Rates of aneurysm occlusion in meta-analysis
| Study level | Occlusion grade | All therapies | Endovascular therapies | Surgical clipping |
| All studies | Complete occlusion | 46.3 (3.6) | 39.8 (3.7) | 52.5 (9.6) |
| Level I studies | Adequate occlusion | 59.4 (12.2) | 43.8 (5.3) | 69.7 (14.3) |