Table 4.
Risk stratification model for thyroid nodules > 4 cm.
| Patterns | Points | Risk value | No. malignant nodules (malignancy rate, %) | |
|---|---|---|---|---|
| training dataset (n = 29) | Validation dataset (n = 21) | |||
| High risk | 9 (90.0) | 8 (88.9) | ||
| More than 3 factors | 190-290 | 0.8-0.9 | ||
| Intermediate risk | 8 (42.1) | 5 (35.7) | ||
| 2 factors | 120-170 | 0.4-0.7 | ||
| Microcalcification | 100 | 0.34 | ||
| Low risk | 12 (10.8) | 8 (6.9) | ||
| Solid | 70 | 0.21 | ||
| Ill-defined border | 70 | 0.21 | ||
| Hypoechoic | 50 | 0.14 | ||
The four significant factors were microcalcification, solid, ill-defined border, and hypoechoic.