Colonoscopy in Health Examination:1970 Cases Analysis

Background:It has been widely recognized that the mortality of colorectal cancer could be reduced by effective intervention strategies.Aims:To investigate the prevalence of colorectal diseases in people undergoing health examination in Xinjiang Uyghur Autonomous Region and the necessity of colonoscopic screening in asymptomatic population.Methods:A retrospective analysis was carried out in asymptomatic healthy subjects who voluntarily accepted colonoscopy at Xinjiang Uyghur Autonomous Region People's Hospital from July 2009 to June 2013.Results:A total of 1 970 cases were recruited in this study.The overall detection rate of colorectal lesions was 39.4%,of which 376 cases(19.1%) had colorectal polyps,10(0.5%) had colorectal cancer and 38(1.9%) had melanosis coli.In 560 colorectal polyps detected,tubular adenoma located at left hemicolon was more frequent than other types of polyps.The prevalence of colorectal polyps was higher in males than in females(24.6% vs.11.2%,P 0.001) and increased with the advancing of age(≥50 years old vs. 50 years old:25.9% vs.14.3%,P 0.05).More polyps were detected in Han nationality than in Uyghur and Kazak(22.6% vs.10.9% and 10.9%,P 0.05).Conclusions:The prevalence of colorectal polyps is fairly high in asymptomatic healthy subjects.Males and individuals with advancing age(≥50 years old) and Han nationality are more prone to have colorectal polyps.For asymptomatic subjects above 50 years old,screening for colorectal diseases by colonoscopy is worthwhile.