As shown in Table 4, univariate Cox regression analysis found that age, BMI, HGB, serum ALB level, CEA level, CA199 level, CA125 level, T stage, N stage, and LVI/PNI status were associated with OS of patients with stage I–III GC after curative resection (p < 0.05). This evidence concerns the gene CEACAM5 and gastric cancer.