Figure. Classification of Patients According to Their Evolutive Patterns by the Occurrence of a Worrisome Feature (WF) or High-Risk Stigmata (HRS).

High-grade dysplasia (HGD) and invasive cancer (Inv) rates are reported as factors of the baseline category No WF/HRS (null) here represented by X. On the right, the combined rate of HGD/Inv is reported, showing a significant increase from category 1 to category 7 (P = .004, Mantel-Haenszel test). IQR indicates interquartile range.