Worldwide Incidence of Aneurysmal Subarachnoid Hemorrhage According to Region, Time Period, Blood Pressure, and Smoking Prevalence in the Population

Subarachnoid hemorrhage (SAH) from ruptured intracranial aneurysms is a subset of stroke with high fatality and morbidity. Better understanding of a change in incidence over time and of factors associated with this change could facilitate primary prevention.To assess worldwide SAH incidence according to region, age, sex, time period, blood pressure, and smoking prevalence.We searched PubMed, Web of Science, and Embase for studies on SAH...