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Table 3: 
Presentation and fistula angioarchitecture stratified by age of presentation and by patient gender
Age Gender
All Subjects n = 25 ≤2 Years Old at Presentation n = 13 >2 Years Old at Presentation n = 12 P Value Males n = 14 Females n = 11 P Value
Baseline clinical characteristics 
    Mean age ± SD 4.2 ± 5.3 y 3.6 ± 5.2 y 5.1 ± 5.7 y .51
    Median age (range) 1.2 y (1 day to 16 y) 0.62 y (1 day to 14 y) 3.0 y (21 days to 16 y) 
    Male 56% 62% 50% .70 
    CHF 32% 62% 0% .0016 43% 9.1% .09
    Seizures 32% 23% 42% .41 29% 36% 1.0
    Current or prior hemorrhage 16% 7.7% 25% .32 7.1% 27% .29
    Focal neurologic deficit 24% 31% 8.3% .32 21% 27% 1.0
    Median (range) presentation mRS 2.5 (0–5) 
    Any identified comorbidity or risk factor 48% 69% 25% .047 43% 55% .70
Baseline angioarchitecture 
    >1 arteriovenous connection 64% 100% 25% .0001 64% 64% 1.0
    >1 brain vascular lesion 32% 31% 33% 1.0 21% 45% .39
Feeding artery aneurysm(s) 8% 0% 17% .22 14% 0% .49
    >1 arterial territory involved 52% 85% 17% .0012 57% 45% .70
    Any deep venous drainage in any lesion 40% 54% 25% .23 43% 36% 1.0
    >1 draining vein from any lesion 48% 38% 58% .43 43% 64% .43
    Massive venous sinus dilation 23% 45% 0% .035 36% 0% .046
    Any venous sinus dilation 41% 64% 18% .081 57% 9.1% .033
    Vein of Galen dilation 26% 42% 9.1% .16 29% 18% .66