This is a territory-wide retrospective observational cohort study using the Clinical Data Analysis and Reporting System (CDARS). We will identify patients from CDARS with colonoscopy performed from 1 January 2000 to 31 October 2020. Other relevant diagnoses, procedures, concomitant drugs, laboratory parameters and pathology results will be retrieved and studied.
The primary objective of this study is to analyze the 15-year cumulative incidence of advanced colorectal neoplasia and CRC-related mortality after the index colonoscopy.