Objective:to evaluate breastfeeding self-efficacy, the presence of postpartum depression symptons and the association between breastfeeding self-efficacy and postpartum depression with cessation of exclusive breastfeeding. Method:cohort study with 83 women. The instruments used were the Breastfeeding Self-Efficacy Scale and the Edinburgh Postnatal Depression Scale. Statistical analysis was conducted using the log-rank tests, analysis of variance and the Cox survival model. Results:breastfeeding self-efficacy (p = 0.315) and postpartum depression (p = 0.0879) did not show any statistical difference over time. The chances of cessation of exclusive breastfeeding decreased by 48% when self-efficacy changed from low to medium and by 80% when it changed from medium to high. Postpartum women who scored ≥10 on the Edinburgh Postnatal Depression Scale interrupt exclusive breastfeeding, on average, 10 days earlier than those with a score ≤9, whose median breastfeeding duration was 38 days postpartum. Conclusion:breastfeeding self-efficacy was proved to be a protective factor for exclusive breastfeeding, while postpartum depression is a risk factor.

RESUMOObjetivo: Identificar as impressões de adolescentes acerca do que poderia representar um ritual de passagem. Métodos: Estudo descritivo realizado junto a 751 adolescentes de ambos os sexos, entre 12 e 20 anos, que freqüentavam três escolas públicas do ensino fundamental e médio da região de Santo Eduardo do município de Embu, São Paulo. Resultados: Após análise de conteúdo desvelamos as categorias: mudanças físicas; mudanças psicológicas (subcategorias: responsabilidade, experiências, conflitos); mudanças sociais (subcategorias: identidade social, corpo social, inter-relacionamentos); comportamento sexual (subcategorias: interesse sexual, intercurso sexual); fatos traumáticos (subcategorias: sentimento de perda, luto pela infância perdida); independência. Conclusão: Os rituais de passagem relacionam-se diretamente com a mudança corporal, produto do adolescer, sendo ocorrências marcantes e significativas na vida do individuo. Descritores: Adolescente; Comportamento do adolescente; Saúde coletiva ABSTRACT Objective: To identify adolescents' impressions about what could represent a passage ritual. Methods: This descriptive study was performed with 751 adolescents, of both genders, with ages between 12 and 20 years, who attended three public primary and secondary level schools in the Santo Eduardo region in the municipality of Embu, Sao Paulo state. Results: After the content analysis, the following categories were revealed: physical changes; psychological changes (subcategories: responsibility, experiences, conflicts); social changes (subcategories: social identity, social body, interrelationships); sexual behavior (subcategories: sexual interest; sexual intercourse); traumatic factors (subcategories: feeling of lost, mourning for the lost childhood); independence. Conclusion: The passage rituals are directly related to the body changes, a product of adolescence, which are marking and significant occurrences in one's life. Keywords: Adolescent; Adolescent behavior; Colletive health RESUMEN Objetivo: Identificar las impresiones de adolescentes respecto a lo que podría representar un ritual de pasaje. Métodos: Estudio descriptivo realizado con 751 adolescentes de ambos sexos, entre 12 y 20 años, que frecuentaban tres escuelas públicas de enseñanza primaria y secundaria de la región de San Eduardo del municipio de Embu, Sao Paulo. Resultados: Después del análisis de contenido develamos las categorías: cambios físicos; cambios psicológicos (subcategorías: responsabilidad, experiencias, conflictos); cambios sociales (subcategorías: identidad social, cuerpo social, interrelaciones); comportamiento sexual (subcategorías: interés sexual, intercurso sexual); hechos traumáticos (subcategorías: sentimiento de pérdida, duelo por la infancia perdida); independencia. Conclusión: Los rituales de pasaje se relacionan directamente con el cambio corporal, producto del adolecer, siendo ocurrencias que dejan huellas y que son significativas en la vida del individuo.