Patient background and aneurysm characterization
| Number of patients | 89 |
| Mean±SD (range) age, years | 60.6±12.2 (31–84) |
| Female | 64 (71.9%) |
| Number of aneurysms | 92 |
| Unruptured aneurysms | 34 (37.0%) |
| Ruptured aneurysms | 58 (63.0%) |
| WFNS grade | |
| 1 | 19 (32.8%) |
| 2 | 12 (20.7%) |
| 3 | 0 (0%) |
| 4 | 11 (19.0%) |
| 5 | 16 (27.6%) |
| Total | 58 (100%) |
| Aneurysm location | |
| Anterior circulation | 70 (76.1%) |
| ICA | 46 (50.0%) |
| ACA | 16 (17.3%) |
| MCA | 8 (8.7%) |
| Posterior circulation | 22 (23.9%) |
| VA | 10 (10.9%) |
| BA | 11 (12.0%) |
| PCA | 1 (1.1%) |
| Aneurysm size | |
| Mean±SD (range) volume, mm3 | 131.3±171.6 (4.2–867.3) |
| Mean±SD (range) maximum diameter, mm | 6.4±2.7 (2.0–14.0) |
| Mean±SD (range) dome to neck ratio | 1.86±0.73 (1.0–4.50) |
ACA, anterior cerebral artery; BA, basilar artery; ICA, internal carotid artery; MCA, middle cerebral artery; PCA, posterior cerebral artery; VA, vertebral artery; WFNS, World Federation of Neurosurgical Societies.