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. 2016 Nov;37(11):2055–2059. doi: 10.3174/ajnr.A4857

Table 1:

Patient demographics

Variable Location, (n [%])
P Value
North America International
Total patients 407 219
No. of sites 28 15
Female sex 309 (75.9%) 131 (59.8%) <.001
Age > 55 yr 218 (53.6%) 88 (40.2%) <.001
White 350 (86.0%) 158 (72.1%) <.001
Current/previous smoker 261 (64.1%) 130 (59.4%) .24
>1 cardiovascular risk factor 124 (30.5%) 33 (15.1%) <.001
Hypertension 217 (53.3%) 83 (37.9%) <.001
Hyperlipidemia/hypercholesterolemia 122 (30.0%) 34 (15.5%) <.001
    Diabetes 43 (10.6%) 11 (5.0%) .02
    Coronary disease 63 (15.5%) 10 (4.6%) <.001
Prior cerebrovascular accident 54 (13.3%) 15 (6.8%) .02
Hunt and Hess grade 3 or 4 in ruptured patients 38/115 (33.0%) 24/113 (21.2%) .045