title: [Teenage pregnancy and frequent use of alcohol and drugs in the home environment].
abstract: OBJECTIVE
  To assess individual and family factors associated to teenage pregnancy, including frequent use of alcohol and illicit drugs by family members.
  
  
  METHODS
  Case-control study conducted with a sample of 408 sexually active female adolescents (aged 13-17 years) in school from the city of Marília (Southeastern Brazil) in 2003-2004. Cases consisted of 100 primigravid teenagers assisted in prenatal care programs in health units. Controls were 308 nulligravid students from state public schools. Standardized instruments identified demographic and educational factors, contraceptive behavior, mental health problems, and family characteristics. Statistical analysis included chi-square tests and logistic regression models.
  
  
  RESULTS
  Low paternal education (p=0.01), lack of information on sexuality and fertilization (p=0.001) and the use of illicit drugs by a resident family member (p=0.006) were independent risk factors. Family income per capita and asking the partner to use a condom were confounders.
  
  
  CONCLUSIONS
  The frequent use of illicit drugs by a resident family member is a factor strongly associated to teenage pregnancy, regardless of other risk factors. The expectation of going to college constitutes a protective factor, mainly in the presence of low maternal education.
authors.affiliation: Faculdade de Medicina de Marília, Rua Lourival Freire 140, Marília, São Paulo, Brazil. vgcaputo@yahoo.com.br
authors.forename: Valéria Garcia
authors.initials: VG
authors.lastname: Caputo
authors.forename: Isabel Altenfelder
authors.initials: IA
authors.lastname: Bordin
mesh_terms: D000293:Adolescent; D000428:Alcohol Drinking / Q000453:epidemiology*; D001938:Brazil / Q000453:epidemiology; D016022:Case-Control Studies; D005190:Family; D005260:Female; D006801:Humans; D016017:Odds Ratio; D011247:Pregnancy; D011253:Pregnancy in Adolescence / Q000523:psychology / Q000706:statistics & numerical data*; D012307:Risk Factors; D012959:Socioeconomic Factors; D019966:Substance-Related Disorders / Q000453:epidemiology*