Multivariate analysis of potential risk factors for lymph node metastasis.
| Variables* | Odds ratio | 95% Confidence interval | P |
|---|---|---|---|
| Tumor size (<2 cm or ≤2 cm) | 9.498 | 1.214~74.335 | 0.032 |
| Histologic type (differentiated or undifferentiated) | 2.922 | 1.135~7.524 | 0.026 |
↵* Significant factors identified by univariate analysis were included in the multivariate analysis.