Table 5.

Malignancy by ultrasound risk^a

Characteristic	Benign (n = 276)b	Malignant (n = 5)	P Value (Fisher Exact Tests)
ATA sonographic risk (%)			0.03
High	15 (88.2)	2 (11.8)
Very low to intermediate	261 (98.9)	3 (1.1)
TIRADS risk (%)			0.02
5	13 (86.7)	2 (11.1)
<5	263 (98.9)	3 (1.1)

Abbreviations: ATA, American Thyroid Association; TIRADS, Thyroid Imaging Reporting and Data Systems.

a8 nodules with missing ultrasound risk were excluded.

bAfirma benign, non-operated nodules were considered as truly benign.