title: Are Canadian youth still exposed to second-hand smoke in homes and in cars?
abstract: BACKGROUND
  The objective of this manuscript is to examine the prevalence of youth exposed to second-hand smoke (SHS) in homes and cars, changes in SHS exposure over time, and factors associated with beliefs youth hold regarding SHS exposure among a nationally representative sample of Canadian youth.
  
  
  METHODS
  Descriptive analysis of SHS exposure in homes and cars was conducted using data from the Canadian Youth Smoking Survey (2004, 2006 and 2008). Logistic regression was conducted to examine factors associated with beliefs youth had about SHS exposure in 2008.
  
  
  RESULTS
  In 2008, 21.5% of youth reported being exposed to SHS in their home on a daily or almost daily basis, while 27.3% reported being exposed to SHS while riding in a car at least once in the previous week. Between 2004 and 2008, the prevalence of daily SHS exposure in the home and cars decreased by 4.7% and 18.0% respectively.
  
  
  CONCLUSIONS
  Despite reductions in SHS exposure over time, a substantial number of Canadian youth continue to be exposed to SHS in homes and cars. Further effort is required to implement and evaluate policies designed to protect youth from SHS.
authors.affiliation: Prevention & Cancer Control, Cancer Care Ontario, Toronto, Ontario, Canada.
authors.forename: A
authors.initials: A
authors.lastname: Barisic
authors.affiliation: School of Public Health and Health Systems, University of Waterloo, Waterloo, Ontario, Canada.
authors.forename: S T
authors.initials: ST
authors.lastname: Leatherdale
authors.affiliation: Propel Centre for Population Health Impact, University of Waterloo and the Canadian Cancer Society, Waterloo, Ontario, Canada.
authors.forename: R
authors.initials: R
authors.lastname: Burkhalter
authors.affiliation: Epidemiology and Cancer Registry, Cancer Care Manitoba, Winnipeg, Manitoba, Canada.
authors.forename: R
authors.initials: R
authors.lastname: Ahmed
mesh_terms: D000293:Adolescent; D001336:Automobiles / Q000706:statistics & numerical data*; D002170:Canada; D004781:Environmental Exposure / Q000706:statistics & numerical data*; D005260:Female; D007722:Health Knowledge, Attitudes, Practice; D006306:Health Surveys; D006798:Housing / Q000706:statistics & numerical data*; D006801:Humans; D008297:Male; D012907:Smoking / Q000523:psychology; D014028:Tobacco Smoke Pollution / Q000706:statistics & numerical data*
chemical_list: D014028:Tobacco Smoke Pollution
keywords: car/vehicle; home/household; prevention; tobacco smoke pollution; youth