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Table 1: 
Characteristics of the study population
CharacteristicValue
Age (mean) (yr)52 ± 11
Sex: female86% (24/28)
Hunt and Hess scale score (mean)2.89 ± 0.79
Time to CTP (mean) (days)a8.2 ± 5.1
Aneurysm siteb
    Basilar3.6% (1/28)
    ICA35.7% (10/28)
    AcomA14.3% (4/28)
    ACA3.6% (1/28)
    MCA32.1% (9/28)
    PcomA25% (7/28)
    Multiple25% (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.