Objective: To evaluate the impact of an indoor smoke-free bylaw in Toronto, Ontario, implemented June 2004.
Methods: We used a pre-post comparison design to assess secondhand smoke (SHS) exposure among 79 eligible bar workers in Toronto, Ontario (bylaw enacted), and 49 eligible bar workers in a control community, Windsor, Ontario (no bylaw change), at four times: preban, and 1, 2, and 9 months postban.
Results: SHS exposure time and urinary cotinine level were substantially reduced in Toronto bar workers immediately after the ban by 94% (from 7.8 to 0.5 hours) and 68% (from 24.2 to 7.8 ng/mL), respectively. The reduction was sustained throughout follow-up. There was no change among Windsor bar workers before and after the ban.
Conclusions: Compliance with the ban was high, and the ban led to a substantial reduction in SHS exposure.Author(s): Susan Bondy, Bo Zhang, Nancy Kreiger, Peter Selby, Neal Benowitz, Heather Travis, Ana Florescu, Nicole Greenspan, and Roberta Ferrence
Date: May 2009
Type of Publication: Journal Article