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Of 1076 patients with aneurysmal subarachnoid haemorrhage 674 were females and 402 males. No significant differences between females and males were seen as regards age, clinical condition on admission, pre-existing arterial hypertension and number of rebleeds. Angiographically demonstrated vasospasm was seen with a significantly higher incidence in females (p < 0.05) which may possibly explain a significantly poorer outcome in females compared with males (p < 0.05), despite the much higher rate in females of internal carotid artery aneurysms which have a significantly better prognosis compared with aneurysms at other sites.
Rosenørn et al. (Fri,) studied this question.