Table 2.

Agreement between hand-held ultrasound assessment of the internal carotid artery grading compared with reference

Degree stenosis by HIGH	Number of vessels, n (%)	Correct classification by HUD, % (95% CI)
No plaque	22 (14)	73 (52 to 88)
Intimal thickening	29 (18)	21 (10 to 38)
<50%	97 (61)	84 (75 to 90)
50%–69%	5 (3)	80 (36 to 98)
70%–99%	4 (2)	50 (15 to 88)
99%	2 (1)	0 (0 to 67)
100%	1 (1)	100 (15 to 100)

The raw agreement of correctly classified stenoses by examinations with hand-held ultrasound devices (HUD) versus reference (HIGH) is shown in percentages by the categories of the stenoses by HIGH.