Basic characteristics of patients and AVMs
| Variablea | Patients (n = 408) |
|---|---|
| Age (yr) | 33.3 ± 14.1 |
| Men | 230 (56) |
| Presenting symptoms | |
| Hemorrhage | 196 (48) |
| Seizure | 115 (28) |
| Spetzler-Martin grade | |
| I | 41 (10) |
| II | 124 (30) |
| III | 143 (35) |
| IV | 81 (20) |
| V | 19 (5) |
| AVM location | |
| Cortical | 312 (76) |
| Deep | 66 (16) |
| Infratentorial | 30 (7) |
| Eloquent | 231 (59) |
| AVM characteristics | |
| Deep drainage | 159 (39) |
| Intranidal aneurysm | 55 (14) |
| Number of procedure | |
| 1 Session | 157 (38) |
| 2 Sessions | 118 (29) |
| 3 Sessions | 75 (18) |
| ≥ 3 Sessions | 58 (14) |
↵a No. (%); mean ± SD.