Table 3. Multivariate analysis of predictors of lymph node metastasis.
Variable | Hazard ratio | 95% confidence interval | P value |
Age | 1.040 | 0.660–1.641 | 0.865 |
Tumor size | 1.968 | 1.043–3.713 | 0.037 |
Vascular tumor emboli | 4.056 | 2.493–6.599 | 0.000 |
Depth of invasion | 1.517 | 1.013–2.271 | 0.043 |