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Impact of a Citywide Benchmarking Intervention on Colonoscopy Quality Performance



There is marked variability in colonoscopy quality, limiting its effectiveness in colorectal cancer prevention. Multiple indicators have been established as markers for colonoscopy quality; however, there are conflicting data on the effects of quality reporting programs on endoscopist performance. In this study, we investigate the impact of a multicenter quarterly report card initiative on colonoscopy quality metric performance.


Data were collected from 194 endoscopists at 10 participating sites throughout New York City using a Qualified Clinical Data Registry from January 2013 to December 2014. Adenoma detection rate (ADR), cecal intubation rate, withdrawal time, bowel preparation quality and appropriate interval recommendations were tracked. Report cards were distributed to each site on a quarterly basis and technical assistance was provided as needed. Performance trends were analyzed using the Cochran–Armitage trend and analysis of variance tests.


37,258 screening colonoscopies were performed during the study period. There was a positive performance trend for ADR over time from the first quarter of 2013 to the last quarter of 2014 (15.6–25.7%; p < 0.001). There were also increases in cecal intubation rates (78.2–92.6%; p < 0.001), bowel preparation adequacy rates (77.5–92.8%; p < 0.001), and adherence to appropriate screening intervals (28.0–55.0%; p < 0.001). There was no clinically significant change in mean withdrawal time.


The implementation of a quarterly report card initiative resulted in statistically significant improvements in adenoma detection, cecal intubation, bowel preparation adequacy rates, and appropriate recommended screening intervals.

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This initiative was supported by the Centers for Disease Control: IU58DP0000783.

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Correspondence to Eugenia N. Uche-Anya.

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Uche-Anya, E.N., Brown, J.J., Asumeng, C. et al. Impact of a Citywide Benchmarking Intervention on Colonoscopy Quality Performance. Dig Dis Sci (2020). https://doi.org/10.1007/s10620-020-06067-y

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  • Colorectal cancer screening
  • Colonoscopy quality
  • Colon cancer prevention