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COMMENTS & OPINIONS
A Possible Overestimation of the Effect of Aspirin—Reply
Andrew Chan, MD, MPH;
Charles S. Fuchs, MD, MPH
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In reply
Snoep et al are concerned that a "healthy user bias" may account for our finding that regular use of aspirin reduces the risk of mortality among women. They reason that women who regularly used aspirin for cardiovascular prophylaxis are more likely to have favorable lifestyle characteristics. However, as we originally reported, less than 10% of aspirin users in this cohort indicated that their reason for use was to prevent cardiovascular disease. In fact, most of the aspirin users in our study were using the drug for headaches or musculoskeletal pain.1 As Snoep et al suggest, the association of aspirin use with mortality is not likely to be confounded by other lifestyle factors among such a population. In addition, data suggesting a potential cardiovascular benefit to routine aspirin use did not emerge until the 1990s: we did not observe any . . . [Full Text of this Article] AUTHOR INFORMATION
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