title: [Prevalence of and risk factors for cigarette smoking among adolescents in South America: a systematic literature review].
abstract: OBJECTIVE
  To describe the prevalence of teenage smoking and the factors associated with smoking in this age group in South America.
  
  
  METHODS
  Searches for articles concerning teenage smoking in Latin America were conducted in two bibliographic databases: MEDLINE (1966-2002) and Latin American and Caribbean Literature on the Health Sciences ("LILACS") (1982-2002). We also reviewed governmental and nongovernmental documents and Web sites. From the 315 articles that we identified, we considered 45 to be relevant for this paper.
  
  
  RESULTS
  In each of the countries that we studied, there was often a wide range found in prevalence levels, depending in part on the particular age range studied and on the definition of smokers that was used. The leading risk factor for teenage smoking was smoking among siblings and friends. Additional risk factors were poor academic performance, being older, male gender, having paid work, and having parents who were separated.
  
  
  CONCLUSIONS
  Additional population-based studies with teenagers should be carried out, and more uniform criteria for defining smokers should be developed.
authors.affiliation: Universidade Federal de Pelotas, Pelotas, Brasil. mmalcon@zaz.com.br
authors.forename: Maura C
authors.initials: MC
authors.lastname: Malcon
authors.forename: Ana Maria B
authors.initials: AM
authors.lastname: Menezes
authors.forename: Maria De Fátima S
authors.initials: MF
authors.lastname: Maia
authors.forename: Moema
authors.initials: M
authors.lastname: Chatkin
authors.forename: César G
authors.initials: CG
authors.lastname: Victora
mesh_terms: D000293:Adolescent; D006801:Humans; D015995:Prevalence; D012307:Risk Factors; D012907:Smoking / Q000453:epidemiology*; D013020:South America / Q000453:epidemiology