Table 4.

Predictive value for the scoring system and independent risk factors

Variable	Sensitivity (%)	Specificity (%)	Youden index
Smoking	24.1	89.3	0.134
Tumor type (FTC)	8	98.7	0.067
Extrathyroid extension	29.5	84.8	0.143
Lymph node metastasis number (≥4/<4)	78.6	67.9	0.465
Lymph node metastasis rate (≥53%/<53%)	69.6	82.6	0.522
pN stage (N0 or N1a/N1b)	50	80.4	0.304
The scoring system	77.7	81.2	0.589

FTC, follicular thyroid cancer; p, pathological.