title: Current smoking and secondhand smoke exposure and depression among Korean adolescents: analysis of a national cross-sectional survey.
abstract: OBJECTIVE
  To examine the association between cigarette smoke exposure and depression among Korean adolescents using the seventh Korea Youth Risk Behavior Web-based Survey (KYRBWS).
  
  
  METHODS
  Cross-sectional study.
  
  
  METHODS
  A nationally representative sample of middle and high school students across South Korea.
  
  
  METHODS
  75 643 eligible participants across the country.
  
  
  METHODS
  Current smoking, secondhand smoke exposure and depression.
  
  
  METHODS
  Data were analysed from a nationally representative survey of 75 643 participants (37 873 men and 37 770 women). Data were gathered on extensive information including current smoking, secondhand smoke exposure and depression in adolescence. Multiple logistic regression analysis was used to estimate the association between current smoking, secondhand smoke exposure and depression in Korean adolescents.
  
  
  RESULTS
  Among those who had never smoked, secondhand smoke exposure was positively associated with depression in male and female adolescents in a dose-response relation (OR 1.27, OR 1.52 in males; OR 1.25, OR 1.72 in females). Similar associations were observed among currently smoking men and women in a dose-response manner (OR 1.29, OR 1.55 in males; OR 1.22, OR 1.41 in females). These significant trends were consistently observed even after adjustments.
  
  
  CONCLUSIONS
  We suggested that current smoking and secondhand smoke exposure were positively associated with depression in male and female adolescents. Efforts to encourage no smoking and no secondhand smoke exposure will be established for adolescents.
authors: Department of Occupational and Environmental Medicine, College of Medicine, Soonchunhyang University, Seoul, Korea.
authors: Kyung-Jae
authors: KJ
authors: Lee
mesh_terms: D000293:Adolescent; D003430:Cross-Sectional Studies; D003863:Depression / Q000453:epidemiology*; D005260:Female; D006801:Humans; D008297:Male; D056910:Republic of Korea / Q000453:epidemiology; D012907:Smoking / Q000453:epidemiology*; D014028:Tobacco Smoke Pollution
chemical_list: D014028:Tobacco Smoke Pollution
keywords: Epidemiology; Mental Health; Preventive Medicine; Public Health