Clinical diagnostic value of American College of Radiology thyroid imaging report and data system in different kinds of thyroid nodules

Table 8 Diagnostic performances of ACR score, ACR TI-RADS and Kwak TI-RADS in the diagnosis of PTC from MTC

Variables	AUC area (95%CI)	Cutoff	Sensitivity (95%CI)	Specificity (95%CI)	PPV (95%CI)	NPV (95%CI)	Z	P
ACR score	0.650 (0.565–0.734)	≤ 8	0.696 (0.576–0.817)	0.577 (0.506–0.647)	0.328 (0.243–0.412)	0.865 (0.805–0.925)	0.669	0.504
ACR TI-RADS	0.596 (0.527–0.664)	≤ TR4	0.321 (0.199–0.444)	0.857 (0.807–0.907)	0.400 (0.257–0.543)	0.810 (0.756–0.864)	0.345	0.730
Kwak TI-RADS	0.613 (0.545–0.681)	≤ 4b	0.268 (0.152–0.384)	0.921 (0.882–0.959)	0.500 (0.321–0.679)	0.809 (0.757–0.862)

ACR American College of Radiology, TI-RADS Thyroid Imaging Report and Data System, PPV Positive predictive value, NPV Negative predictive value, MTC Medullary thyroid carcinoma, PTC Papillary thyroid carcinoma

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