Use of a marginal structural model to determine the effect of aspirin on cardiovascular mortality in the Physicians' Health Study.


The 1982-1988 aspirin component of the Physicians' Health Study, a randomized trial of aspirin and beta-carotene in primary prevention of cardiovascular disease and cancer among 22,071 US male physicians, was terminated early primarily because of a statistically extreme 44% reduction in first myocardial infarction, with inadequate precision and no apparent… (More)


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