Table 1. Clinical characteristics of PTCs.
| Characteristic | PTCs with LNM | P | |
|---|---|---|---|
| No (n=66) | Yes (n=63) | ||
| Age, years | 47.85±13.36 | 41.82±13.41 | 0.835 |
| Diameter, cm | 1.01±0.41 | 1.51±0.69 | <0.001* |
| Sex, n (%) | 0.717 | ||
| Female | 48 (72.7) | 44 (69.8) | |
| Male | 18 (27.3) | 19 (30.2) | |
| Location, n (%) | 0.039* | ||
| Right lobe | 36 (54.5) | 26 (41.3) | |
| Left lobe | 29 (43.9) | 28 (44.4) | |
| Isthmus | 0 (0.0) | 2 (3.2) | |
| Bilateral | 1 (1.5) | 7 (11.1) | |
| Multifocality, n (%) | 0.006* | ||
| No | 62 (93.9) | 48 (76.2) | |
| Yes | 4 (6.1) | 15 (23.8) | |
| Short diameter of LN, mm | 3.92±1.93 | 5.02±2.06 | 0.002* |
| Long diameter of LN, mm | 5.04±2.63 | 6.91±3.45 | 0.005* |
| Long/short diameter ratio of LN | 1.29±0.46 | 1.37±0.30 | 0.258 |
| Number of LN excised | 3.53±2.90 | 8.73±8.16 | <0.001* |
| Number of LN metastasized | 0 | 3.54±3.19 | <0.001* |
| Histological subtype, n (%) | <0.001* | ||
| Classic PTC | 57 (86.36) | 55 (87.30) | |
| Follicular PTC | 8 (12.12) | 2 (3.17) | |
| Special subtype of PTC | 1 (1.52) | 6 (9.52) | |
| ETE, n (%) | <0.001* | ||
| No | 58 (87.88) | 35 (55.56) | |
| Yes | 8 (12.12) | 28 (44.44) | |
| TNM stage, n (%) | |||
| I | 58 (87.88) | 35 (55.56) | 0.008* |
| II | 8 (12.12) | 28 (44.44) | |
*, P<0.05 was considered statistically significant. PTC, papillary thyroid carcinoma; LN, lymph nodes; TNM, tumor node metastasis; ETE, extrathyroidal extension.