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Table 2: Subgroup analysis of acute/subacute versus chronic/incidental occlusions
Acute/Subacute (n = 16) Chronic/Incidental (n = 22) P Value
Mean age (range) (yr) 58.1 (34–77) 62.9 (37–79) .16
Male (%) 50% 50% .99
Median time between BBMRI and CTA/DSA (range) (day) 3 (0–18) 1 (0–20) .8
Occlusion site (%) .02^a
    Anterior 81.2 40.9 
    Posterior 18.8 59.1 
Hyperintensity (%) .04^a
    Grade 1 87.5 54.5 
    Grade 2 12.5 45.5 
Enhancement (%) .99
    Grade 1 12.5 18.2 
    Grade 2 87.5 81.8 
↵a Significant.

	Acute/Subacute (n = 16)	Chronic/Incidental (n = 22)	P Value
Mean age (range) (yr)	58.1 (34–77)	62.9 (37–79)	.16
Male (%)	50%	50%	.99
Median time between BBMRI and CTA/DSA (range) (day)	3 (0–18)	1 (0–20)	.8
Occlusion site (%)			.02^a
Anterior	81.2	40.9
Posterior	18.8	59.1
Hyperintensity (%)			.04^a
Grade 1	87.5	54.5
Grade 2	12.5	45.5
Enhancement (%)			.99
Grade 1	12.5	18.2
Grade 2	87.5	81.8