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American Journal of Epidemiology Vol. 128, No. 1: 56-63
Copyright © 1988 by The Johns Hopkins University School of Hygiene and Public Health

research-article

VASECTOMY AND THE INCIDENCE OF TESTICULAR CANCER

CLIFTON H. STRADER1, NOEL S. WEISS2,3 and JANET R. DALING2,3

1Hanford Environmental Health Foundation Richland, WA
2Department of Epidemiology, School of Public Health and Community Medicine, University of Washington Seattle, WA
3Division of Public Health Sciences, Fred Hutchinson Cancer Research Center 1124 Columbia Street, Seattle, WA 98104

Send reprint requests to Dr. Janet R. Daling at this address

Adult male residents of 13 counties of western Washington state in whom testicular cancer had been diagnosed during 1977–1983 (n = 333) were interviewed over the telephone regarding their history of genital tract conditions, including vasectomy. For comparison, the same interview was given to a sample of 729 men selected from the population of these counties by dialing telephone numbers at random. A higher proportion of cases than controls reported having had a vasectomy (relative risk = 1.5, 95 per cent confidence interval = 1.0–2.2). However, the association was restricted entirely to Catholic men. Whereas a history of vasectomy was reported with approximately equal frequency by Catholic and non-Catholic cases, only 6.3 per cent of Catholic controls reported such a history in contrast to 19.7 per cent of other controls. While the authors cannot rule out the possibility that there is a true difference of the effect of vasectomy on the incidence of testicular cancer as a function of religion, it seems more plausible that selective underreporting by Catholic controls has produced a spurious relation.

cryptorchism; hernia; inguinal; testicular neoplasms; varicocele; vasectomy


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H Moller, L B Knudsen, and E Lynge
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