Table 1 Results of univariate analysis of Cont-CLNM in uPTC patients.
Factor | No Cont-CLNs transfer | Cont-CLNs transfer | χ2 [t] | P value |
|---|---|---|---|---|
Gender | ||||
 Male | 14.2% (34/240) | 22.5% (20/89) | 3.264 | 0.071 |
 Female | 85.8(206/240) | 77.5% (69/89) |  |  |
Age | 46.6 | 38.1 | − 5.842 |  < 0.001*** |
Size | 1.37 | 2.03 | 5.017 |  < 0.001*** |
Location | ||||
 Upper left | 9.6% (23/240) | 9.9% (8/89) | 6.572 | 0.254 |
 Left center | 26.7% (64/240) | 32.6% (29/89) |  |  |
 Lower left | 10.0% (24/240) | 9.0% (8/89) |  |  |
 Upper right | 12.5% (30/240) | 9.0% (8/89) |  |  |
 Right center | 32.1% (77/240) | 23.6% (21/89) |  |  |
 Lower right | 9.2% (22/240) | 16.9% (15/89) | ||
Margin | ||||
 Smooth | 9.2% (22/240) | 1.1% (2/89) | 6.459 | 0.011* |
 Irregular or blurred | 90.8% (218/240) | 98.9% (88/89) |  |  |
Echo | ||||
 High | 0.4% (1/240) | 0.0% (0/89) | 0.970 | 0.616 |
 Moderate low | 2.5% (6/240) | 1.1% (1/89) |  |  |
97.1% (233/240) | 98.9% (88/89) | |||
Structure | ||||
 Substantiality | 92.1 (221/240) | 89.9% (80/89) | 0.945 | 0.623 |
 Substantiality dominance | 7.5% (18/240) | 10.1% (9/89) | ||
 Cystic dominance | 0.4% (1/240) | 0.0% (0/89) | ||
Solid partial echo texture | ||||
 Uniform | 8.8% (21/240) | 13.5% (12/89) | 1.612 | 0.204 |
 Uneven | 91.3% (219/240) | 86.5% (77/89) |  |  |
Microcalcification | Â | Â | Â | Â |
 No | 45.0% (108/240) | 10.1% (9/89) | 34.484 |  < 0.001*** |
 Yes | 55.0% (132/240) | 89.9% (80/89) |  |  |
Posterior echo characteristics | ||||
 Enhanced | 0.8% (2/240) | 0.0% (0/89) | 2.343 | 0.310 |
 Attenuated | 77.1% (64/240) | 22.9% (19/89) |  |  |
 No change | 71.3% (174/240) | 28.7% (70/89) |  |  |
Orientation | ||||
 Horizontal position | 50.0% (120/240) | 52.8% (47/89) | 0.205 | 0.651 |
 Vertical position | 50.0% (120/240) | 47.2% (42/89) |  |  |
Presence of a halo sign | ||||
 Yes | 1.2% (3/240) | 0.0% (0/89) | 0.165 | 0.684 |
 No | 98.8% (237/240) | 100% (89/89) |  |  |
Benign nodules | Â | Â | Â | Â |
 No | 29.6% (71/240) | 31.5% (28/89) | 0.109 | 0.742 |
 Yes | 70.4% (169/240) | 68.5% (61/89) |  |  |
Hashimoto’s thyroiditis | ||||
 No | 53.3% (128/240) | 62.9% (56/89) | 2.421 | 0.120 |
 Yes | 46.7% (112/240) | 37.1% (33/89) | 0.120 |  |
Extrathyroid invasion | ||||
 No | 85.8% (206/240) | 87.6% (78/89) | 0.180 | 0.672 |
 Yes | 14.2% (34/240) | 12.4% (11/89) |  |  |
Ipsilateral central lymph node metastasis | ||||
 No | 57.1% (137/240) | 10.1% (9/89) | 58.030 |  < 0.001*** |
 Yes | 42.9% (103/240) | 89.9% (80/89) |  |  |
