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Medical Decision Making, Vol. 7, No. 1, 32-46 (1987)
DOI: 10.1177/0272989X8700700108

The Workup of the Asymptomatic Patient with a Positive Fecal Occult Blood Test

Margaret L. Brandeau

David M. Eddy

Twenty-two protocols for working up an asymptomatic patient who has a positive fecal occult blood test were evaluated using existing information on the prevalences of cancers, aden omas and other conditions in such patients; the natural history of colorectal cancer; the effectiveness of screening tests; risks; and costs. The authors estimate the impacts of the 22 workup strategies on outcomes such as the chance of finding an existing cancer or adenoma, risks (bleeding and perforation), and financial costs of different strategies involving rigid sigmoidoscopy, flexible sigmoidoscopy, barium enema, and colonoscopy. Two protocols were particularly effective. The first involves performing a barium enema study and following it with colonoscopy; if colonoscopy is negative, the barium enema study should be repeated. The second is to perform colonoscopy and if it is negative, follow it with a barium enema study. Key words: colorectal cancer diagnosis; colorectal cancer screening; colorectal cancer workup; fecal occult blood test. (Med Decis Making 7:32-46, 1987)


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