Cox proportional hazards analysis of factors associated with overall survival.

Abbreviations: CEA, carcinoembryonic antigen; HR, hazard ratio; CI, confidence interval.
*Age, gender, CEA levels, tumor differentiation, stage, lymphovascular invasion, perineural invasion, lymph node involvement, and genetic risk classification by Wnt pathway gene polymorphisms were included in the multivariate analysis.
P<0.05 are in boldface.