Table 2.

Different plaque characteristics among symptomatic and asymptomatic internal carotid stenosis.

	sICAS (n = 95)	aICAS (n = 64)	p-value
PLAQUE ECHOLUCENCY, n (%)†
Echolucent	38 (43.2 %)	15 (24.6 %)	0.02‡
Mixed	14 (15.9 %)	5 (8.2 %)	0.17‡
Echogenic	36 (40.9 %)	41 (67.2 %)	0.002‡
SEVERITY OF STENOSIS§
<70 %, n (%)	30 (31.9 %)	55 (87.3 %)	<0.001||
≥70 %, n (%)	64 (68.1 %)	8 (12.7 %)
PLAQUE LENGTH IN DUPLEX, MEDIAN (IQR), mm
All degrees	17 (12–20)	16 (12–19)	0.66
ICAS <70 %	17 (15–20)	15 (12 –19)	0.14
ICAS ≥70 %	15 (12–19)	18 (11–20)	0.52
ICAS <90 %	16 (12–19)	18 (15–21)	0.03
ICAS 90 %	13 (10–16)	11, 21¶	¶

Values are presented as median (interquartile range) or number (%).

aICAS: asymptomatic internal carotid artery stenosis, IQR, interquartile range, sICAS: symptomatic internal carotid artery stenosis.

^†In 10 arteries, the available ultrasound images were insufficient to classify plaque echolucency.

^‡Statistical analysis for a difference between the mentioned type versus. both other types.

^§In two arteries, the available ultrasound images were insufficient to classify the degree of stenosis.

^¶Difference between the distribution of ICAS <70% and ≥70% among sICAS and aICAS.

^¶We had only two available arteries with asymptomatic 90% ICAS, hence statistical analysis was not possible.

^||Difference between the distribution of ICAS <70% and ≥70% among sICAS and aICAS.