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To the Editor In their Research Letter, Pinsky and Schoen1 evaluate the risk of colorectal cancer (CRC) among elderly patients undergoing surveillance colonoscopy. In contrast to findings from our recent study conducted on the Kaiser Permanente Southern California (KPSC) population,2 their analysis of the Study of Colonoscopy Utilization (SCU) cohort demonstrated an increased risk of subsequent CRC among patients older than 75 years compared with younger age groups.
Wu BU. Selection of Elderly Patients for Colorectal Cancer Screening. JAMA Intern Med. 2015;175(5):860-861. doi:10.1001/jamainternmed.2015.0347