ERBB2 and neoplasm: As shown in Figure 2, the univariate logistic regression analysis in the training cohort suggested that eight factors including age (p = 0.047), age group (p = 0.026), tumor size (p < 0.001), AJCC_T stage, Ki67 index before NACT (Pre_Ki67, p = 0.011), HER2 status (p < 0.001), HR status (p < 0.001), and molecular subtype were associated with the pCR of NACT.