Characteristics of patients and aneurysms included in the portfolio
| Characteristics | |
|---|---|
| No. of cases | 221 |
| Age (mean) (range) | 51.4, 16–77 |
| Female sex | 144 (65.2%) |
| Aneurysm location | |
| Anterior circulation | 183 (82.8%) |
| Posterior circulation | 32 (14.5%) |
| No aneurysm identified | 6 (2.7%) |
| Aneurysm location | |
| Left | 58 (26.2%) |
| Right | 96 (43.4%) |
| Midline | 61 (27.6%) |
| None found | 6 (2.7%) |
| WFNS grade | |
| I | 78 (35.3%) |
| II | 51 (23.1%) |
| III | 16 (7.2%) |
| IV | 33 (14.9%) |
| V | 43 (19.5%) |
| Modified Fisher grade | |
| 1 | 44 (20.0%) |
| 2 | 29 (13.1%) |
| 3 | 65 (29.4%) |
| 4 | 83 (37.6%) |
| Treatment details | |
| Surgical clipping | 123 (55.7%) |
| Endovascular treatment | 91 (41.2%) |
| Spontaneous occlusion before treatment | 1 (0.5%) |
| No treatment | 6 (2.7%) |
| Received hypertensive therapy for vasospasm | 52 (23.5%) |
| Received balloon angioplasty for vasospasm | 26 (11.8%) |
Note:—WFNS indicates World Federation of Neurosurgical Societies.