Table 5.

Diagnostic performance of ultrasonographic presence of contact for predicting extrathyroidal extension of papillary thyroid carcinomas

Characteristic	Sensitivity, %	Specificity, %	NPV, %	PPV, %	OR (95% CI)	Az (95% CI)
3D C1	94.1	45.3	96.0	35.6	13.241 (1.635-107.209)	0.697 (0.569-0.825)
2D C1	94.1	41.5	95.7	34.0	11.355 (1.400-92.066)	0.678 (0.547-0.809)

NPV, negative predictive value; PPV, positive predictive value; OR, odds ratio; CI, confidence interval; Az, area under the curve; 3D, three-dimentional; C1, presence of contact; 2D, two-dimentional.