title: [The impact of family characteristics in sexual risk behaviour of teens].
abstract: OBJECTIVE
  To assess risk sexual behaviour in adolescents and its relationship with family characteristics.
  
  
  METHODS
  In a representative and random sample of 909 teenagers, their sex life, structure, satisfaction and family dynamics were evaluated. It was used chi-squared test, in order to compare the frequency of family negative characteristics between the groups of adolescents with and without risky sexual behaviors.
  
  
  RESULTS
  The early onset of sexual life was more frequent in adolescents with dysfunctional expression of affection in their families, and single-parent or nuclear family structure. The lack of condom use was associated with a lack of affection, and a poor comunication within the family. Having more than three partners was related to the expression of affection and the degree of satisfaction of the teenager with his family. Unplanned pregnancies and sex transmission diseases were most frequent in adolescents belonging to extended families with a poor expression of affection.
  
  
  CONCLUSIONS
  The level of communication, the monitoring of conduct, the warmth and proximity play a very important role as protectors of sexual risk behaviour in teens.
authors.affiliation: Unidad de Investigación en Epidemiología Clínica, Hospital de Especialidades, Centro Médico Nacional Siglo XXI, Instituto Mexicano del Seguro Social. Servicio de Salud Mental, Hospital General de México OD, Secretaría de Salud. lavielle.pilar@gmail.com.
authors.forename: Pilar
authors.initials: P
authors.lastname: Lavielle-Sotomayor
authors.forename: Fanianel
authors.initials: F
authors.lastname: Jiménez-Valdez
authors.forename: Arturo
authors.initials: A
authors.lastname: Vázquez-Rodríguez
authors.forename: María del Carmen
authors.initials: Mdel C
authors.lastname: Aguirre-García
authors.forename: Martha
authors.initials: M
authors.lastname: Castillo-Trejo
authors.forename: Santa
authors.initials: S
authors.lastname: Vega-Mendoza
mesh_terms: D000293:Adolescent; D000294:Adolescent Behavior / Q000523:psychology*; D003430:Cross-Sectional Studies; D005191:Family Characteristics; D005195:Family Relations; D005260:Female; D006801:Humans; D008297:Male; D010549:Personal Satisfaction; D012309:Risk-Taking; D011795:Surveys and Questionnaires; D047568:Unsafe Sex / Q000523:psychology*; D055815:Young Adult
keywords: Adolescent; Sexuality; Unsafe sex