Table 5. Comparison of the diagnostic accuracy of the currently used risk stratification systems, SPECT/CT and one-year data at the end of follow-up (median 37 months, n = 315) in different disease stages.
| Stage I | Stage II | Stage III | Stage IV | |
|---|---|---|---|---|
| ATA risk | 57,5 | 50,0 | 22,9 | 44,7 |
| ETA risk | 71,5 | 82,1 | 11,4 | 44,7 |
| ATA after SPECT/CT | 75,2 | 67,9 | 74,3 | 68,4 |
| SPECT/CT | 84,6 | 89,3 | 94,3 | 71,1 |
| Risk at 1 year | 93,0 | 96,4 | 97,1 | 97,4 |
Risk stratification of American Thyroid Association (ATA risk), Risk stratification of European Thyroid Association (ETA risk), Risk stratification of American Thyroid Association after SPECT/CT (ATA after SPECT/CT) and SPECT/CT alone (SPECT/CT).