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Key PointsQuestionWhat are the associations between physician adenoma detection rates and patients’ risk of postcolonoscopy colorectal cancer across a broad range of adenoma detection rate values?FindingsIn a retrospective cohort study of 735 396 patients with 852 624 colonoscopies without detection of cancer, higher physician adenoma detection rates were significantly associated with a lower risk of postcolonoscopy colorectal cancer (hazard ratio, 0.97 per 1% absolute adenoma detection rate increase) across a broad range of adenoma detection rate values.MeaningThe inverse associations between adenoma detection rates and postcolonoscopy colorectal cancers extend to higher adenoma detection rate values than commonly reported; these findings, with other factors, can inform targets for colonoscopy quality.

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