Table 1

 Treatment of unruptured intracranial aneurysms at the University of Virginia

2000–20042000–20012003–2004
EndovascularSurgeryEndovascularSurgeryEndovascularSurgery
MRS, modified Rankin scale.
Number of patients10512117367053
Age (years)57.253.854.652.057.853.3
Location
    Posterior circulation33.3%14.9%29.4%19.4%27.1%7.5%
    Anterior circulation66.7%85.1%70.6%80.6%72.9%92.5%
Size
    <7 mm36.2%24.0%52.9%38.9%38.6%18.9%
    7–12 mm46.7%52.9%41.2%41.7%41.4%52.8%
    13–24 mm12.4%16.5%0.0%16.7%14.3%22.6%
    >25 mm4.8%4.1%5.9%2.8%5.7%5.7%
Complications
    MRS
    091.4%71.9%100.0%69.4%91.4%83.0%
    12.9%8.3%0.0%5.6%1.4%7.5%
    21.0%4.1%0.0%8.3%0.0%1.9%
    32.9%5.8%0.0%5.6%4.3%3.8%
    41.9%4.1%0.0%5.6%2.9%1.9%
    50.0%4.1%0.0%2.8%0.0%0.0%
Death0.0%1.7%0.0%2.8%0.0%1.9%