Fig. 1. Patient flow diagram.
This flow chart shows the total number of patients identified who underwent a lower gastrointestinal endoscopy along with the relevant exclusions made to arrive at the number of patients included for analysis and the number of accrued colorectal cancer cases. a conditions reported are not mutually exclusive. b a colonoscopy is considered complete if the colonoscope has reached the caecum. c proximal colon cancer incidence is defined as cancer located between the caecum and splenic flexure, International Classification of Diseases for Oncology, third edition (ICD-O-3) codes C18.0–C18.5. d distal colorectal cancer is defined as cancer located between the descending colon and the anus, ICD-O-3 codes C18.6–C18.7; C19; C20; C21.