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Table 1: Aneurysm location patterns and prevalence of contrast stasis
Location Total (n = 301) No Contrast Stasis (n = 197, 65.4%) Contrast Stasis (n = 104, 34.6%)
Internal carotid 201 (66.8%) 120 (61.0%) 81 (77.9%)
    Proximal intradural or ophthalmic 131 (43.5%) 74 (37.6%) 57 (54.8%)
    Posterior communicating 35 (11.6%) 22 (11.2%) 13 (12.5%)
    Bifurcation 13 (4.3%) 12 (6.1%) 1 (1.0%)
    Other 22 (7.3%) 12 (6.1%) 10 (9.6%)
        Anterior choroidal 7 (2.3%) 7 (3.6%) 0 (0.0%)
        Cavernous 14 (4.7%) 4 (2.0%) 10 (9.6%)
        Cervical 1 (0.3%) 1 (0.5%) 0 (0.0%)
Anterior cerebral 34 (11.3%) 25 (12.6%) 9 (8.7%)
    Anterior communicating 29 (9.6%) 23 (11.6%) 6 (5.8%)
    Proximal to anterior communicating 3 (1.0%) 0 (0.0%) 3 (2.9%)
    Pericallosal 2 (0.7%) 2 (1.0%) 0 (0.0%)
Middle cerebral 31 (10.3%) 28 (14.3% 3 (2.9%)
    Proximal to bifurcation 8 (2.7%) 8 (4.1%) 0 (0.0%)
    Bifurcation 23 (7.6%) 20 (10.2%) 3 (2.9%)
    Distal to main bifurcation 0 (0.0%) 0 (0.0%) 0 (0.0%)
Posterior circulation 35 (11.6%) 24 (12.1%) 11 (10.5%)
    Basilar bifurcation 17 (5.6%) 12 (6.1%) 5 (4.8%)
    Basilar trunk 1 (0.3%) 1 (0.5%) 0 (0.0%)
    Posterior cerebral 1 (0.3%) 1 (0.5%) 0 (0.0%)
    Superior cerebellar 5 (1.7%) 3 (1.5%) 2 (1.9%)
    Anterior inferior cerebellar 1 (0.3%) 1 (1.0%) 0 (0.0%)
    Posterior inferior cerebellar 1 (0.3%) 1 (0.5%) 0 (0.0%)
    Other 9 (3.0%) 5 (2.5%) 4 (3.8)
        Vertebral 9 (3.0%) 5 (2.5%) 4 (3.8%)