Fig. 4

Prognostic risk model in PTC patients from the training set and the whole set. a, b Patients ranked by risk score, corresponding survival status and heatmap of the training set and the whole set. c, d Kaplan–Meier survival curve of PFIs of PTC patients in the training set and the whole set according to the median cutoff value. e, f ROC curves at 1, 3, and 5 years in the training set and the whole set