Schematic representation of various reasons why patients were excluded from the study and how we arrived at the final sample size. Note: Patients with incomplete colonoscopies/poor bowel preparation were immediately rescheduled for colonoscopy. These procedures were automatically excluded based on the criteria for the computerized search of our endoscopic database and are not shown. When these patients underwent a repeat colonoscopy, then the results of this colonoscopy were included. abdo, abdominal; CRC, colorectal cancer; FDR, first-degree relative; Fe def, iron deficiency; FH, family history; IBD, inflammatory bowel disease; Wt, weight.