Change in indoor particle levels after a smoking ban in Minnesota bars and restaurants.

BACKGROUND Smoking bans in bars and restaurants have been shown to improve worker health and reduce hospital admissions for acute myocardial infarction. Several studies have also reported improved indoor air quality, although these studies generally used single visits before and after a ban for a convenience sample of venues. PURPOSE The primary objective of this study was to provide detailed time-of-day and day-of-week secondhand smoke-exposure data for representative bars and restaurants in Minnesota. METHODS This study improved on previous approaches by using a statistically representative sample of three venue types (drinking places, limited-service restaurants, and full-service restaurants), conducting repeat visits to the same venue prior to the ban, and matching the day of week and time of day for the before- and after-ban monitoring. The repeat visits included laser photometer fine particulate (PM₂.₅) concentration measurements, lit cigarette counts, and customer counts for 19 drinking places, eight limited-service restaurants, and 35 full-service restaurants in the Minneapolis/St. Paul metropolitan area. The more rigorous design of this study provides improved confidence in the findings and reduces the likelihood of systematic bias. RESULTS The median reduction in PM₂.₅ was greater than 95% for all three venue types. Examination of data from repeated visits shows that making only one pre-ban visit to each venue would greatly increase the range of computed percentage reductions and lower the statistical power of pre-post tests. Variations in PM₂.₅ concentrations were found based on time of day and day of week when monitoring occurred. CONCLUSIONS These comprehensive measurements confirm that smoking bans provide significant reductions in SHS constituents, protecting customers and workers from PM₂.₅ in bars and restaurants.

[1]  B. Lindgren,et al.  Tobacco Smoke Exposure in Nonsmoking Hospitality Workers before and after a State Smoking Ban , 2010, Cancer Epidemiology, Biomarkers & Prevention.

[2]  Kosuke Imai,et al.  Survey Sampling , 1998, Nov/Dec 2017.

[3]  Jeffrey A Siegel,et al.  An evaluation of the indoor air quality in bars before and after a smoking ban in Austin, Texas , 2007, Journal of Exposure Science and Environmental Epidemiology.

[4]  Neil E Klepeis,et al.  Real–Time Measurement of Outdoor Tobacco Smoke Particles , 2007, Journal of the Air & Waste Management Association.

[5]  L. Richiardi,et al.  Short-term effects of Italian smoking regulation on rates of hospital admission for acute myocardial infarction. , 2006, European heart journal.

[6]  Giorgio Cattani,et al.  Exposure to fine and ultrafine particles from secondhand smoke in public places before and after the smoking ban, Italy 2005 , 2007, Tobacco Control.

[7]  Miriam Byrne,et al.  HOW DOES THE IRISH SMOKING BAN MEASURE UP? A BEFORE AND AFTER STUDY OF PARTICLE CONCENTRATIONS IN IRISH PUBS , 2005 .

[8]  James L. Repace,et al.  BMC Public Health BioMed Central Research article Air pollution in Boston bars before and after a smoking ban , 2006 .

[9]  M. Sohn,et al.  Indoor Measurements of Environmental Tobacco Smoke Final Report to the Tobacco Related Disease Research Program , 2004 .

[10]  F. Forastiere,et al.  Effect of the Italian Smoking Ban on Population Rates of Acute Coronary Events , 2008, Circulation.

[11]  M. Travers Smoke-free air policy: Changing what's in the air and in the body , 2008 .

[12]  Robin E. Soler,et al.  Smokefree policies to reduce tobacco use. A systematic review. , 2010, American journal of preventive medicine.

[13]  Paul Switzer,et al.  Particle Concentrations Inside a Tavern Before and After Prohibition of Smoking: Evaluating the Performance of an Indoor Air Quality Model. , 1996, Journal of the Air & Waste Management Association.

[14]  N. Hanna,et al.  Respiratory Symptoms, Pulmonary Function, and Markers of Inflammation Among Bar Workers Before and After a Legislative Ban on Smoking in Public Places , 2008 .

[15]  Stanton A Glantz,et al.  Reduced incidence of admissions for myocardial infarction associated with public smoking ban: before and after study , 2004, BMJ : British Medical Journal.

[16]  L. Bates ENVIRONMENTAL TOBACCO SMOKE: MEASURING EXPOSURES AND ASSESSING HEALTH EFFECTS , 1987 .

[17]  J. Daisey Tracers for assessing exposure to environmental tobacco smoke: what are they tracing? , 1999, Environmental health perspectives.

[18]  Jon G Ayres,et al.  Secondhand smoke levels in Scottish pubs: the effect of smoke-free legislation , 2007, Tobacco Control.

[19]  Luke Clancy,et al.  Effects of the Irish smoking ban on respiratory health of bar workers and air quality in Dublin pubs. , 2007, American journal of respiratory and critical care medicine.

[20]  H. Kesteloot,et al.  Environmental tobacco smoke. Measuring exposures and assessing health effects : by B. Hulka (Ed.) National Academy Press, Washington, D.C., 1986 337 pp. [pound sign]19.20 , 1987 .

[21]  F. Forastiere,et al.  Response to Letter Regarding Article, “Effect of the Italian Smoking Ban on Population Rates of Acute Coronary Events” , 2008 .

[22]  James L. Repace,et al.  Respirable Particles and Carcinogens in the Air of Delaware Hospitality Venues Before and After a Smoking Ban , 2004, Journal of occupational and environmental medicine.

[23]  B. Tomkins,et al.  Development and Application of Protocols for the Determination of Response of Real-Time Particle Monitors to Common Indoor Aerosols , 2004, Journal of the Air & Waste Management Association.

[24]  Simon J. Sheather,et al.  Confidence intervals based on interpolated order statistics , 1986 .

[25]  R A Jenkins,et al.  Occupational exposure to environmental tobacco smoke: results of two personal exposure studies. , 1999, Environmental health perspectives.

[26]  R. Maronpot,et al.  The carcinogenic potential of the gas phase of environmental tobacco smoke. , 1997, Carcinogenesis.

[27]  N. Klepeis,et al.  An introduction to the indirect exposure assessment approach: modeling human exposure using microenvironmental measurements and the recent National Human Activity Pattern Survey. , 1999, Environmental health perspectives.

[28]  M. Eisner,et al.  Bartenders' respiratory health after establishment of smoke-free bars and taverns. , 1998, JAMA.