Table 1.
Comparison of patient and tumor characteristics between the UN and CN nodule groups.
| Total (n = 370) | UN group (n = 242) | CN group (n = 128) | p-value | |
|---|---|---|---|---|
| Age | ||||
| Mean age | 39.8 ± 12.8 y | 38 ± 12.3 y | 43 ± 13.1 y | 0.001 |
| <55 | 314 (84.9%) | 213 (88%) | 101 (78.9%) | 0.020 |
| ≥55 | 56 (15.1%) | 29 (12%) | 27 (21.1%) | |
| Gender | ||||
| Female | 283 (76.5%) | 180 (74.4%) | 103 (80.5%) | 0.189 |
| Male | 87 (23.5%) | 62 (25.6%) | 25 (19.5%) | |
| Tumor size | ||||
| Mean size | 1.40 ± 0.96 cm | 1.26 ± 0.84 cm | 1.67 ± 1.12 cm | <0.001 |
| ≤1cm | 154 (41.6%) | 111 (45.9%) | 43 (33.6%) | 0.023 |
| 1-4cm | 216 (58.4%) | 131 (54.1%) | 85 (66.4%) | |
| PTC subtype | ||||
| Classical variant | 306 (82.7%) | 196 (81%) | 110 (85.9%) | 0.232 |
| Follicular variant | 64 (17.3%) | 46 (19%) | 18 (14.1%) | |
| Microscopic ETE | ||||
| Yes | 23 (6.2%) | 16 (6.6%) | 7 (5.5%) | 0.665 |
| No | 337 (93.8%) | 226 (93.4%) | 121 (94.5%) | |
| Median follow-up time | 62 (16, 85) m | 64 (16, 85) m | 57 (18, 83) m | 0.609 |
UN, unilateral nodule; CN, contralateral nodule; PTC, papillary thyroid carcinoma; ETE, extrathyroidal extension.