Table 5 18F-FDG PET-CT findings of the included patients.
18F-FDG PET-CT | All patients | TgAb level at diagnosis (IU/mL) | Progressive increase in TgAb level (years) | ||
|---|---|---|---|---|---|
82 | <150 | ≥150 | <3 | ≥3 | |
True-positive | 54 | 13 | 41 | 22 | 32 |
False-positive | 5 | 3 | 2 | 4 | 1 |
False- negative | 10 | 8 | 2 | 7 | 3 |
True-negative | 13 | 6 | 7 | 10 | 3 |
Sensitivity | 84% | 62% | 95% | 76% | 91% |
Specificity | 72% | 67% | 78% | 71% | 75% |
Positive predictive value | 92% | 81% | 95% | 85% | 97% |
Negative predictive value | 57% | 43% | 78% | 59% | 50% |
Accuracy | 82% | 63% | 92% | 74% | 90% |
