Table 1

Clinical characteristics: comparison between age subgroups and anatomical subgroups

Characteristic	All patients	Age <80 years	Age ≥80 years	p Value	Favorable arch configuration	Unfavorable arch configuration	p Value
N	221	156	65		145	76
Age (years) (mean)	71.6	66.3	84.3	<0.001	69.2	76.2	<0.001
80 years and older (%)	29	0.0	100	NA	21	45	<0.001
Male (%)	61	62	60	0.831	66	51	0.031
Hypercholesterolemia (%)	79	83	69	0.026	81	74	0.184
Hypertension (%)	86	86	85	0.805	85	87	0.686
Diabetes (%)	32	35	25	0.123	33	30	0.668
History of coronary artery disease (%)	42	40	48	0.275	47	33	0.045
History of previous stroke or TIA (%)	29	28	31	0.702	27	33	0.350
Cigarette smoking—never (%)	28	24	38	0.038	28	27	0.800
Cigarette smoking—former (%)	47	42	59	0.021	45	52	0.231
Cigarette smoking—current (%)	24	33	1.6	<0.001	26	20	0.308
Contralateral occlusion (%)	4.5	5.1	3.1	0.504	2.8	7.9	0.081
Left laterality (%)	48	48	48	0.958	43	58	0.032
Type I aortic arch (%)	46	57	20	<0.001	63	13	<0.001
Type II aortic arch (%)	30	27	37	0.139	37	17	0.003
Type III aortic arch (%)	24	16	43	<0.001	0.0	70	<0.001
Bovine aortic arch (%)	23	25	20	0.459	16	37	0.002
‘Unfavorable’ arch configuration (%)	34	29	52	<0.001	0.0	100	NA
Tortuous common carotid artery (%)	16	13	22	0.134	18	12	0.239
Pseudo-occlusion (%)	4.1	5.1	1.5	0.219	5.5	1.3	0.133
Plaque ulceration (%)	33	34	31	0.644	34	32	0.740
Tortuous internal carotid artery (%)	12	11	15	0.353	13	11	0.578
Perioperative ischemic events (%)	3.2	2.3	4.5	0.428	0.7	7.9	0.007