PREDICT estimates survival based on the average comorbidity for women with BC of a similar age rather than the individuals’ comorbidities, and may overestimate survival.38 Furthermore, our institution does not perform Ki67 measurements, which more accurately predict chemotherapy response.36 Extrapolation of current findings to clinical practice is challenging since PREDICT can only be calculated postoperatively following histological examination of the breast. Here, MKI67 is linked to breast cancer.