ArticlePloS one2021
Prevalence and correlates of early sexual initiation among Brazilian adolescents.
Article in PloS one, 2021. The graph could read no effect estimate from its abstract, so it casts no vote on the map. Cited by 16 papers, 2 of them syntheses that pooled it.
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16 citing papers in PubMed, 2 syntheses or guidelines pooled it.
- Web-based sexual and reproductive health education for adolescents aged 10-17 years: a systematic review and meta-analysis.BMJ paediatrics open · 2025Pooled it
- Assessment of the differences in Mean Age at Menarche (MAM) among adolescent girls in rural and urban Nigeria: a systematic review.BMC public health · 2024Pooled it
- Effectiveness of an online sexual and reproductive health educational program on knowledge, attitudes, and behaviours among senior primary school students: a cluster randomized controlled trial.Reproductive health · 2025Trial
- Usability of the "Be Yourself" IA-powered, chatbot-based website for the prevention of adolescent pregnancy.Investigacion y educacion en enfermeria · 2026Article
- "Exploring the factors associated with early sexual debut among young women in Kinshasa: evidence from two cross-sectional studies ".Reproductive health · 2026Article
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- Early sexual debut among adolescent girls and young women in Sierra Leone: A multilevel analysis of prevalence and predictors.Contraception and reproductive medicine · 2024Article
- Associations of tobacco and alcohol use with sexual behaviors among adolescents in 59 countries: a population-based study.BMC public health · 2024Article
- "You cannot stay with one person once you begin having sex at a young age": the prevalence, correlates and effects of early sexual debut among children in Ghana.Reproductive health · 2024Article
- Time to First Sexual Experience and Its Determinants Among Female Youths: A Survival Analysis of Rwanda Demographic Health Survey (2019-2020).International journal of women's health · 2024Article
- Personal, Interpersonal, and Sociocultural Factors of Condom Use in Rural Indigenous Nahuas Adolescents in Mexico.Children (Basel, Switzerland) · 2023Article
- Prevalence and associated factors of early sexual initiation among youth female in sub-Saharan Africa: a multilevel analysis of recent demographic and health surveys.BMC women's health · 2023Article
- Association between early sexual initiation and sexually transmitted infections among Peruvian reproductive-age women.Frontiers in public health · 2023Article
- Characterization of adolescent sexual practices.Revista latino-americana de enfermagem · 2022Observational
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Authors and funding
4 authors.
Funding
No grant is acknowledged in the PubMed record.
Abstract
backgroundEarly adolescence is a critical stage in adolescents. This is the phase at which many young people start their sexual life early, increasing the risk of sexually transmitted infections and unintended pregnancy. Few studies have analyzed the factors associated with early sexual initiation in very young adolescents in low- and middle-income countries. Therefore, this study assessed the early sexual initiation stratified by sex and its correlates in a sample of Brazilian adolescents.
methodsThe study sample included Brazilian adolescents aged 12-14 who participated in The Study of Cardiovascular Risk in Adolescents (ERICA), a multicenter, school-based, country-wide, cross-sectional study. Early sexual initiation was defined as the first sexual intercourse at or before 14 years old. Multivariate logistic regression was used to identify independent factors associated with early sexual initiation.
resultsThe prevalence of early sexual initiation was 7% among girls and 18% in boys. In a multivariate analysis, the adolescent's age, mother's schooling, smoking, alcohol consumption, and Tanner Stages were associated with early sexual initiation for both boys and girls. For girls, living with both parents, common mental disorders, and age at menarche were predictors of early sexual initiation, while race and type of school were correlated to early sexual initiation only for boys.
conclusionsThe early sexual initiation was associated with sociodemographic, lifestyle risk factors and secondary sexual characteristics in both sexes, while there were differences between the predictors of early sexual initiation among girls and boys. It emphasizes the importance of sex education and promotes healthy lifestyles in environments through families and schools in early adolescence.
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