措施的使用率为68.3%，男性为65.3%。在女性中，避孕措施的使用与以下因素相关：家庭月人均收入、肤色/种族以及将女性杂志作为怀孕和避孕信息来源的使用情况。对于两性而言，当伴侣在性交前讨论过预防怀孕、性初次体验延迟且在汽车旅馆进行，以及伴侣有耐心时，避孕措施的使用更为频繁。恋爱开始至性初次体验的间隔时间似乎与男性性初次体验期间的避孕措施使用情况相关。结果表明，宏观社会因素决定了女性在性初次体验期间更频繁地使用避孕措施，而对男性来说，关系背景更为重要。
