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Table 1: Patient demographics and aneurysm characteristics 
No. (%), Mean (SD)
Total No. of patients 763
Sex (female) 510 (66.8)
Mean age (yr) 59.9 (SD, 11.7)
Smoking status^{^a} 
 Current 210 (31.2)
 Former 193 (28.7)
 Nonsmoker 270 (40.1)
Ruptured aneurysm 230 (30.1)
Aneurysm location 
 AcomA 223 (29.2)
 Basilar tip 123 (16.1)
 ACA 56 (7.3)
 ICA 15 (2.0)
 MCA 206 (27.0)
 PcomA 54 (7.1)
 PICA 14 (1.8)
 ICA terminus 60 (7.9)
 SCA 5 (0.7)
 VA 6 (0.8)
 PCA 1 (0.1)
Mean aneurysm neck (mm)^{^b} 4.0 (SD, 1.4)
Mean maximal diameter (mm) 6.9 (SD, 2.4)
Mean aneurysm height (mm)^{^c} 6.1 (SD, 2.3)
Mean aneurysm width (mm)^{^d} 5.8 (SD, 2.1)
Bifurcation aneurysms 639 (83.7)
Daughter sac^{^e} 215 (30.1)
Vessel from aneurysm wall^{^f} 78 (10.4)
Preprocedural AP/AC^{^g} 
 None 327 (46.6)
 Single agent 91 (12.1)
 Two agents 283 (40.4)
↵Data missing for a = 90, b = 66, c = 10, d = 4, e = 351, f = 49, g = 10, h = 62.
Note:—AcomA indicates anterior communicating artery; PcomA, posterior communicating artery; ACA, anterior cerebral artery; SCA, superior cerebellar artery; VA, vertebral artery; PCA, posterior cerebral artery; AP/AC, antiplatelets/anticoagulants.