Characteristics of treated aneurysms in the study population
| Characteristic | Aneurysm (n = 859) |
|---|---|
| Ruptured/unruptured | 78 (9.1%)/781 (90.9%) |
| Size of aneurysm | |
| Mean (mm) | 5.2 ± 3.1 |
| Distribution (mm) | |
| –3 | 222 (25.8%) |
| 4–6 | 475 (55.3%) |
| 7–9 | 119 (13.9%) |
| 10– | 43 (5.0%) |
| Location of aneurysm | |
| Internal carotid artery | 363 (42.2%) |
| Anterior cerebral arterya | 193 (22.5%) |
| Middle cerebral artery | 207 (24.1%) |
| Vertebrobasilar artery | 96 (11.2%) |
↵a Including an anterior communicating artery aneurysm.