title: Tobacco smoke exposure in public places and workplaces after smoke-free policy implementation: a longitudinal analysis of smoker cohorts in Mexico and Uruguay.
abstract: OBJECTIVE
  To determine the prevalence, correlates and changes in secondhand smoke (SHS) exposure over the period after comprehensive smoke-free policy implementation in two Latin American countries.
  
  
  METHODS
  Data were analysed from population-based representative samples of adult smokers and recent quitters from the 2008 and 2010 waves of the International Tobacco Control Policy Evaluation Survey in Mexico (n = 1766 and 1840, respectively) and Uruguay (n = 1379 and 1411, respectively). Prevalence of SHS exposure was estimated for regulated venues, and generalized estimating equations were used to determine correlates of SHS exposure.
  
  
  RESULTS
  Workplace SHS exposure in the last month was similar within and across countries (range: Mexico 20-25%; Uruguay 14-29%). At the most recent restaurant visit, SHS exposure was lower where comprehensive smoke-free policies were implemented (range: Uruguay 6-9%; Mexico City 5-7%) compared with Mexican cities with weaker policies, where exposure remained higher but decreased over time (32-17%). At the most recent bar visit, SHS exposure was common (range: Uruguay 8-36%; Mexico City 23-31%), although highest in jurisdictions with weaker policies (range in other Mexican cities: 74-86%). In Uruguay, males were more likely than females to be exposed to SHS across venues, as were younger compared with older smokers in Mexico.
  
  
  CONCLUSIONS
  Comprehensive smoke-free policies are more effective than weaker policies, although compliance in Mexico and Uruguay is not as high as desired.
authors.affiliation: Department of Health Promotion, Education & Behavior, University of South Carolina, 800 Sumter Street, Room 216, Columbia, SC 29208, USA. E-mail: thrasher@sc.edu.
authors.forename: James F
authors.initials: JF
authors.lastname: Thrasher
authors.forename: Erika
authors.initials: E
authors.lastname: Nayeli Abad-Vivero
authors.forename: Ernesto M
authors.initials: EM
authors.lastname: Sebrié
authors.forename: Tonatiuh
authors.initials: T
authors.lastname: Barrientos-Gutierrez
authors.forename: Marcelo
authors.initials: M
authors.lastname: Boado
authors.forename: Hua Hie
authors.initials: HH
authors.lastname: Yong
authors.forename: Edna
authors.initials: E
authors.lastname: Arillo-Santillán
authors.forename: Eduardo
authors.initials: E
authors.lastname: Bianco
mesh_terms: D000293:Adolescent; D000328:Adult; D005260:Female; D006801:Humans; D008137:Longitudinal Studies; D008297:Male; D008800:Mexico / Q000453:epidemiology; D008875:Middle Aged; D016273:Occupational Exposure / Q000032:analysis*; D012147:Restaurants; D061845:Smoke-Free Policy; D012907:Smoking / Q000453:epidemiology*; D014028:Tobacco Smoke Pollution / Q000032:analysis*; D014583:Uruguay / Q000453:epidemiology; D017132:Workplace; D055815:Young Adult
chemical_list: D014028:Tobacco Smoke Pollution