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Open Access Reductions in Secondhand Smoke Exposure among Non-smokers Post-legislation

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Objectives: We evaluated associations between provincial smoke-free legislation implementation and changes in secondhand smoke exposure (SHSe) prevalence in a prospective cohort of non-smokers in Alberta's Tomorrow Project (ATP). Methods: We had 11,564 non-smoking ATP participants with both enrollment (pre-legislation) and follow-up (post-legislation) self-report questionnaire data. They comprised the main data set with a subset (N = 7133) employed at both time-points who were utilized for the workplace evaluation. Participants reported frequency of home and workplace SHSe at enrollment and follow-up. We used adjusted Generalized Estimating Equation modeling to evaluate the association between smoke-free legislation implementation and changes in home and workplace SHSe. Results: Pre-legislation workplace and home SHSe prevalences were 19.8% and 9.7% respectively; these levels declined post-legislation by 33.3% and 47.4% respectively. Adjusted GEE models corroborated these reductions (adjusted odds ratio (AOR) = 0.59, 95% CI: 0.55-0.64 and AOR= 0.58, 95% CI: 0.51-0.68, respectively). We found a statistically significant interaction between sex and policy period for home SHSe but not workplace SHSe. Conclusion: Implementation of comprehensive smoke-free legislation targeting work and public places was associated with significant reductions in self-reported home and workplace SHSe among non-smokers with no evidence of exposure displacement in the home.
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Keywords: ALBERTA'S TOMORROW PROJECT; SECONDHAND SMOKE EXPOSURE; TOBACCO WORKPLACE LEGISLATION

Document Type: Research Article

Publication date: September 1, 2019

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  • Tobacco Regulatory Science (Electronic ISSN 2333-9748) is a rigorously peer-reviewed online scientific journal for the dissemination of research relevant to the regulation of tobacco products. The journal content includes a broad array of research domains, including chemistry, biology, behavior, community, and population-level surveillance and epidemiology, as well as knowledge syntheses (eg, meta-analyses or state-of-the-art reviews) and analytic modeling. All articles describe the policy relevance of the research outcomes. Given the global nature of tobacco regulation, particularly as a result of international and national policies, Tobacco Regulatory Science publishes high quality research that is relevant to global regulatory needs and requirements. Tobacco Regulatory Science is published electronically 6 times per year.
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