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Table 1: Epidemiologic data
Variables 
Total No. of IAs (%) 692 (100)
    Mean age (yr) (54.75 ± 13.13)
Sex 
    Women with IAs (No.) (%) 457 (66.04)
        Mean age (yr) (54.66 ± 13.13)
    Men with IAs (No.) (%) 235 (33.96)
        Mean age (yr) (54.70 ± 13.16)
Rupture (No.) (%) 
    Ruptured IAs 225 (32.51)
    Unruptured IAs 467 (67.49)
IA location (No.) (%) 
    Siphon 218 (31.50)
        Cavernous segment 45 (6.50)
        Supraclinoid segment 173 (25.00)
            Ophthalmic 67 (9.68)
            PcomA 96 (13.87)
            Ant. chor 10 (1.45)
    Postsiphon (No.) (%) 474 (68.50)
        Bifurcation 35 (5.06)
        MCA 237 (34.25)
        AcomA 170 (24.57)
        ACA/pericallosal 32 (4.62)
IA size (No.) (%) 
    ≤5 mm 334 (48.27)
    6–10 mm 233 (33.67)
    11–25 mm 97 (14.02)
    >25 mm 28 (4.05)
Note:—IA indicates intracranial aneurysm; PcomA, posterior communicating segment; Ant. chor, anterior choroidal segment; ACA, anterior cerebral artery; AcomA, anterior communicating artery.