CEACAM5 and gastric cancer: In subgroup analyses, the results suggested that patient characteristics (i.e., age, Borrmann type, CA199, depth of invasion, sex, histology, liver metastasis, location, nodal involvement, TNM stage, tumor size, lymphatic invasion, and peritoneal metastasis) were not associated with the prognostic effect of CEA on OS, DSS or DFS in patients with gastric cancer.