In gastric cancer patients, Jiang X et al. reported increased GPS, elevated CEA and CA19-9 predicted a higher risk of postoperative mortality in both relative early-stage (stage I; P < 0.001) and advanced-stage cancer (stage II, III and IV; P < 0.001) in univariate Kaplan-Meier analysis; but in multivariate analysis, only GPS predicted postoperative mortality (OR 1.845; 95% CI 1.184–2.875; P = 0.007), not CEA (OR 1.234; 95% CI 0.955–1.595; P = 0.107) and CA19-9 (OR 1.213; 95% CI 0.916–1.605; P = 0.177) [31]. Here, CEACAM5 is linked to gastric cancer.