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Table 1: Baseline demographics and characteristics
IAD Embolism P Value
No. 19 32 
Age (yr) (mean) 66.89 ± 10.90 67.84 ± 10.79 .763
Female sex (No.) (%) 6 (31.6) 11 (34.4) .838
Hypertension 17 (89.5%) 21 (65.6%) .096^{^a}
Diabetes 8 (42.1%) 6 (18.8%) .071
Hyperlipidemia 11 (57.9%) 12 (37.5%) .157
Atrial fibrillation 2 (10.5%) 13 (40.6%) .023
Baseline NIHSS (median) (IQR) 14 (6–23) 22 (14.5–26.5) .097^{^b}
Intravenous rtPA 4 (21.1%) 20 (62.5%) .004
Calcification on brain CT .018
    None 3 (16.7%) 18 (58.1%) 
    Calcification in situ 5 (27.8%) 4 (12.9%) 
    Calcification proximal to the occlusion 10 (55.6%) 9 (29.0%) 
Occlusion location on CTA <.001
    Distal BA 2 (15.4%) 21 (87.5%) 
    Middle BA 5 (38.5%) 2 (8.3%) 
    Proximal BA 4 (30.8%) 0 (0%) 
    Intracranial VA 2 (15.4%) 0 (0%) 
    Other and mixed 0 (0%) 1 (4.2%) 
Presence of PcomA 16 (84.2%) 27 (84.4%) 1.000
Note:—IQR indicates interquartile range; BA, basilar artery; VA, vertebral artery; PcomA, posterior communicating artery.
↵a Fisher exact t test.
↵b Mann-Whitney U test.