title: Smoking habits before and after the introduction of a minimum-age law for tobacco purchase: analysis of data on adolescents from three regions of Sweden.
abstract: OBJECTIVE
  The purpose of this study was to analyse changes in smoking habits among adolescents in three regions of Sweden following the introduction in 1997 of a law prohibiting sales of tobacco to persons under 18 years: the minimum-age law.
  
  
  METHODS
  The analysis is based on data collected among adolescents in compulsory school years 7 and 9 (about 13-14 and 15-16 years respectively), in 1996, 2000, and 2005, in three regions of Sweden. The samples comprise 43,857 students who completed a self-administered questionnaire anonymously in the classroom. The data were subjected to contingency-table analysis and logistic regression analysis.
  
  
  RESULTS
  The rates of smoking among students in year 9 were significantly lower in 2005 than in 1996 in two regions and unchanged in one region. This pattern held even after control for sex, parents' smoking habits, and academic orientation. In year 7 there were no changes over time (boys) or any clear pattern (girls).
  
  
  CONCLUSIONS
  Based on outcomes from test purchases of tobacco products that were carried out in parallel to the collection of the questionnaire data, it is reasonable to hypothesize that the regional differences described may at least in part be due to differences in the availability of cigarettes. In 2005 it was significantly easier for adolescents to purchase tobacco products at retailers in the city of Malmö than at those in the counties of Värmland and Västernorrland.
authors.affiliation: Karlstad University, Karlstad, Sweden. curt.hagquist@kau.se
authors.forename: Curt
authors.initials: C
authors.lastname: Hagquist
authors.forename: Mona
authors.initials: M
authors.lastname: Sundh
authors.forename: Charli
authors.initials: C
authors.lastname: Eriksson
mesh_terms: D000293:Adolescent; D000367:Age Factors; D005260:Female; D006801:Humans; D008297:Male; D012737:Sex Factors; D012907:Smoking / Q000453:epidemiology / Q000331:legislation & jurisprudence; D000074606:Smoking Prevention; D011795:Surveys and Questionnaires; D013548:Sweden / Q000453:epidemiology