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Characteristics of patients and aneurysms, and immediate clinical and angiographic outcomes after treatment with 1-stage coiling^{^a}
Characteristics and Outcomes 
No. of patients (No. of aneurysms coiled) 167 (359)
Age (yr) (mean) (range) 57.7 ± 10.6 (30–83)
Male/female 30:137
Presentation with subarachnoid hemorrhage 35 (21.0%)
No. of aneurysms per patient (range) 2.5 ± 0.9 (2–7)
No. of coiled aneurysms per patient (range) 2.1 ± 0.4 (2–3)
No. of patients with all detected aneurysms coiled 131 (78.4%)
Location of aneurysms coiled (n = 359) 
    ICA paraclinoid 135 (37.6%)
    ICA–posterior communicating artery 56 (15.6%)
    ICA–anterior choroidal artery 26 (7.2%)
    ICA bifurcation 7 (1.9%)
    Middle cerebral artery 58 (16.2%)
    Anterior cerebral artery 44 (12.3%)
    Vertebrobasilar artery 32 (8.9%)
Aneurysm size (mm) (mean) (range) 5.6 ± 2.7 (2–21)
    <10 mm 326 (90.8%)
    10–24.9 mm 33 (9.2%)
Neck size (mm) (mean) (range) 3.3 ± 1.3 (0.4–10.0)
Wide neck (neck size ≥4 mm or dome-to-neck ratio <1.5) 233 (64.9%)
Distribution of aneurysms coiled 
    Unilateral anterior circulation 73 (43.7%)
    Bilateral anterior circulation 66 (39.5%)
    Posterior circulation 3 (1.8%)
    Unilateral anterior + posterior circulation 20 (12.0%)
    Bilateral anterior + posterior circulation 5 (3.0%)
Treatment-related morbidity (n = 167) 3 (1.8%; 95% CI, 0.24–3.83%)
Treatment-related mortality (n = 167) 1 (0.6%; 95% CI, 0.58–1.78%)
Immediate angiographic outcome 
    Complete occlusion 186 (51.8%)
    Neck remnant 134 (37.3%)
    Sac remnant 33 (9.2%)
    Coiling failure 6 (1.7%)
↵a Data are shown as number (%) except where otherwise noted.