ERBB2 and metabolic syndrome: The results of the multivariate analysis revealed that MetS (HR = 1.874, 95% CI: 1.149–3.055, p = 0.012), HER2‐0 (compared with HER2‐positive, p = 0.029), HR‐negative (p = 0.008), and higher cN stage (p = 0.010) were associated with poorer OS (Table 4).