Table 3.
Comparison of clinicopathological characteristics between patients with multifocal PTCs and those with unifocal tumor after propensity score matching.
| Characteristics | Univariate Analysis | Multivariate Analysis | ||
|---|---|---|---|---|
| HR (95% CI) | p-Value | HR (95% CI) | p-Value | |
| Age (years) | 0.982 (0.952–1.012) | 0.239 | ||
| Male sex | 2.974 (1.433–6.170) | 0.003 | 2.185 (1.047–4.559) | 0.037 |
| Tumor size (cm) | 2.340 (1.833–2.987) | <0.001 | 1.806 (1.337–2.441) | <0.001 |
| Microscopic ETE | 2.708 (1.186–6.182) | 0.018 | 1.311 (0.551–3.122) | 0.541 |
| LN metastasis | ||||
| N1a | 3.858 (1.587–9.380) | 0.003 | 1.859 (0.677–5.102) | 0.229 |
| N1b | 12.704 (5.066–31.857) | <0.001 | 3.603 (1.207–10.757) | 0.022 |
| Margin involvement | 2.071 (0.497–8.628) | 0.317 | ||
| Hashimoto thyroiditis | 0.643 (0.282–1.467) | 0.294 | ||
| 131I remnant ablation | 6.512 (2.709–15.656) | <0.001 | 2.345 (0.807–6.811) | 0.117 |
| Multifocality | 2.294 (1.183–4.451) | 0.014 | 1.986 (1.015–3.888) | 0.045 |
HR, hazard ratio; CI, confidence interval; ETE, extrathyroidal extension; LN, lymph node.