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Table 1: 
Comparison of patient demographics and angioarchitectural features between nonhemorrhage and hemorrhage groups
CharacteristicNonhemorrhage (n = 24)Hemorrhage (n = 8)P Value
Age (mean) (range) (yr)a36 (8–72)38 (15–62).76
Sex, femalea10 (50%)3 (38%).69
Spetzler-Martin gradeb.89
 I31
 II125
 III82
 IV–V10
Mean AVM volume (median) (range) (mL)a5.6, 4.2 (0.6–19.3)4.5, 2.9 (0.2–15.6).31
Small size (<30 mm)b17 (71%)6 (75%)1.00
Eloquent locationb14 (58%)4 (50%).70
Venous drainageb
 Exclusively deep3 (13%)2 (25%).58
 Any deep11 (46%)5 (63%).69
Associated arterial aneurysmb1 (4%)3 (38%).04
  • ↵a Calculated by Wilcoxon rank sum test.
  • ↵b Calculated by the Fisher exact test.