Multivariate analysis for drug allergy and the risk of lymph node metastasis^*.

CI: confidence intervals; OR: odds ratios. *457 patients were included because the data were not available for 12 patients. Carcinoembryonic antigen (CEA) was excluded because those were not available in 77 patients and preliminary results showed that CEA was not associated with LMN by multivariate analysis in our patients. Multivariate analysis for drug allergy and the risk of lymph node metastasis*.