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Table 2: Pattern of subarachnoid hemorrhage and the presence of intraventricular hemorrhage
All Men Women
Pattern of SAH 
    None 29 (13%) 15 (14%) 14 (12%)
    Perimesencephalic 71 (31%) 38 (34%) 33 (28%)
    Sulcal 37 (16%) 15 (14%)^{^a} 22 (18%)
    Diffuse 93 (40%) 43 (39%) 50 (42%)
Xanthochromia on lumbar puncture 16 (7%) 8 (7%) 8 (7%)
Isolated intraventricular hemorrhage 13 (6%) 7 (6%) 6 (5%)
↵a P = .0001 by Fisher exact test.