Table 2.

Comparison of baseline characteristics and clinical results between the difficult and easy groups

	Difficult	Easy	P-value
Age, years	78.0 ± 5.6	74.4 ± 10.7	0.39
Female sex	0	5	0.57
Symptomatic	4	24	0.41
Risk factors
Hypertension	1	21	0.32
Diabetes mellitus	4	18	1
Dyslipidemia	3	10	0.66
Coronary artery disease	2	16	0.42
Stenotic ratio, %	74.6 ± 16.2	69.8 ± 13.0	0.4
Aortic arch type III	0	6	0.57
SA height, mm	44.3 ± 9.6	28.1 ± 7.9	<0.01
CCA length, mm	102.9 ± 10.9	94.5 ± 1 3.5	0.14
SA topmost angle, degree	78.2 ± 24.6	92 ± 13.5	0.11
SA–CCA angle, degree	21.6 ± 7.6	47.9 ± 21.8	<0.01
Ischemic event	1	0	0.17
Puncture site complications	0	0	1

SA: subclavian artery; CCA: common carotid artery.

Values are presented as the number of patients (%). Mean values are presented as ±standard deviation.