Sex, age, comorbidities, income levels, urbanization, menopausal status, HER2 status, nodal surgical types, AJCC clinical stage, hormone receptor status, breast surgical types, differentiation of tumor, chemotherapy, and adjuvant radiotherapy were similar after head-to-head PSM of the two groups, with no significant differences in the variables observed between the groups. This evidence concerns the gene ERBB2 and neoplasm.