Table 1 Study cohort characteristics
From: Risk stratification of lateral neck recurrence for patients with pN1a papillary thyroid cancer
Characteristic | N (%) |
|---|---|
Total | 2500 |
Age | |
< 55 y | 2204(88.2) |
≥ 55 y | 296(11.8) |
Sex | |
Male | 730(29.2) |
Female | 1770(70.8) |
Extent of surgery | |
Lobectomy | 1827(73.1) |
Total thyroidectomy | 673(26.9) |
Primary tumor size | |
≤ 2 cm | 2259(90.4) |
2–4 cm | 211(8.4) |
> 4 cm | 30(1.2) |
Multifocality | 794(31.8) |
Bilaterality | 355(14.2) |
Hashimoto thyroiditis | 487(19.5) |
Extrathyroidal extension | 1315(52.6) |
Extranodal extension | 282(11.3) |
Numbers of central lymph node dissections, mean ± SD | 6.4 ± 4.2 |
Numbers of central lymph node metastases, mean ± SD | 2.6 ± 2.1 |
Central lymph node ratio, mean ± SD | 0.5 ± 0.3 |
pT stage | |
T1 | 2099(84.0) |
T2 | 145(5.8) |
T3 | 169(6.8) |
T4 | 87(3.5) |
TNM stage | |
I | 2204(88.2) |
II | 270(10.8) |
III | 26(1.0) |
Radioactive iodine treatment | 275(11.0) |