Comparison of surgical outcomes of patients with type IV M-AVMs
| Variables | Subtypes of type IV | P value | |
| IVa N (%) | IVb N (%) | ||
| Short-term MD | 3 (37.5) | 7 (87.5) | 0.119 |
| Long-term MD | 2 (25.0) | 7 (87.5) | 0.041 |
| Poor outcome | 2 (25.0) | 2 (25.0) | 1.00 |
| Recovery time (months) | 2.5±1.7 | 4.7±1.9 | 0.08 |
| Complications | 0 (0) | 3 (37.5) | 0.20 |
M-AVM, arteriovenous malformation located in motor-related areas; MD, motor deficit.