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 IAs225 (32.51)
    Unruptured IAs467 (67.49)
IA location (No.) (%)
    Siphon218 (31.50)
        Cavernous segment45 (6.50)
        Supraclinoid segment173 (25.00)
            Ophthalmic67 (9.68)
            PcomA96 (13.87)
            Ant. chor10 (1.45)
    Postsiphon (No.) (%)474 (68.50)
        Bifurcation35 (5.06)
        MCA237 (34.25)
        AcomA170 (24.57)
        ACA/pericallosal32 (4.62)
IA size (No.) (%)
    ≤5 mm334 (48.27)
    6–10 mm233 (33.67)
    11–25 mm97 (14.02)
    >25 mm28 (4.05)

  • Note:—IA indicates intracranial aneurysm; PcomA, posterior communicating segment; Ant. chor, anterior choroidal segment; ACA, anterior cerebral artery; AcomA, anterior communicating artery.