Characteristics of the study population (n = 44)
| Age (years) | |
| Mean (SD) | 56.9 (12.5) |
| Range | 25–90 |
| Sex: women (%) | 75 |
| Race (%) | |
| Non-Hispanic white | 93 |
| African American | 7 |
| Education: high school or technical school graduate (%) | 84 |
| Mini Mental State Exam (mean (SD)) | 23.5 (3.3) |
| Cigarette use (%) | |
| Current | 29 |
| Past | 71 |
| Hypertension (%) | 60 |
| Number of aneurysms (%) | |
| 1 | 57 |
| 2 | 27 |
| 3 | 14 |
| 4 | 2 |
| Aneurysm locations (%) | |
| Anterior circulation | 87 |
| Posterior circulation | 13 |
| Previous subarachnoid haemorrhage (%) | 30 |
| Previous aneurysm treatment (%) | 34 |