title: Smoking family, secondhand smoke exposure at home, and quitting in adolescent smokers.
abstract: BACKGROUND
  This study investigated the associations of smoking family and secondhand smoke (SHS) exposure at home with quit attempts and smoking cessation among adolescents.
  
  
  METHODS
  Students from 85 randomly selected secondary schools in Hong Kong were surveyed using an anonymous self-administered questionnaire on SHS exposure at home and outside the home in the past 7 days, quit attempts, smoking cessation, sociodemographic characteristics, and smoking status of family members and peers. Families with 1 or more smoking members (excluding the subject) were classified as smoking families and otherwise as nonsmoking families. Logistic regression yielded adjusted odds ratios (AORs) for quit attempts and smoking cessation in smoking families with or without SHS exposure at home compared with nonsmoking families.
  
  
  RESULTS
  Of 4,361 students who had smoked in the past 12 months, 70.3% were living with smokers and 52.8% were exposed to SHS at home. Compared with nonsmoking families, the AORs (95% CI) for making at least 1 quit attempt in the past 12 months were 0.80 (0.61-1.05) for 0 day, 0.80 (0.63-1.04) for 1-3 days, and 0.65 (0.50-0.86) for 4-7 days of SHS exposure at home. The corresponding AORs (95% CI) for smoking cessation were 0.58 (0.48-0.70), 0.45 (0.35-0.58), and 0.49 (0.41-0.60) (p for trend <.001). Any SHS exposure at home was associated with 28% and 53% lower odds of quit attempts and smoking cessation, respectively.
  
  
  CONCLUSIONS
  Living with smoker(s) and especially being exposed to SHS at home may hinder quit attempts and smoking cessation among Chinese adolescent smokers.
authors.affiliation: School of Public Health, University of Hong Kong, Pokfulam, Hong Kong.
authors.forename: Man Ping
authors.initials: MP
authors.lastname: Wang
authors.forename: Sai Yin
authors.initials: SY
authors.lastname: Ho
authors.forename: Wing Sze
authors.initials: WS
authors.lastname: Lo
authors.forename: Tai Hing
authors.initials: TH
authors.lastname: Lam
mesh_terms: D000293:Adolescent; D003430:Cross-Sectional Studies; D005190:Family; D005260:Female; D006723:Hong Kong; D006801:Humans; D016015:Logistic Models; D008297:Male; D012574:Schools; D016540:Smoking Cessation / Q000523:psychology* / Q000706:statistics & numerical data*; D012931:Social Environment; D011795:Surveys and Questionnaires; D014028:Tobacco Smoke Pollution / Q000706:statistics & numerical data
chemical_list: D014028:Tobacco Smoke Pollution