Table 1:

Patient characteristics^{^a}

	Overall	Symptomatic	Asymptomatic	P Value
Total patients included	449	225	224
Total arteries included	449	225	224
Mean age (SD) (yr)	66.4 (16.3)	67.2 (13.1)	65.6 (18.9)	.30
Male (No.) (%)	245 (54.6)	150 (66.7)	95 (42.4)	<.0001
Comorbidities
Coronary artery disease (No.) (%)	110 (24.5)	69 (30.7)	41 (18.3)	.003
Hypertension (No.) (%)	269 (59.9)	154 (68.4)	115 (51.3)	.0002
Hyperlipidemia (No.) (%)	287 (63.9)	177 (78.7)	110 (49.1)	<.0001
Diabetes mellitus (No.) (%)	82 (18.3)	56 (28.9)	26 (11.6)	.0003
Peripheral artery disease (No.) (%)	29 (6.5)	17 (7.6)	12 (5.4)	.44
Obstructive sleep apnea (No.) (%)	85 (18.9)	17 (7.6)	12 (5.4)	.44
Ever smoker (No.) (%)	203 (45.2)	125 (55.6)	78 (34.8)	<.0001
Current smoker (No.) (%)	45 (10.0)	29 (12.9)	16 (7.1)	.06
Mean body mass index (SD)	28.3 (5.3)	28.5 (4.8)	28.1 (5.7)	.39
Imaging characteristics
Arteries without presence of atherosclerotic plaque^{^b} (No.) (%)	202 (45.0)	47 (20.9)	155 (69.2)	<.0001
Mean degree of stenosis^{^c} (SD)	23.8 (33.6)	33.5 (35.2)	14.0 (28.8)	<.0001
Presence of IPH^{^d} (No.) (%)	71 (15.8)	55 (24.4)	16 (7.1)	<.0001

↵a P values pertain to the differences in values between asymptomatic and symptomatic groups.
↵b As mentioned by radiology reports.
↵c Degrees of stenosis were based on NASCET criteria.⁵
↵d Intraplaque hemorrhage was defined as being hyperintense on MPRAGE with intralesional signal intensity of >150% of the ipsilateral sternocleidomastoid muscle.