Fig. 4

Bootstrap calibration curve of the nomogram for predicting pCR in breast cancer received NAC. The X-axis represents the predicted probability, and the Y-axis represents the actual probability. The validation curve shows that the trend of the predicted value is consistent with the true value, and there is a good calibration effect between the predicted value and actual observed value, indicating predictive ability of the nomogram as good. pCR: Pathological complete response; NAC: Neoadjuvant chemotherapy