title: [Sexual debut in adolescence and gender relations: a cross-sectional study in São Paulo, Brazil, 2002].
abstract: This cross-sectional study aimed to assess gender differences in adolescents in relation to onset of sexual activity. A total of 406 15-19-year-old adolescents from a family health unit in the city of São Paulo, Brazil, were interviewed from May to December 2002. Nearly half had already had their first sexual intercourse, at a mean age of 15, independently of gender. Sexual debut was usually unplanned (72.7%) and inside the home (86.1%). An equal proportion (61.0%) of males and females used some contraceptive method in their first sexual intercourse; however, more males had used a contraceptive method in their most recent intercourse. Having initiated their sexual activity in stable, affective relationships, females proved to be more vulnerable to STD/AIDS, since they switched from condoms to the pill in their subsequent sexual activity. Male adolescents continued to use mostly condoms, probably because they were involved mainly in non-stable relationships.
authors.affiliation: Escola de Enfermagem, Universidade de São Paulo, São Paulo, Brazil. alvilela@usp.br
authors.forename: Ana Luiza Vilela
authors.initials: AL
authors.lastname: Borges
authors.forename: Néia
authors.initials: N
authors.lastname: Schor
mesh_terms: D000293:Adolescent; D000294:Adolescent Behavior; D000328:Adult; D001938:Brazil; D003075:Coitus; D017280:Condoms / Q000706:statistics & numerical data; D003276:Contraceptives, Oral / Q000008:administration & dosage; D003430:Cross-Sectional Studies; D005260:Female; D006801:Humans; D007407:Interviews as Topic; D008297:Male; D012737:Sex Factors
chemical_list: D003276:Contraceptives, Oral