title: Evaluation of a tobacco prevention programme among teenagers in Sweden.
abstract: OBJECTIVE
  To study the prevalence of tobacco use among teenagers, to evaluate a tobacco prevention programme and to study factors related to participation in the prevention programme.
  
  
  METHODS
  Population-based prospective cohort study.
  
  
  METHODS
  Within the Obstructive Lung disease in Northern Sweden (OLIN) studies, a cohort study about asthma in schoolchildren started in 2006. All children aged 7-8 years in three municipalities were invited to a questionnaire survey and 2585 (96%) participated. The cohort was followed up at age 11-12 years (n=2612, 95% of invited) and 14-15 years (n=2345, 88% of invited). In 2010, some of the children in the OLIN cohort (n=447) were invited to a local tobacco prevention programme and 224 (50%) chose to participate.
  
  
  RESULTS
  At the age of 14-15 years, the prevalence of daily smoking was 3.5%. Factors related to smoking were female sex, having a smoking mother, participation in sports and lower parental socioeconomic status (SES). The prevalence of using snus was 3.3% and risk factors were male sex, having a smoking mother, having a snus-using father and non-participation in the prevention programme. In the prevention programme, the prevalence of tobacco use was significantly lower among the participants compared with the controls in the cohort. Factors related to non-participation were male sex, having a smoking mother, lower parental SES and participation in sports.
  
  
  CONCLUSIONS
  The prevalence of tobacco use was lower among the participants in the tobacco prevention programme compared with the non-participants as well as with the controls in the cohort. However, the observed benefit of the intervention may be overestimated as participation was biased by selection.
authors.affiliation: Department of Public Health and Clinical Medicine, Division for Occupational and Environmental Medicine, The OLIN Unit, Umeå University, Umeå, Sweden.
authors.forename: Linnéa
authors.initials: L
authors.lastname: Hedman
authors.affiliation: Department of Public Health and Clinical Medicine, Division for Occupational and Environmental Medicine, The OLIN Unit, Umeå University, Umeå, Sweden.
authors.forename: Martin
authors.initials: M
authors.lastname: Andersson
authors.affiliation: Department of Research, Norrbotten County Council, Luleå, Sweden.
authors.forename: Caroline
authors.initials: C
authors.lastname: Stridsman
authors.affiliation: Department of Public Health and Clinical Medicine, Division for Occupational and Environmental Medicine, The OLIN Unit, Umeå University, Umeå, Sweden.
authors.forename: Eva
authors.initials: E
authors.lastname: Rönmark
mesh_terms: D000293:Adolescent; D017677:Age Distribution; D005260:Female; D006801:Humans; D008297:Male; D015995:Prevalence; D015397:Program Evaluation; D011446:Prospective Studies; D012307:Risk Factors; D017678:Sex Distribution; D012907:Smoking / Q000453:epidemiology; D016540:Smoking Cessation / Q000379:methods*; D000074606:Smoking Prevention; D012923:Social Class; D012959:Socioeconomic Factors; D013177:Sports / Q000706:statistics & numerical data; D013548:Sweden / Q000453:epidemiology
keywords: EPIDEMIOLOGY; PREVENTIVE MEDICINE; PUBLIC HEALTH