Taking lymph node metastasis as a dependent variable with metastasis assignment as 1 and non-metastasis assignment as 0 (Table 2), we conducted multivariate unconditional binary logistic regression analysis (SLE = 0.05, SLS = 0.10) with age, sex, smoking history, tumor size, consolidation tumor ratio, CEA level, pathologic type, lymphovascular invasion, and pleural invasion as independent variables. Here, CEACAM5 is linked to neoplasm.