About 45% decrease in detection rate of cancers compared with colonoscopy
No difference in diagnostic yield between sigmoidoscopy + FOBT vs. sigmoidoscopy alone
Barium enema detects about 30%–50% of cancers detected by colonoscopy
About 3% of patients with no distal adenomas have advanced proximal neoplasia. There is a threefold increase in this rate in patients with distal adenomas.
CT colonography may have similar sensitivity to colonoscopy in certain centers
iFOBT detects >60% and ≤90% of CRCs
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