Fig. 5

A Confusion matrices and (B) ROC curves of Ki-67 expression level classification for different models in the training, internal validation, and external validation cohorts. A Confusion matrices of the clinical model, radiomics model, and fusion model. The color depends on the number inside the square: the higher the number, the darker the color. B ROC curves of different models for predicting Ki-67 expression levels and the results of DeLong’s tests. AUC, area under the curve; ROC, receiver operating characteristic