Author Affiliations: University of Southern California (USC) Sol Price School of Public Policy and USC Schaeffer Center for Health Policy and Economics, Los Angeles.
Hurt and colleagues present a careful before-and-after study of the association of a workplace smoking ban in Olmsted County, Minnesota, with myocardial infarction and sudden cardiac death rates.1 There is no doubt that environmental tobacco smoke is a serious and immediate health hazard. Yet the authors acknowledge that their before-and-after designs are not ideal and point to their lack of data on a control area without such smoking bans.
Huesch MD. Causal Effect of Public Space Smoking Bans?. JAMA Intern Med. 2013;173(9):836-837. doi:10.1001/jamainternmed.2013.84