Concordance of HIR20 and HIR4 models with original HIR model.
Patients were stratified by HIR20 model (A) or HIR4 model (B). All patients (n = 396) are plotted in the left panel, those with early recurrence (≤2 y) in the middle panel, and those with late recurrence (>2 y) in the right panel. p-Values were obtained from the log-rank test. Vertical lines denote observations that were censored owing to loss to follow-up or on the date of the last contact.