Abstract
BACKGROUND: Recently, the ENDOANGEL (EN) system, a computer-assisted detection technique, and water exchange (WE) assisted colonoscopy have both been shown to increase the colorectal adenoma detection rate (ADR). OBJECTIVES: The aim of this study was to compare the ADR between EN- and WE-assisted colonoscopy. DESIGN: This was a retrospective study. METHODS: Data from patients who underwent either EN- or WE-assisted colonoscopy between October 2021 and August 2022 were analysed consecutively. The primary outcome measure was the ADR. RESULTS: The ADR was found to be similar between the EN and WE groups, with 80 out of 199 (40.2%) patients in the EN group compared to 78 out of 174 (44.8%) patients in the WE group [1.21; 95% confidence interval (CI), 0.80-1.83]. In the analysis using stabilized inverse probability treatment weighting after adjustment for confounding factors, both colonoscopy methods had similar performance in terms of ADR (1.41; 95% CI, 0.88-2.27). CONCLUSION: EN was found to be comparable to WE in terms of ADR during colonoscopy, and both methods may be effectively used in clinical practice.