Table 1.
Demographic and clinicopathological characteristics of the study population.
| Characteristic | All Patients | p |
|---|---|---|
| (n = 312) | ||
| Sex, n (%) | p < 0.05 | |
| Male | 33 (10.5%) | |
| Female | 279 (89.1%) | |
| Age at initial surgery (years) | 53 (min = 18, max = 83) | p < 0.05 |
| Median (min-max) | 174 (55.77%) | |
| <55 years, n (%) | 138 (44.23%) | |
| ≥55 years, n (%) | ||
| Tumor size, n (%) | p < 0.05 | |
| pT1a | 100 (32.05%) | |
| pT1b | 66 (21.15%) | |
| pT2 | 18 (5.78%) | |
| pT3 | 123 (39.42%) | |
| pT4 | 5 (1.6%) | |
| Lymph node metastases at initial surgery, | 264(84.7%)/48(15.3%) | p < 0.05 |
| n (%) | ||
| no/yes | ||
| Variant of PTC, n (%) | p < 0.05 | |
| The classical variant | 88 (28.20%) | |
| The diffuse sclerosing variant | 30 (9.62%) | |
| Microcarcinoma | 105 (33.65%) | |
| Oxiphylic cell carcinoma | 53 (16.99%) | |
| The follicular variant | 36(11.54%) | |
| Multifocality, | 244 (78.2%)/68 (21.8%) | p < 0.05 |
| n (%) | ||
| no/yes | ||
| Extrathyroidal extension, | 182 (58.4%)/130 (41.6) | p < 0.05 |
| n (%) | ||
| no/yes | ||
| Lymphovascular invasion, | 139 (44.6%)/173 (55.4%) | p > 0.05 |
| n (%) | ||
| no/yes | ||
| Autoimmune thyroiditis, | 234 (75%)/78 (25%) | p < 0.05 |
| n (%) | ||
| no/yes |