Abstract
Between 1955 and 1987 the average tar and nicotine yield of American cigarettes declined substantially. The average tar yield (weighted for the volume of sales of the cigarette) fell from 34 to 13 mg, and the average nicotine yield declined from 2 to 0.9 mg. Advertisements for "low yield" cigarettes often imply that the health hazards associated with smoking these cigarettes are less than the hazards associated with higher-yield cigarettes.The case–control study by Palmer and coworkers reported in this issue of the Journal shows that modern low-yield cigarettes do not reduce the risk of nonfatal myocardial infarction among women . . .