Table 1.
Characteristics of the thyroid nodules
| Variables | Frequency (total = 898) | Percent |
|---|---|---|
| Nodule size (cm) | ||
| < 2 | 514 | 57.2 |
| ≥ 2 | 384 | 42.8 |
| Echogenicity | ||
| Hyperechogenicity | 617 | 68.7 |
| Hypoechogenicity | 221 | 24.6 |
| Isoechogenicity | 60 | 6.7 |
| Calcification | ||
| Negative | 634 | 70.6 |
| Fine calcification | 47 | 5.2 |
| Coarse calcification | 67 | 7.5 |
| Fine + coarse calcification | 138 | 15.4 |
| Rim calcification | 12 | 1.3 |
| Margin of nodule | ||
| Regular | 779 | 86.7 |
| Irregular | 82 | 9.1 |
| Ill defined | 37 | 4.1 |
| Taller-than-wide shape | ||
| Negative | 868 | 96.7 |
| Positive | 30 | 3.3 |
| Cytology | ||
| Benign | 843 | 93.9 |
| Malignant | 55 | 6.1 |