What is the difference between the incidence of intracranial hemorrhage (ICH) in women versus men?
Differences by race/ethnicity have been noted, with higher ICH incidence rates in blacks and in Hispanics than whites for both women and men. Autopsy and angiographic studies have documented a higher prevalence of cerebral aneurysms in women, as well as a higher risk of aneurysmal subarachnoid hemorrhage (SAH). A population-based case-control study showed that the risk of SAH was lower in women with first pregnancy after 23 years of age and in those who had ever used hormone therapy (HT). However, before age 50 years, aneurysmal SAH is more common in men.