World Stroke Organization (WSO): Global intracerebral hemorrhage factsheet 2025
Bibliographic record
Abstract
BACKGROUND: Intracerebral hemorrhage (ICH) is stroke caused by non-traumatic bleeding into the brain. AIM: This factsheet provides summary statistics for ICH from the 2021 Global of Burden of Diseases Study. METHODS: Data were downloaded from the GBD results platform using "intracerebral hemorrhage" as a Level 4 cause of death or injury, extracting key metrics (number, percent, rate) for measures (incidence, disabilty adjusted life years [DALYs], deaths) described in this factsheet. RESULTS: Globally, stroke was the third leading cause of death in 2021, and ICH accounted for 28.8% of incident strokes. There were estimated to be 7,252,678 deaths due to stroke in 2021 of which ICH accounted for 3,308,367 (45.6%). When considering the burden of ICH in terms of DALYs, ICH accounts for nearly half of the burden of stroke at 49.5%, compared to 43.8% caused by ischemic stroke. ICH must therefore be considered on an equal footing with ischemic stroke, so that efforts can be made to reduce its burden through public health, research, and healthcare provision. Although the overall age-standardized incidence of ICH has been decreasing since 1990, the rate of reduction has been much slower in regions with lower socio-demographic index (SDI). Most of the burden of ICH lies in areas with lower SDI, with 94.2% of DALYs lost to ICH outside areas of high SDI. Geographically, the majority of DALYs due to ICH occur in Southeast Asia, East Asia, and Oceania, with 53.3% of global DALYs lost in these regions alone. The risk factors for ICH are dominated by high systolic blood pressure, which accounts for at least 50% of the burden of ICH, regardless of SDI. Areas with middle or high-middle SDI have a greater proportion of the burden of ICH accounted for by ambient particulate pollution, smoking, and diets high in sodium, whereas household air pollution from solid fuels accounts for much more of the risk of ICH in low SDI regions. CONCLUSION: This World Stroke Organization (WSO) Global ICH Fact Sheet 2025 provides the most updated information on ICH that can be used to support communication with all internal and external stakeholders, inform healthcare policy, and raise public awareness. All statistics have been reviewed and approved for use by the WSO Executive Committee.
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How this classification was reachedexpand
Full frame machine prediction
Teacher imitationNot calibrated prevalence, not ground truth. Human validation pending. The Gemma side is a direct model label for every work in the frame, read from the title-only record. The Codex side is a classifier learned from the 10,348 direct Codex labels and calibrated to design-weighted sample rates; fields without enough sample support carry no Codex call. Candidate is the union of the two sides; consensus is their intersection. These outputs are machine_predicted_unvalidated and are not human labels.
Distilled classifier scores by category (both heads)
| Category | Codex | Gemma |
|---|---|---|
| Metaresearch | 0.004 | 0.016 |
| Meta-epidemiology (narrow) | 0.002 | 0.001 |
| Meta-epidemiology (broad) | 0.002 | 0.002 |
| Bibliometrics | 0.007 | 0.011 |
| Science and technology studies | 0.001 | 0.000 |
| Scholarly communication | 0.004 | 0.003 |
| Open science | 0.002 | 0.002 |
| Research integrity | 0.003 | 0.003 |
| Insufficient payload (model declined to judge) | 0.042 | 0.037 |
Machine scores (provisional)
The two teacher heads of the student model, read on this work. A score orders the frame for review; it never asserts a category, and the validation status ships verbatim with every row.
Baseline scores from an immature model (maturity gate not passed, 7 training rounds). Scores rank; they never assert a category.
score_only:v0-immature-baseline · verbatim from the scoring run: score_only means the number may rank works, and no category label ships from itClassification
machine, unvalidatedMachine predicted; a candidate call from one source (direct Gemma or distilled Codex), not a consensus.
How this classification was reached, model by model and score by score, is at the end of the page under "How this classification was reached".