OBJECTIVE: To determine whether there was a change in hospital admissions for acute myocardial infarction while a local law banning smoking in public and in workplaces was in effect. DESIGN: Analysis of admissions from December 1997 through November 2003 using Poisson analysis. SETTING: Helena, Montana, a geographically isolated community with one hospital serving a population of 68 140. PARTICIPANTS: All patients admitted for acute myocardial infarction. MAIN OUTCOME MEASURES: Number of monthly admissions for acute myocardial infarction for people living in and outside Helena. RESULTS: During the six months the law was enforced the number of admissions fell significantly (- 16 admissions, 95% confidence interval - 31.7 to - 0.3), from an average of 40 admissions during the same months in the years before and after the law to a total of 24 admissions during the six months the law was effect. There was a non-significant increase of 5.6 (- 5.2 to 16.4) in the number of admissions from outside Helena during the same period, from 12.4 in the years before and after the law to 18 while the law was in effect. CONCLUSIONS: Laws to enforce smoke-free workplaces and public places may be associated with an effect on morbidity from heart disease.
OBJECTIVE: To determine whether there was a change in hospital admissions for acute myocardial infarction while a local law banning smoking in public and in workplaces was in effect. DESIGN: Analysis of admissions from December 1997 through November 2003 using Poisson analysis. SETTING: Helena, Montana, a geographically isolated community with one hospital serving a population of 68 140. PARTICIPANTS: All patients admitted for acute myocardial infarction. MAIN OUTCOME MEASURES: Number of monthly admissions for acute myocardial infarction for people living in and outside Helena. RESULTS: During the six months the law was enforced the number of admissions fell significantly (- 16 admissions, 95% confidence interval - 31.7 to - 0.3), from an average of 40 admissions during the same months in the years before and after the law to a total of 24 admissions during the six months the law was effect. There was a non-significant increase of 5.6 (- 5.2 to 16.4) in the number of admissions from outside Helena during the same period, from 12.4 in the years before and after the law to 18 while the law was in effect. CONCLUSIONS: Laws to enforce smoke-free workplaces and public places may be associated with an effect on morbidity from heart disease.
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