ERBB2 and neoplasm: In the same way, another study of 1,945 patients determined that luminal A tumours had a better prognostic than luminal B (HR: 1.90, 95% CI: 1.33–2.71), HER2-type (HR: 1.36, 95% CI: 0.87–2.12) and basal-like (HR: 1.58, 95% CI: 1.05–2.39).