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Controversy continues about whether the best approach to colorectal cancer screening is colonoscopy or noninvasive testing with fecal occult blood testing.
To investigate further, researchers randomized patients aged 50 to 69 in Spain to undergo one-time colonoscopy or fecal immunochemical testing (FIT) every 2 years. Of 27,792 patients invited to undergo colonoscopy, 5649 (20.3%) accepted. Of 27,642 patients invited to undergo FIT, 9353 (33.8%) accepted. Colorectal cancer was found in 30 patients in the colonoscopy group and 33 in the FIT group (0.1% of each group using intent-to-screen analysis). Advanced adenoma detection rates were 1.9% in the colonoscopy group and 0.9% in the FIT group. Nonadvanced adenoma detection rates were 4.2% in t…