18F-FDG PET/CT Results
| 18F-FDG PET/CT | All patients (n = 61) | Thyroglobulin < 5 ng/mL (n = 21) | Thyroglobulin 5–10 ng/mL (n = 11) | Thyroglobulin > 10 ng/mL (n = 29) |
|---|---|---|---|---|
| Positive (n) | 30 | 4 | 5 | 21 |
| Negative (n) | 31 | 17 | 6 | 8 |
| True-positive (n) | 26 | 3 | 5 | 18 |
| True-negative (n) | 19 | 15 | 3 | 1 |
| False-positive (n) | 4 | 1 | 0 | 3 |
| False-negative (n) | 12 | 2 | 3 | 7 |
| Sensitivity (%) | 68.4 | 60.0 | 62.5 | 72.0 |
| Specificity (%) | 82.4 | 93.8 | 100 | 25.0 |
| PPV (%) | 86.7 | 75.0 | 100 | 85.7 |
| NPV (%) | 61.3 | 88.2 | 50.0 | 12.5 |
| Accuracy (%) | 73.8 | 85.7 | 72.7 | 65.5 |
PPV = positive predictive value; NPV = negative predictive value.