Univariate and multivariate Cox proportional hazards analyses showed that Ezh2 and tumor–node–metastasis (TNM) stage were independent prognostic factors for DFS and OS in patients with gastric cancer in the qRT-PCR cohort (Additional file 1: Table S2-3), while only TNM stage was the independent prognostic factor for OS in patients with gastric cancer in the IHC cohort (Additional file 1: Table S4). The gene discussed is EZH2; the disease is gastric cancer.