Table 1.
Baseline characteristics.
| Characteristics | Patients (n = 169) |
|---|---|
| Age, years (mean ± SD) | 49.4 ± 14.5 |
| Sex, n (%) | |
| female | 112 (65.1) |
| male | 60 (34.9) |
| Tumor type, n (%) | |
| sporadic | 139 (82.2) |
| hereditary (MEN2A) | 30 (17.8) |
| Extent of surgery, n (%) | |
| total thyroidectomy | 167 (98.8) |
| subtotal/near total thyroidectomy | 2 (1.2) |
| Initial CND, n (%) | |
| yes | 162 (95.9) |
| no | 7 (4.1) |
| Tumor size, cm, n (%) | |
| ≤2.0 | 118 (69.8) |
| >2.0 and ≤4.0 | 38 (22.5) |
| >4.0 | 13 (7.7) |
| Extrathyroidal extension, n (%) | |
| none/micro | 151 (89.3) |
| gross | 18 (10.7) |
| Resection margin, n (%) | |
| negative | 162 (95.9) |
| positive | 7 (4.1) |
| Central LNM, n (%) | |
| no | 98 (58.0) |
| yes | 71 (42.0) |
| Lateral LNM, n (%) | |
| no | 107 (63.3) |
| yes | 62 (36.7) |
| Preoperative serum calcitonin (pg/mL), n (%) | |
| ≤309 | 75 (44.4) |
| >309 | 94 (55.6) |
| Median follow-up, month (median, IQR) | 84 (39.5-127.5) |
SD, standard deviation; MEN2A, multiple endocrine neoplasia type 2A; CND, central lymph node dissection; LNM, lymph node metastasis; IQR, interquartile range.