Why the study?
Does a family history of subarachnoid hemorrhage increase the risk of spontaneous subarachnoid hemorrhage?
Population
149 patients with spontaneous subarachnoid hemorrhage and 298 control subjects matched by gender and age…
Comparison
Family history of subarachnoid hemorrhage vs No family history of subarachnoid hemorrhage
Design
Case-control
Authors
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Family history of SAH shows a nonsignificant association with risk; leaves open whether familial factors meaningfully contribute to spontaneous cases.
Does a family history of subarachnoid hemorrhage increase the risk of spontaneous subarachnoid hemorrhage?
Family history of subarachnoid hemorrhage in a first-degree relative is associated with a non-significant trend towards increased risk, suggesting familial factors account for few cases overall.
Pei Wang (1995) studied this question.
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