Colon to Rectum

Gastrointest Endosc. 2023;97(3):537–43.e2

Desai M, Rex DK, Bohm ME, Davitkov P, DeWitt JM, Fischer M, Faulx G, Heath R, Imler TD, James-Stevenson TN, Kahi CJ, Kessler WR, Kohli DR, McHenry L, Rai T, Rogers NA, Sagi SV, Sathyamurthy A, Vennalaganti P, Sundaram S, Patel H, Higbee A, Kennedy K, Lahr R, Stojadinovikj G, Campbell C, Dasari C, Parasa S, Faulx A, Sharma P

Impact of withdrawal time on adenoma detection rate: Results from a prospective multicenter trial


Background and aims: Performing a high-quality colonoscopy is critical for optimizing the adenoma detection rate (ADR). Colonoscopy withdrawal time (a surrogate measure) of ≥ 6 minutes is recommended; however, a threshold of a high-quality withdrawal and its impact on ADR are not known.
Methods: The authors examined withdrawal time (excluding polyp resection and bowel cleaning time) of subjects undergoing screening and/or surveillance colonoscopy in a prospective, multicenter, randomized controlled trial. They examined the relationship of withdrawal time in 1-minute increments on ADR and reported odds ratio (OR) with 95% confidence intervals (CIs). Linear regression analysis was performed to assess the maximal inspection time threshold that impacts the ADR.
Results: A total of 1142 subjects (age 62.3 ± 8.9 years; 80.5% men) underwent screening (45.9%) or surveillance (53.6%) colonoscopy. The screening group had a median withdrawal time of 9.0 minutes (interquartile range [IQR], 3.3) with an ADR of 49.6%, whereas the surveillance group had a median withdrawal time of 9.3 minutes (IQR, 4.3) with an ADR of 63.9%. ADR correspondingly increased for a withdrawal time of 6 minutes to 13 minutes, beyond which ADR did not increase (50.4% vs. 76.6%, p < 0.01). For every 1-minute increase in withdrawal time, there was 6% higher odds of detecting an additional subject with an adenoma (OR = 1.06; 95% CI: 1.02–1.10; p = 0.004).

Conclusions: Results from this multicenter, randomized controlled trial underscore the importance of a high-quality examination and efforts required to achieve this with an incremental yield in adenoma detection rate based on withdrawal time.

P. Sharma, M.D., Associate Professor of Medicine, Department of Gastroenterology, Kansas City VA Medical Center, Kansas City, MO, USA

DOI: DOI: 10.1016/j.gie.2022.09.031

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