Inclusion of KI67 significantly improves performance of the PREDICT prognostication and prediction model for early breast cancer

PREDICT (www.predict.nhs.uk) is a prognostication and treatment benefit tool for early breast cancer (EBC). The aim of this study was to incorporate the prognostic effect of KI67 status in a new version (v3), and compare performance with the Predict model that includes HER2 status (v2).