Table 2.
Prognostic variables in PTC in relation to OS and DFS
| Characteristics | OS (%) | P | DFS (%) | P |
|---|---|---|---|---|
| Gender | 0.668 | 0.001 | ||
| Male | 96.7 | 67.9 | ||
| Female | 97.7 | 82.5 | ||
| Patients’ age (years) | <0.001 | <0.001 | ||
| <45 | 98.8 | 85.8 | ||
| ≥45 | 94.2 | 66.5 | ||
| Primary tumor size (cm) | 0.002 | <0.001 | ||
| ≤1 | 100 | 91.5 | ||
| >1 and ≤2 | 100 | 89.2 | ||
| >2 and ≤4 | 96.8 | 79.9 | ||
| >4 | 90.3 | 40.3 | ||
| Lymph node status | <0.001 | <0.001 | ||
| N0 | 100 | 94.9 | ||
| N1 | 91.8 | 49.1 | ||
| Development of DM | <0.001 | – | – | |
| No | 98.6 | |||
| Positive | 63.2 | |||
| Extrathyroid extension | <0.001 | <0.001 | ||
| No | 98 | 82 | ||
| Probable | 84.4 | 28 | ||
| Multifocality | 0.94 | 0.002 | ||
| No | 97 | 79.9 | ||
| Yes | 94.1 | 55.9 | ||
| Subtypes | 0.15 | 0.642 | ||
| Classic | 98 | 98 | ||
| Follicular | 94.4 | 94.4 | ||
| Others* | 100 | 100 |
*, Including encapsulated tall and columnar cell variants. PTC, papillary thyroid carcinoma; OS, overall survival; DFS, disease-free survival; DM, distant metastasis.