Incidence of colorectal cancer and advanced polyps by post-polypectomy surveillance interval: Real-world evidence from Thailand

Figure 1 Patient selection and allocation flowchart based on the Strengthening the Reporting of Observational Studies in Epidemiology Guidelines of 11332 patients assessed for eligibility, 8457 were excluded (see exclusion criteria listed in the figure). The remaining 2875 post-polypectomy patients were allocated to a low-risk group (n = 1197; recommended 5-year surveillance interval) or a high-risk group (n = 1678; recommended 3-year surveillance interval). Each risk group was further subdivided by actual surveillance timing into early, usual, and late interval subgroups. CRC: Colorectal cancer.