|
Parameters
|
Normal VFs
|
VFDs
|
P value
|
|---|
|
Gender (n)
| | |
0.729
|
|
M
|
20
|
9
| |
|
F
|
8
|
5
| |
|
Age (ys)
|
26.6 ± 9.9
|
24.8 ± 14.3
|
0.674
|
|
Side (n)
| | |
0.744
|
|
Left
|
13
|
8
| |
|
Right
|
15
|
6
| |
|
Size (mm)
|
39.8 ± 12.8
|
38.6 ± 13.4
|
0.787
|
|
Size
| | |
1.000
|
|
<3 cm (n)
|
7
|
4
| |
|
≥3 cm (n)
|
21
|
10
| |
|
Venous drainage (n)
| | |
0.165
|
|
Superficial
|
21
|
7
| |
|
Deep
|
7
|
7
| |
|
Diffuseness (n)
| | |
0.742
|
|
Compact
|
15
|
9
| |
|
Diffuse
|
13
|
5
| |
|
S-M grade
|
2.7 ± 0.8
|
2.5 ± 0.9
|
0.515
|
|
AVM-OR (mm)
|
2.9 ± 3.9
|
2.4 ± 2.7
|
0.640
|
|
AVM-OR
| | |
1.000
|
|
<5 mm (n)
|
23
|
11
| |
|
≥5 mm (n)
|
5
|
3
| |
|
AVM-VC (mm)
|
7.8 ± 9.4
|
11.3 ± 7.2
|
0.238
|
|
AVM-VC
| | |
0.102
|
|
<5 mm (n)
|
14
|
3
| |
|
≥5 mm (n)
|
14
|
11
| |
|
History of hemorrhage
| | |
0.000003
|
|
Ruptured
|
3
|
12
| |
|
Unruptured
|
25
|
2
| |
|
Chronic headache
| | |
0.042
|
|
Yes
|
14
|
2
| |
|
No
|
14
|
12
| |
|
Seizure
| | |
0.017
|
|
Yes
|
9
|
0
| |
|
No
|
19
|
14
| |
-
AVM-OR distance from AVM to optic radiation, AVM-VC distance from AVM to visual cortex, F female, M male, VFDs visual field deficits, VFs visual fields, ys years
