Patient characteristics (n=197)
| Characteristic | Mean±SD or n (%) |
|---|---|
| Age (years) | 50.9±12.2 |
| Aneurysm location | |
| Anterior cerebral | 12 (6.1) |
| Anterior communicating | 47 (23.9) |
| Basilar | 2 (1.0) |
| Internal carotid | 64 (32.5) |
| Internal carotid bifurcation | 9 (4.6) |
| Middle cerebral | 60 (30.5) |
| Posterior inferior cerebellar | 3 (1.5) |
| Side | |
| Right | 76 (38.6) |
| Left | 87 (44.2) |
| Midline | 34 (17.3) |
| Morphology | |
| Saccular | 190 (96.5) |
| Fusiform | 4 (2.0) |
| Saccular/fusiform | 3 (1.5) |
| Calcified | 8 (4.1) |
| Partially thrombosed | 10 (5.1) |
| Dome size (mm) | 7.3±5.6 |
| Neck size (mm) (n=190) | 3.9±2.1 |
| Ruptured | 143 (72.6) |
| Hunt and Hess grade | |
| 0–unruptured | 54 (27.4) |
| I | 26 (13.2) |
| II | 47 (23.9) |
| III | 53 (26.9) |
| IV | 12 (6.1) |
| V | 5 (2.5) |
| Modified Fisher grade (n=142) | |
| 0 | 1 (0.7) |
| I | 21 (14.8) |
| II | 19 (13.4) |
| III | 83 (58.5) |
| IV | 6 (4.2) |
| V | 12 (8.5) |