There was no significant difference between the hazard ratio of death by menopausal status (P = 0.57); grade (P = 0.22); tumor subtype (HER2-amplified vs TN, P = 0.17; HR-positive vs TN, P = 0.99); or use of adjuvant chemotherapy (P = 0.45), adjuvant hormonal therapy (P = 0.40), or adjuvant radiation (P = 0.18). The gene discussed is ERBB2; the disease is neoplasm.