This Article  • References  • Full text PDF  • Send to a friend  • Save in My Folder  • Save to citation manager  • Permissions  Citing Articles  • Contact me when this article is cited  Related Content  • Similar articles in JAMA  Social Bookmarking   What's this?

Stephen Sidney, MD, MPH; Charles P. Quesenberry, Jr, PhD; Marianne C. Sadler; Eugene V. Cattolica, MD
The Permanente Medical Group Inc Oakland, Calif

JAMA. 1993;270(6):705.

	Since this article does not have an abstract, we have provided the first 150 words of the full text PDF and any section headings.

To the Editor.

—In their studies of the relationship of vasectomy to prostate cancer, Giovannucci et al^1,2 relied on self-report by cohort members or their wives to identify incident prostate cancers and confirmed as many of these cases as possible by request for and review of medical records. Self-report of prostate cancer may potentially result in significant underascertainment of cases. The Kaiser Permanente Study³ of vasectomy and prostate cancer afforded an opportunity to assess the potential for underascertainment. In the Kaiser Permanente Study, incident prostate cases were identified in a cohort of multiphasic health checkup (MHC) examinees by linking the medical record number of the MHC examinee to computerized tumor registry and hospitalization records, a method that does not rely on self-report. Of the 38 MHC cohort members who had a second MHC after an incident prostate cancer, 17 (45%) did not report a history of any cancer . . . [Full Text PDF of this Article]

CiteULike    Connotea    Del.icio.us    Digg    Reddit    Technorati    Twitter     What's this?