Table 1.
Baseline characteristics of the study cohort.
| Number | 132 |
|---|---|
| Age, years (mean ± SD) Sex, women (%) |
49.7 ± 13.9 86 (65) |
| Hereditary type, number (%) | 18 (13.7) |
| Size, cm (mean ± SD) Gross extra thyroidal extension, number (%) |
1.98 ± 1.39 25 (19) |
| Bilateral tumors, number (%) | 22 (17) |
| T stage, number (%) | |
| 1a | 35 (26.5) |
| 1b | 35 (26.5) |
| 2 | 27 (20.5) |
| 3a | 7 (5.3) |
| 3b | 17 (12.9) |
| 4a | 11 (8.3) |
| N stage, number (%) | |
| 0 | 50 (37.9) |
| 1a | 23 (17.4) |
| 1b | 59 (44.7) |
| AJCC 8th stage, number (%) | |
| I | 37 (28.0) |
| II | 13 (9.8) |
| III | 23 (17.4) |
| IVA | 59 (44.7) |
| The surgical extent of neck dissection, number (%) Central neck dissection Central + Ipsilateral neck dissection Central + Bilateral neck dissection |
37 (28.0) 69 (52.3) 26 (19.7) |
| Lymph node status Metastasized lymph nodes, number (median (IQR)) Resected lymph nodes, number (median (IQR)) Lymph node ratio, number (median (IQR)) |
2.5 (0–10) 29 (13–44) 0.122 (0–0.311) |
| Follow-up duration, years (median (IQR)) | 8.7 (5.5–12.9) |
SD, standard deviation; AJCC, American Joint Committee on Cancer; IQR, interquartile range.