Table 2 VF evaluation in the 42 patients with occipital AVMs
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 |