Table 1. Cohort description.
| Characteristic | N = 211 | % | |
|---|---|---|---|
| Gender (F:M) | 150:61 | 71.1:28.9 | |
| Age at diagnosis (years) | 41 (21-77) | - | |
| Size (cm) | 2.2 (0.3-15) | - | |
| Race | |||
| White | 146 | 69.2 | |
| Black | 10 | 4.7 | |
| Latin | 51 | 24.2 | |
| Not informed | 4 | 1.9 | |
| Size (cm) | 2.2 (0.3-15) | - | |
| Total thyroidectomy | 211 | 100 | |
| Histology | |||
| PTC | 192 | 90.9 | |
| Invasive follicular variant of PTC | 13 | 6.2 | |
| Hurthle variant | 3 | 1.4 | |
| FTC | 3 | 1.4 | |
| ETE | 121 | 57.3 | |
| Multifocality | 103 | 48.8 | |
| Vascular invasion | 63 | 29.9 | |
| cN1 | 131 | 62.1 | |
| Lymph node staging | |||
| > 5 metastatic lymph nodes | 99 | 46.9 | |
| > 3 cm metastatic lymph node | 40 | 19 | |
| Central compartment only (N1A) | 91 | 43.1 | |
| Lateral compartment (N1B) | 102 | 48.3 | |
| Extra nodal extension | 15 | 7.1 | |
| Distant metastasis | 27 | 12.8 | |
| RAI | 211 | 100 | |
| Initial activity (mCi) | 150 (30-250) | - | |
| Total activity (mCi) | 200 (100-1100) | - | |
| ATA 2015 risk | |||
| Low | 21 | 9.9 | |
| Intermediate | 110 | 52.1 | |
| High | 80 | 38 | |
| Follow-up (years) | 6.2 (0.8-17) | - | |
| Final status | |||
| NED with additional therapy | 89 | 42.2 | |
| Biochemical persistent disease | 74 | 35.1 | |
| Structural persistent disease | 43 | 20.4 | |
| Deaths | 5 | 2.4 | |
PTC: papillary thyroid cancer; FTC: follicular thyroid cancer; ETE: extrathyroidal extension; NED: no evidence of disease; ATA: American Thyroid Association; RAI: radioactive iodine.