ERBB2 and gastric cancer: Univariate analyses showed that age and HER2 status had a statistically significant effect on the prognosis, and only HER2 positive (HR: 20.523; 95% CI: 2.281–184.687; P = 0.007) were significant independent factors of prognoses for pT1N1 GC patients using multivariate analyses (Supplementary Table S2).