The results showed that CD47 [multivariate analysis: hazard ratio (HR) = 1.705; 95% confidence interval (CI) = 1.118–2.601; p < 0.01] and ARID1A (multivariate analysis: HR = 0.604; 95% CI = 0.374–0.976; p < 0.05) were independent prognostic factors for the OS of GC patients (Figure 4). This evidence concerns the gene ARID1A and gastric cancer.