The possible related factors were included in univariate logistic regression, including gender, age, BMI, history of hypertension, history of coronary heart disease, history of diabetes, bad habits of smoking and drinking, tumor type, serum CTC count, serum albumin, NLR, ferritin, CEA, carbohydrate antigen 19-9 (CA199), carbohydrate antigen 125 (CA125), tumor marker CA72-4 (CA72-4), and cytokeratin-7 (CK-7). The gene discussed is CEACAM5; the disease is diabetes mellitus.