title: Association between clean indoor air laws and voluntary smokefree rules in homes and cars.
abstract: OBJECTIVE
  This study examines the influence that smokefree workplaces, restaurants and bars have on the adoption of smokefree rules in homes and cars, and whether there is an association with adopting smokefree rules in homes and cars.
  
  
  METHODS
  Bivariate probit models were used to jointly estimate the likelihood of living in a smokefree home and having a smokefree car as a function of law coverage and other variables. Household data were obtained from the nationally representative Social Climate Survey of Tobacco Control 2001, 2002 and 2004-2009; clean indoor air law data were from the American Nonsmokers' Rights Foundation Tobacco Control Laws Database.
  
  
  RESULTS
  'Full coverage' and 'partial coverage' smokefree legislation is associated with an increased likelihood of having voluntary home and car smokefree rules compared with 'no coverage'. The association between 'full coverage' and smokefree rule in homes and cars is 5% and 4%, respectively, and the association between 'partial coverage' and smokefree rules in homes and cars is 3% and 4%, respectively. There is a positive association between the adoption of smokefree rules in homes and cars.
  
  
  CONCLUSIONS
  Clean indoor air laws provide the additional benefit of encouraging voluntary adoption of smokefree rules in homes and cars.
authors.affiliation: College of Public Health, Institute of Health Policy and Management, National Taiwan University, Taipei, Taiwan.
authors.forename: Kai-Wen
authors.initials: KW
authors.lastname: Cheng
authors.affiliation: Department of Society, Human Development and Health, Harvard School of Public Health, Boston, Massachusetts, USA.
authors.forename: Cassandra A
authors.initials: CA
authors.lastname: Okechukwu
authors.affiliation: Department of Psychology and the Social Science Research Center, Mississippi State University, Starkville, Mississippi, USA.
authors.forename: Robert
authors.initials: R
authors.lastname: McMillen
authors.affiliation: Department of Medicine, University of California San Francisco, San Francisco, California, USA.
authors.forename: Stanton A
authors.initials: SA
authors.lastname: Glantz
mesh_terms: D000293:Adolescent; D000328:Adult; D000368:Aged; D016902:Air Pollution, Indoor / Q000331:legislation & jurisprudence*; D001336:Automobiles; D005191:Family Characteristics; D005260:Female; D015438:Health Behavior; D006798:Housing; D006801:Humans; D008297:Male; D008875:Middle Aged; D012147:Restaurants; D061845:Smoke-Free Policy / Q000331:legislation & jurisprudence*; D012907:Smoking / Q000331:legislation & jurisprudence*; D000074606:Smoking Prevention; D014028:Tobacco Smoke Pollution / Q000331:legislation & jurisprudence*; D017132:Workplace; D055815:Young Adult
chemical_list: D014028:Tobacco Smoke Pollution
keywords: Prevention; Public Policy; Secondhand Smoke