To the Editor. —Giovannucci et al1 failed to consider the most important variable associated with diagnosing prostate cancer in the United States, that is, a patient-urologist encounter. In another study linking vasectomy to prostate cancer, Rosenberg et al2 failed to address the same issue. Although participants in both studies provided detailed information on various lifestyle variables, information on contact with urologists was lacking. Giovannucci et al addressed detection bias by confirming that the frequency of rectal examination was similarly high in men with and without vasectomy. Rosenberg et al questioned whether vasectomized men were more health conscious and more likely to undergo surveillance than nonvasectomized men but dismissed the possibility since the risk of prostate cancer was still increased 15 years after vasectomy, when they felt it would be unlikely that men were still undergoing regular rectal examination related to vasectomy.Men electing vasectomy may have in common
Country-Specific Mortality and Growth Failure in Infancy and Yound Children and Association With Material Stature
Use interactive graphics and maps to view and sort country-specific infant and early dhildhood mortality and growth failure data and their association with maternal
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