Not just 'a few wisps': real-time measurement of tobacco smoke at entrances to office buildings
Not just 'a few wisps': real-time measurement of tobacco smoke at entrances to office buildings
复制标题
DOI：
10.1136/tc.2010.041277
复制
发表时间：
2011-05-01
期刊：
影响因子：
5.2
通讯作者：
Ferrence, Roberta
中科院分区：
文献类型：
--
作者：
Kaufman, Pamela;Zhang, Bo;Ferrence, Roberta
室内吸烟限制的一个意想不到的后果是将吸烟转移到建筑物入口处，在那里非吸烟者可能会暴露在二手烟中，而来自室外区域的烟雾可能会通过入口漂移，暴露在里面的人。烟草烟雾与非吸烟者的许多健康影响有关，并且没有安全的二手烟（SHS）暴露水平。本文介绍的数据，烟草烟雾的水平内外的入口，以办公buildings.Methods实时空气质量监测仪，同时测量可吸入颗粒物（PM2.5，空气污染物颗粒，直径为2.5 μ m或更小）作为烟草烟雾的标记，内外28个入口，在市中心多伦多，安大略，在2008年5月和6月的办公大楼。测量时，吸烟和不存在于9米的入口。还测量了每个阶段的PM2.5背景水平。采用混合模型分析法估计PM2.5的浓度，并考虑重复测量误差。结果吸烟时PM2.5的峰值浓度（10 s平均值）高达496 μ g/m3。混合模型分析表明，吸烟导致室外PM2.5均值显著高于本底水平（p < 0.0001），且与点燃香烟数量显著正相关（p < 0.0001）。PM2.5与>= 5点燃香烟的平均水平是2.5倍大于平均背景level.Conclusions这些研究结果支持无烟政策在入口处的建筑物，以保护非吸烟者暴露于烟草烟雾。
Introduction An unintended consequence of indoor smoking restrictions is the relocation of smoking to building entrances, where non-smokers may be exposed to secondhand smoke, and smoke from outdoor areas may drift through entrances, exposing people inside. Tobacco smoke has been linked to numerous health effects in non-smokers and there is no safe level of secondhand smoke (SHS) exposure. This paper presents data on levels of tobacco smoke inside and outside entrances to office buildings.Methods Real-time air quality monitors were used to simultaneously measure respirable particulate matter (PM2.5; air pollutant particles with a diameter of 2.5 mu m or less) as a marker for tobacco smoke, outside and inside 28 entrances to office buildings in downtown Toronto, Ontario, in May and June 2008. Measurements were taken when smoking was and was not present within 9 m of entrances. Background levels of PM2.5 were also measured for each session. A mixed model analysis was used to estimate levels of PM2.5, taking into account repeated measurement errors.Results Peak levels (10 s averages) of PM2.5 were as high as 496 mu g/m(3) when smoking was present. Mixed model analysis shows that the average outdoor PM2.5 with smoking was significantly higher than the background level (p < 0.0001), and significantly and positively associated with the number of lit cigarettes (p < 0.0001). The average level of PM2.5 with >= 5 lit cigarettes was 2.5 times greater than the average background level.Conclusions These findings support smoke-free policies at entrances to buildings to protect non-smokers from exposure to tobacco smoke.