Then, comparison of the expressions of 18 prognosis‐related PRGs in STAD samples and control samples showed that, compared to control samples, SNAI2, MAGED1, LY96, IRF1, IL1R1, and CHMP4C were markedly upregulated, yet PDK4, ELANE, BMX, and ARHGAP10 were notably downregulated in STAD samples (Figure 1b). This evidence concerns the gene IRF1 and gastric adenocarcinoma.