Table 1. Demographic and clinical characteristics of included patients.
| Characteristics | Patients diagnosed with PTMC (n=338) |
|---|---|
| Age (years), mean ± SD [range] | 44.2±11.0 [19–74] |
| <45 | 171 (50.6) |
| 46–59 | 134 (39.6) |
| ≥60 | 33 (9.8) |
| Gender, n (%) | |
| Female | 263 (77.8) |
| Male | 75 (22.2) |
| Maximal tumor size (cm), mean ± SD [range] | 0.54±0.19 [0.1–0.9] |
| Nodal involvement | |
| Right CLNM | 87 (25.7) |
| PRRLN-LNM | 28 (8.3) |
| Multifocality, n (%) | |
| Unilateral multiple lesions | 13 (3.8) |
| Bilateral multiple lesions | 36 (10.7) |
| Capsular invasion | 55 (16.3) |
| Perithyroidal invasion | 53 (15.7) |
PTMC, papillary thyroid microcarcinoma; CLNM, central lymph node metastasis; PRRLN-LNM, posterior right recurrent laryngeal nerve lymph node metastasis.