Greater proportions of males (71.4%), elders (51.4%), comorbid UDTBDs (30.2%), family history of gastric cancer (6.3%), anemia (35.7%), CEA seropositivity (21.3%), and CA19-9 seropositivity (19.9%) were found in the gastric cancer group (p < 0.05) (Table 1). This evidence concerns the gene CEACAM5 and anemia.