Journal
TOBACCO CONTROL
Volume 16, Issue 2, Pages 127-132Publisher
BMJ PUBLISHING GROUP
DOI: 10.1136/tc.2006.018119
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Objective: To compare levels of particulate matter, as a marker of secondhand smoke (SHS) levels, in pubs before and 2 months after the implementation of Scottish legislation to prohibit smoking in substantially enclosed public places. Design: Comparison of SHS levels before and after the legislation in a random selection of 41 pubs in 2 Scottish cities. Methods: Fine particulate matter < 2.5 mu m in diameter (PM2.5) was measured discreetly for 30 min in each bar on 1 or 2 visits in the 8 weeks preceding the starting date of the Smoking, Health and Social Care (Scotland) Act 2005 and then again 2 months after the ban. Repeat visits were undertaken on the same day of the week and at approximately the same time of the day. Results: PM2.5 levels before the introduction of the legislation averaged 246 mu g/m(3) (range 8-902 mu g/m(3)). The average level reduced to 20 mu g/m(3) (range 6-104 mu g/m(3)) in the period after the ban. Levels of SHS were reduced in all 53 post-ban visits, with the average reduction being 86% (range 12-99%). PM2.5 concentrations in most pubs post-ban were comparable to the outside ambient air PM2.5 level. Conclusions: This study has produced the largest dataset of pre- and post-ban SHS levels in pubs of all worldwide smoke-free legislations introduced to date. Our results show that compliance with the Smoking, Health and Social Care (Scotland) Act 2005 has been high and this has led to a marked reduction in SHS concentrations in Scottish pubs, thereby reducing both the occupational exposure of workers in the hospitality sector and that of non-smoking patrons.
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