Table 1. Patient demographics and indications for sonography.
| Characteristic | Colloid nodule (n=200) | PTC (n=166) |
|---|---|---|
| Female/male ratio | 155/45 | 118/48 |
| Median age (SD), years | 58 [14] | 53 [16] |
| Indication for sonography | ||
| Palpable thyroid nodule | 177 | 109 |
| Biopsy findings of concern (OSH) | 0 | 22 |
| CT abnormality | 13 | 9 |
| PET/CT uptake | 2 | 10 |
| MRI abnormality | 3 | 1 |
| Cancer screening | 0 | 11 |
| HPT | 3 | 2 |
| Hoarseness | 1 | 1 |
| Neck discomfort | 1 | 1 |
| Power/color Doppler ratio | 144/56 | 154/12 |
| Nodular size | ||
| Mean ± SD (P<0.05) | 2.3±1.5 | 1.9±1.1 |
| Median (min, max) | 1.9 (0.5, 9.8) | 1.6 (0.4, 5.9) |
OSH, outside hospital; CT, computed tomography; PET, positron emission tomography; MRI, magnetic resonance imaging; HPT, hyperparathyroidism; PTC, papillary thyroid carcinoma.