Table 1. Demographic data and thyroid functions of patients with UM-PTMC.
| Variables | Total (n=115) | CLNM (+) (n=57) | CLNM (–) (n=58) | P value |
|---|---|---|---|---|
| Male/female (n) | 34/81 | 20/37 | 14/44 | 0.198 |
| Age (years) | 42.2±10.8 | 41.1±11.3 | 43.3±10.2 | 0.273 |
| BMI (kg/m2) | 24.7±3.3 | 25.0±3.5 | 24.4±3.1 | 0.315 |
| Thyroid cancer family history (n) | 3 | 1 | 2 | 1.000 |
| Smoking (n) | 7 | 3 | 4 | 1.000 |
| FT3 (pg/mL) | 3.1±0.5 | 3.1±0.5 | 3.1±0.5 | 0.280 |
| FT4 (ng/dL) | 1.3±0.5 | 1.2±0.1 | 1.3±0.7 | 0.565 |
| TSH (µIU/mL) | 2.1±1.5 | 2.0±1.2 | 2.2±1.7 | 0.437 |
| Hashimoto’s thyroiditis (n) | 30 | 11 | 19 | 0.100 |
UM-PTMC, unilateral multifocal papillary thyroid microcarcinoma; CLNM, central lymph node metastases; BMI, body mass index; FT3, free triiodothyronine; FT4, free thyroxine; TSH, thyroid stimulating hormone.