title: Environmental tobacco smoke exposure patterns: a subanalysis of the Canadian Human Time-Activity Pattern Survey.
abstract: This subanalysis of the Canadian Human Activity Pattern Survey examines environmental tobacco smoke (ETS) exposure in non-smoking respondents relative to age, sex, socioeconomic status and prevalence of asthma. 2,381 respondents (response rate 64.5%) from Toronto, Vancouver, Edmonton and Saint John completed a 24-hour recall time-activity diary. For each activity and location, respondents were asked, "was there any smoking during the activity?" Among non-smoking adults, youth, children and asthmatics, the rates of ETS exposure were 32%, 34%, 30% and 42% respectively. Regarding the location of exposure, adults reported ETS exposure in various locations (work, bars and restaurants), including home. Children experienced the most exposure at home, primarily between 4 p.m. and midnight. Adults reported ETS mainly in the living room (16%) and vehicles (13%); for children, the living room (22%) and the bedroom (13%) were the most common locations. Determining characteristic time and location patterns for ETS exposure underpins educational strategies to help non-smokers avoid ETS exposure.
authors.affiliation: Air Quality Health Effects Research Section, Health Canada. jleech@civich.ottawa.on.ca
authors.forename: J A
authors.initials: JA
authors.lastname: Leech
authors.forename: K
authors.initials: K
authors.lastname: Wilby
authors.forename: E
authors.initials: E
authors.lastname: McMullen
mesh_terms: D000293:Adolescent; D000328:Adult; D017677:Age Distribution; D001249:Asthma / Q000453:epidemiology* / Q000209:etiology*; D002170:Canada / Q000453:epidemiology; D002648:Child; D002675:Child, Preschool; D003627:Data Interpretation, Statistical; D004781:Environmental Exposure / Q000009:adverse effects* / Q000032:analysis*; D004784:Environmental Monitoring / Q000379:methods*; D062665:Epidemiological Monitoring; D005260:Female; D006801:Humans; D008297:Male; D011159:Population Surveillance; D015995:Prevalence; D012307:Risk Factors; D011795:Surveys and Questionnaires; D013997:Time Factors; D013996:Time and Motion Studies; D014028:Tobacco Smoke Pollution / Q000009:adverse effects* / Q000706:statistics & numerical data*
chemical_list: D014028:Tobacco Smoke Pollution