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. 2014 Aug 19;9(8):e105112. doi: 10.1371/journal.pone.0105112

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