Abstract
Objective To systematically assess the efficiency of colonoscopy screening for the asymptomatic elderly. Methods A search was performed to identify studies related to colonoscopy screening for the aged in Pubmed and Embase. The key words used for the search included colorectal neoplasm, adenoma, screening, elderly, and colonoscopy.The detection rate of colorectal adenomas, advanced adenomas, colorectal cancer in the elderly and non-elderly were extracted.The studies were evaluated and analyzed by software RevMan 5.3. Results Twelve studies involving 312 111 cases were included(25 107 elderly and 287 004 non-elderly). The total AADR of the elderly was 9.97%, ADR was 11.33%, while CRC detection rate was 1.79%. The meta-analysis showed that there were significant differences in the AADR(RR=1.57, 95%CI: 1.51-1.64), ADR(RR=1.22, 95%CI: 1.19-1.25) and CRC detection rate(RR=2.6, 95%CI: 2.34-2.90) between the elderly and the younger patients(P<0.000 01). The detection rate of AADR, ADR, CRC in the elderly were significantly higher than the non-elderly. Conclusion The elderly have higher AADR and CRC detection rate than the younger. But further studies are needed because life expectancy and complications are factors that need to be considered for screening. Key words: Colonic neoplasms; Screening; Aged; Colonoscopy
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