• Sunday Azagba, Lingpeng Shan, and Lauren Manzione.
• Department of Family and Preventive Medicine, University of Utah School of Medicine, United States of America. Electronic address: sunday.azagba@utah.edu.
• Prev Med. 2020 Oct 1; 139: 106196.

AbstractThe current study examined home and workplace vaping restrictions and their associations with e-cigarette use, frequency of e-cigarette use, and exposure to environmental vape aerosol among adults in the U.S. We used data from the 2018 Tobacco Use Supplement to the Current Population Survey to determine these associations. Analysis was done with a multivariable logistic and zero-inflated Poisson regression. Of 46,751 participants, 2.1% currently used e-cigarettes and 89% reported restricted home vaping. Of 19,091 working participants, 83% had worksite vaping restrictions and 6% reported environmental vapor exposure. Respondents with household vaping restrictions had lower odds of current e-cigarette use (full ban: aOR: 0.07, 95% CI: 0.05-0.09; partial ban: aOR: 0.51, 95% CI: 0.40-0.66). The expected number of days of past-month e-cigarette use for those with some household vaping restrictions was significantly fewer than for those without restrictions (full ban: IRR: 0.92, 95% CI: 0.85-0.99; partial ban, IRR: 0.89, 95% CI: 0.81-0.97). Workers with full workplace vaping restrictions had lower odds of workplace environmental vape aerosol exposure than those without a restriction (aOR: 0.21, 95% CI: 0.17-0.25). Vaping restrictions in homes were associated with lower prevalence and frequency of e-cigarette use. Those in worksites with complete vaping bans were less likely to be exposed to environmental aerosol at work. Home e-cigarette restrictions appear to have a stronger association with e-cigarette use behaviors than workplace restrictions.Copyright © 2020 Elsevier Inc. All rights reserved.

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