Table 3.

prediction of thyroid malignancy using TIRADS in some of the proposed studies.

Series	N° Cases	Sensitivity	Specificity	PPV	NPV	Diagnostic Accuracy	ROM (Ranged According to the Cytologic Categories)
Shayganfar [25]	239	91.7%	52.8%	/	/	/	0−25%
Barbosa [26]	140	95.3%	84.6%	87%	94%	90.2%	20−92.9%
Zhang [27]	319	86.7%	91.4%	75.6%	95.3%	96%	0−90.5%
Maia [28]	242	80%	84%	71%	90%	66.7%	8.7%−77%
Rocha [29]	143	80.4%	94%	52.4%	95%	/	0−72%
Chaigeau [30]	602	95%%	/	77.6%	55%	/	20−100%
Rahal [32]	1000	/	/	/	/	/	16−92%
Grani [33]	502	83.3%	56.2%	12.8%	97.8%	/	2−20%
Wu [39]	346	96%	53%	76%	89%	79%

PPV: positive predictive value, NPV = negative predictive value; ROM = risk of malignancy