Re-detection Rate Of Colorectal Adenoma And Its Relative Risk Factors After Polypectomy

[Aim]Aim of this study was to estimate the actual re-detection rate of adenoma andits relative risk factors after polypectomy[Method]: A total of1259patients undergoing repeat colonoscopies afterpolypectomy between January2006December2012were retrospectivelyanalyzed.The initial colonoscopy was regard as the baseline colonoscopy，Dataregarding patient characteristics,polyp characteristics, withdrawal time and quality ofbowel preparation were recorded，explore the related risk factors association withthe re-detection。[Result]during the study period, a total of59491consecutive patients undergoingcolonoscopy were included，4552(7.65%)patients were diagnosed with colorectaladenoma,3241(5.44%) had non-advanced adenoma and1311(2.21%) had advancedadenoma,1259patients bad at least one additional colonoscopy six month or moretime after polypectomy,the re-detection rate of any adenoma was34.5%,28.8%hadnon-advanced adenoma and5.3%had advanced adenoma, six cancers were diagnosedon surveillance colonoscopies.the canceration rate was0.48%, the re-detection rat ofhyperplastic polyp and inflammatory polyp were respectively10.2%and3.7%。In aunivariate analysis,female patient bad a significantly high re-detection rat than malepatient;the right colon and the hole colon bad a higher re-detection rate than the leftand transverse colon,there was no significant difference between the left colon andtransverse colon;the re-detection rate of multiple polyp was significantly higher thanthe Single adenoma，it increased by the number of the adenoma;the advancedadenoma had a higher re-detection rate than non-advanced adenoma，the bigger thebaseline adenoma was the higher the re-detection was. In the multivariate model, onlythe number of polyps and quality of bowel preparation remained the significantpredictor for re-detection.[Conclusion]the surveillance colonoscopy is important in terms of the high re-detection rate after polypectomy,multiple polyp and inadequate bowel preparationincreased the risk of the re-detection rate.