Figure 2.

Cumulative colorectal cancer incidence after baseline in the low-risk group.Cumulative colorectal cancer incidence with no surveillance (censoring at first surveillance) for the whole low-risk group (A) and the lower-risk and higher-risk subgroups (B). Cumulative colorectal cancer incidence after a single surveillance visit (censoring at second surveillance) for the whole low-risk group (C) and the lower-risk and higher-risk subgroups (D). 95% CIs are shown for each curve. The higher-risk subgroup included patients with an incomplete colonoscopy or colonoscopy of unknown completeness, a tubulovillous or villous adenoma, or proximal polyps at baseline; the lower-risk subgroup included patients with none of these factors.