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Hsu, Wen‐Feng; Su, Chiu‐Wen; Hsu, Chen‐Yang; Yen, Amy Ming‐Fang; Chen, Sam Li‐Sheng; Chiu, Sherry Yueh‐Hsia; Lee, Yi‐Chia; Hsu, Tsui‐Hsia; Lin, Li‐Ju; Chia, Shu‐Li; Wu, Ming‐Shiang; Chen, Hsiu‐Hsi; Chiu, Han‐Mo
Journal of gastroenterology and hepatology, August 2023, Volume: 38, Issue: 8Journal Article
Background and Aim Currently, some countries still acknowledge double‐contrast barium enema (DCBE) as a backup confirmatory examination when colonoscopy is not feasible or incomplete in colorectal cancer (CRC) screening programs. This study aims to compare the performance of colonoscopy and DCBE in terms of the risk of incident CRC after negative results in the fecal immunochemical test (FIT)‐based Taiwan Colorectal Cancer Screening Program. Methods Subjects who had positive FITs and received confirmatory exams, either colonoscopy or DCBE, without the findings of neoplastic lesions from 2004 to 2013 in the screening program comprised the study cohort. Both the colonoscopy and DCBE subcohorts were followed until the end of 2018 and linked to the Taiwan Cancer Registry to identify incident CRC cases. Multivariate analysis was conducted to compare the risk of incident CRC in both subcohorts after controlling for potential confounders. Results A total of 102 761 colonoscopies and 5885 DCBEs were performed after positive FITs without neoplastic findings during the study period. By the end of 2018, 2113 CRCs (2.7 per 1000 person‐years) and 368 CRCs (7.6 per 1000 person‐years) occurred in the colonoscopy and DCBE subcohorts, respectively. After adjusting for major confounders, DCBE had a significantly higher risk of incident CRC than colonoscopy, with an adjusted HR of 2.81 (95% CI = 2.51–3.14). Conclusions In the FIT screening program, using DCBE as a backup examination was associated with a nearly threefold risk of incident CRC compared with colonoscopy, demonstrating that it is no longer justified as a backup examination for incomplete colonoscopy.
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