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Table 1 Baseline characteristics of patients with asymptomatic or symptomatic vertebral artery origin stenosis

From: Long-term outcome of vertebral artery origin stenosis in patients with acute ischemic stroke

  Total (n = 137) Vertebral artery origin stenosis P-value
Asymptomatic (n = 64) Symptomatic (n = 73)
Age, years (mean ± SD) 70.4 ± 10.3 71.5 ± 10.8 69.5 ± 9.9 0.247
Male (n,%) 73 (53.3) 40 (62.5) 33 (45.2) 0.043
Hypertension (n,%) 96 (70.1) 46 (71.9) 50 (68.5) 0.666
Diabetes (n,%) 66 (48.2) 30 (46.9) 36 (49.3) 0.776
Hyperlipidemia (n,%) 56 (40.9) 28 (43.8) 28 (38.4) 0.522
Atrial fibrillation (n,%) 6. (4.4) 4 (6.3) 2 (2.7) 0.316
Smoking (n,%) 61 (44.5) 29 (45.3) 32 (43.8) 0.862
Previous stroke history (n,%) 34 (24.8) 20 (31.3) 14 (19.2) 0.103
Coronary arterial disease 27 (19.7) 12 (18.8) 15 (20.5) 0.792
Peripheral arterial disease 5 (3.6) 2 (3.1) 3 (4.1) 0.759
ESRS (mean ± SD) 3.2 ± 1.5 3.3 ± 1.5 3.1 ± 1.4 0.339
Concurrent vertebrobasilar stenosis* 42 (30.7) 14 (21.9) 28 (38.4) 0.037
Concurrent carotid stenosis 28 (20.4) 16 (25.0) 12 (16.4) 0.215
Stroke subtype     0.304
  Small artery occlusion 39 (28.5) 21 (32.8) 18 (24.7)  
  Large artery atherosclerosis 48 (35.0) 24 (37.5) 24 (32.9)  
  Cardioembolism 11 (8.0) 6 (9.4) 5 (6.8)  
  Two or more causes 16 (11.7) 4 (6.3) 12 (16.4)  
  Negative evaluation 23 (16.8) 9 (14.1) 14 (19.2)  
  1. *indicates the presence of concurrent severe stenosis or occlusion of the contralateral vertebral artery, or tandem stenosis of intracranial vertebral artery or basilar artery.
  2. indicates the concurrent presence of more than 50% stenosis of at least one carotid artery.
  3. ESRS Essen Stroke Risk Score.