Table 3.
Evaluation of metastatic PTC according to the diagnostic modality
| Modalities | SN | SP | PPV | NPV | AC |
|---|---|---|---|---|---|
| FNAC | 89.2% (99/111) | 100%(85/85) | 100%(99/99) | 87.6%(95/107) | 93.9%(184/196) |
| Tg-FNAa | 95.5%(106/111) | 100%(85/85) | 100%(106/106) | 94.4%(85/90) | 97.4%(191/196) |
| FNAC + Tg-FNAb | 99.1%(110/111) | 100%(85/85) | 100%(110/110) | 98.8%(85/86) | 99.5%(195/196) |
Abbreviations: SN sensitivity; SP specificity; PPV positive predictive value; NPV negative predictive value; AC accuracy
aOptimal cutoff value for Tg-FNA is 55.99 ng/mL for patients with thyroids and 9.71 ng/mL for patients without thyroids
bPositive result was determined if the positive criteria were met in either criteria