People expected to live fewer than 10 years may get little benefit from colorectal cancer screening, according to University of California, San Francisco researchers. Their study found 10.3 years are needed to prevent one CRC death if 1,000 patients are tested, but the number increases to 2.8 prevented deaths after five years if 10,000 patients are tested. The study based findings on screening using fecal occult blood testing.

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