Utilization and yield of surveillance colonoscopy in the continued follow-up study of the polyp prevention trial.

Clinical Gastroenterology and Hepatology : the Official Clinical Practice Journal of the American Gastroenterological Association
Adeyinka O LaiyemoRobert E Schoen

Abstract

Prospective information on the use and yield of surveillance colonoscopy is limited. We examined the use and yield of surveillance colonoscopy among participants in the Polyp Prevention Trial (PPT) after the 4-year dietary intervention trial ended. We followed a cohort of 1297 participants. We calculated the cumulative probability of posttrial colonoscopy and investigated the yield and predictive factors for adenoma and advanced adenoma recurrence over a mean time of 5.9 years. Seven-hundred seventy-four subjects (59.7%) had a repeat colonoscopy. Among 431 subjects with low-risk adenomas (1-2 nonadvanced adenomas) at baseline and no adenoma recurrence at the end of the PPT (lowest-risk category), 30.3% underwent a repeat colonoscopy within 4 years. Among 55 subjects who had high-risk adenomas (advanced adenoma and/or > or =3 nonadvanced adenomas) at baseline and again at the final PPT colonoscopy (highest-risk category), 41.3% had a colonoscopy within 3 years and 63.5% had an examination within 5 years. The cumulative yield of advanced adenoma through 6 years was 3.6% for the lowest-risk category, 38.9% for the highest-risk category, and ranged from 6.6% to 13.8% for intermediate-risk categories. An advanced adenoma at the fina...Continue Reading

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