Why the study?
Global and regional trends in subarachnoid hemorrhage burden and associated cross-country socioeconomic inequalities had not been comprehensively evaluated across 1990 to 2021.
Population
Global population across 204 countries and territories with subarachnoid hemorrhage
Comparison
Stratification by Socio-Demographic Index, sex, and region from 1990 to 2021
Design
Population-based study using Global Burden of Disease 2021 data
Key result
From 1990 to 2021, global age-standardized incidence, prevalence, DALY, and mortality rates for subarachnoid hemorrhage declined significantly, despite an increase in absolute cases.
Authors
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May support ongoing SAH prevention for clinicians; leaves open causal factors and socioeconomic inequalities for research.
Observational
While absolute cases of subarachnoid hemorrhage are increasing globally due to population growth and aging, age-standardized rates are declining, though the burden is increasingly shifting toward socioeconomically disadvantaged populations.
Li et al. (2026) conducted an observational in Subarachnoid hemorrhage. From 1990 to 2021, global age-standardized incidence, prevalence, DALY, and mortality rates for subarachnoid hemorrhage declined significantly, despite an increase in absolute cases.