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Univariate analyses of characteristics of stenosis hypothesized to be associated with stent failure, and any stroke and death within 30 days
Characteristics of Stenosis Stent Failure-No. (%) P 30-Day Stroke and Death-No. (%) P
Stenosis: >70% (n = 25), 2 (8.0) NS 2 (8.0) NS
    50%–69% (n = 23) 2 (8.7) 1 (4.3) 
Length: >10 mm (n = 12), 3 (25.0) .043 1 (8.3) NS
    <10 mm (n = 36) 1 (2.8) 2 (5.6) 
Access tortuosity: severe (n = 17), 4 (23.5) .012 1 (5.9) NS
    Mild (n = 12)/moderate (n = 19) 0 (0) 2 (6.5) 
Bifurcation lesion: 2 (8.7) NS 1 (4.3) NS
    Yes (n = 23) 
    No ( n= 25) 2 (8.0) 2 (8.0) 
Site: anterior circulation (n = 28) 2 (7.1) NS 2 (7.1) NS
    MCA (n = 20) 2 2 
    ICA (n = 8) 0 0 
Posterior circulation (n = 20) 2 (10.0) 1 (5.0) 
    BA (n = 11) 0 1 
    VA (n = 9) 2 0 
Note:—BA indicates basilar artery; MCA, middle cerebral artery; ICA, intracranial internal carotid artery; VA, intracranial vertebral artery; NS, no significance.