CEACAM5 and neoplasm: After adjusting for other prognostic factors, such as race, gender, tumor location, age at diagnosis, and year of diagnosis, however, the results of multivariate Cox analysis indicated that, in CEA-elevated group, receiving or not receiving ACT did not presented statistically CSS difference (HR = 0.940, 95% CI = 0.804–1.097, P = 0.431).