title: Secondhand smoke exposure and smoking behavior among young adult bar patrons.
abstract: OBJECTIVE
  We described frequency of secondhand smoke (SHS) exposure among young adults patronizing bars and associations between SHS exposure, attitudes, and smoking behavior.
  
  
  METHODS
  We collected cross-sectional surveys from randomized time-location samples of bar patrons aged 18 to 26 years in San Diego, California, and Oklahoma City and Tulsa, Oklahoma, in 2010 to 2011. Multivariate logistic regression evaluated associations between SHS exposure, attitudes about dangers of SHS, susceptibility to smoking initiation among nonsmokers, and quit attempts among current smokers.
  
  
  RESULTS
  More than 80% of respondents reported past 7-day exposure to any SHS, and more than 70% reported exposure at a bar. Current smokers reported more SHS exposure in cars and their own homes than did nonsmokers. Among nonsmokers, SHS exposure was associated with susceptibility to initiation, but those who believed that SHS exposure is harmful were less susceptible. Belief that SHS is dangerous was associated with quit attempts among smokers.
  
  
  CONCLUSIONS
  Smoke-free environments and education about the harms of SHS may decrease tobacco use among young adults who frequent bars, where they are heavily exposed to SHS.
authors.affiliation: Sara Kalkhoran was with the Internal Medicine Residency Program, Department of Medicine, Torsten B. Neilands is with the Center for AIDS Prevention Studies, and Pamela M. Ling is with the Division of General Internal Medicine, Department of Medicine, and the Center for Tobacco Control Research and Education, University of California, San Francisco.
authors.forename: Sara
authors.initials: S
authors.lastname: Kalkhoran
authors.forename: Torsten B
authors.initials: TB
authors.lastname: Neilands
authors.forename: Pamela M
authors.initials: PM
authors.lastname: Ling
mesh_terms: D000293:Adolescent; D000328:Adult; D001336:Automobiles; D002140:California / Q000453:epidemiology; D003430:Cross-Sectional Studies; D004781:Environmental Exposure / Q000009:adverse effects / Q000706:statistics & numerical data*; D005260:Female; D007722:Health Knowledge, Attitudes, Practice; D006798:Housing; D006801:Humans; D008297:Male; D009825:Oklahoma / Q000453:epidemiology; D012147:Restaurants; D012907:Smoking / Q000523:psychology*; D016540:Smoking Cessation / Q000706:statistics & numerical data*; D011795:Surveys and Questionnaires; D014028:Tobacco Smoke Pollution / Q000009:adverse effects / Q000706:statistics & numerical data*; D055815:Young Adult
chemical_list: D014028:Tobacco Smoke Pollution
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