Characteristics of the study population
| Characteristic | Value |
|---|---|
| Age (mean) (yr) | 52 ± 11 |
| Sex: female | 86% (24/28) |
| Hunt and Hess scale score (mean) | 2.89 ± 0.79 |
| Time to CTP (mean) (days)a | 8.2 ± 5.1 |
| Aneurysm siteb | |
| Basilar | 3.6% (1/28) |
| ICA | 35.7% (10/28) |
| AcomA | 14.3% (4/28) |
| ACA | 3.6% (1/28) |
| MCA | 32.1% (9/28) |
| PcomA | 25% (7/28) |
| Multiple | 25% (7/28) |
| First-order cerebral arteriesc | |
| Significant vasospasm, AIFVSP (≥50% narrowing) | 56 |
| No significant vasospasm, AIFnon-VSP (<50% narrowing) | 54 |
Note:—AcomA indicates anterior communicating artery; PcomA, posterior communicating artery.
↵a Time from initial diagnosis to CTP scanning.
↵b Number of patients with an aneurysm at the specified site. Note that the total exceeds 100% because some patients had multiple aneurysms.
↵c Two cerebral arteries could not be evaluated due to streak artifacts and motion.