Table 1.
Correlation between Clinical Factors and Central Lymph Node Metastasis(CLNM).
| Central Lymph Node Metastasis in CN0 patients | |||||
|---|---|---|---|---|---|
| − | + | Case number | Positive rate | P value | |
| Gender | 0.000 | ||||
| Male | 463 | 446 | 909 | 49.06% | |
| Female | 2085 | 1113 | 3198 | 34.80% | |
| Age (years) | 0.000 | ||||
| ≤25 | 50 | 110 | 160 | 68.75% | 0.000* |
| 25–35 | 322 | 339 | 661 | 51.29% | |
| 35–45 | 785 | 472 | 1257 | 37.55% | |
| 45–55 | 880 | 425 | 1305 | 32.57% | |
| 55–65 | 415 | 165 | 580 | 28.45% | |
| >65 | 96 | 48 | 144 | 33.33% | |
| Tumor size (cm) | 0.000 | ||||
| ≤0.5 | 1570 | 322 | 1892 | 17.02% | 0.000** |
| 0.5–1.0 | 1094 | 634 | 1728 | 36.69% | |
| 1.0–1.5 | 316 | 306 | 622 | 49.20% | |
| 1.5–2.0 | 113 | 168 | 281 | 59.79% | |
| >2.0 | 132 | 229 | 361 | 63.43% | |
| Lobe dissemination | 0.000 | ||||
| − | 3124 | 1448 | 4572 | 31.67% | |
| + | 101 | 211 | 312 | 67.63% | |
| Psammoma body | 0.000 | ||||
| − | 3198 | 1593 | 4791 | 33.25% | |
| + | 27 | 66 | 93 | 70.97% | |
| Tumor number | |||||
| solitary | 2597 | 1229 | 3826 | 32.12% | 0.000 |
| Multifocality | 628 | 430 | 1058 | 40.64% | |
| Bilateral | 0.598 | ||||
| − | 2207 | 1123 | 3330 | 33.72% | |
| + | 1018 | 536 | 1554 | 34.49% | |
| Capsule invasion | 0.000 | ||||
| − | 1988 | 691 | 2679 | 25.79% | |
| + | 1237 | 968 | 2205 | 43.90% | |
*Age ≤35 years versus age >35 years.
** Φ ≤ 0.5 cm versus Φ > 0.5 cm.