Table 1.

Summary of the clinical features of the 147 carotid endarterectomies in 139 patients with asymptomatic cervical carotid artery stenosis

Mean age, y (range)	69 (47–81)
Male/female	122/17
Preoperative risk factors	n = 139	%
Hypertension	112	82.3
Diabetes mellitus	54	37.4
Cardiovascular disease	71	51
Hyperlipidemia	82	59.1
Chronic kidney disease	30	21
Chronic obstructive plumonary disease*	27	21.7
Imaging characteristics	No. (range)	%
Left/right	78/69
Mean stenotic rate (ECST)	82.8 (60–95)
Mean bifurcation level	Lower C3 (middle C5–upper C3)
Mean plaque length (mm)	29.5 (15.0–60.0)
Mean distal end of plaque	C2/3 (middle C4–middle C2)
Vulnerable plaque	120	81.6
Contralateral carotid stenosis (> 50%)	29	19.7

^*Forced expiratory volume in 1 sec < 70%. ECST: European Carotid Surgery Trial.