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Determinants of long-term mortality after stroke
Insights
This study identified key risk factors for death in 409 cerebrovascular disease patients. Impaired consciousness, advanced age, and specific conditions like intracerebral hemorrhage significantly increased mortality risk.
Area of Science:
- Neurology
- Public Health
- Epidemiology
Background:
- Cerebrovascular diseases represent a significant cause of mortality and morbidity worldwide.
- Understanding risk factors for death in stroke patients is crucial for effective management and prevention strategies.
- This study focuses on a well-defined population excluding subarachnoid hemorrhage to isolate specific risk factors.
Purpose of the Study:
- To identify and quantify the risk factors associated with mortality in patients admitted to a Stroke Unit with cerebrovascular disease.
- To estimate survival rates at different time points post-admission.
- To inform clinical practice and public health interventions for stroke patient outcomes.
Main Methods:
- Life table technique for survival analysis.
- Log rank test for comparing survival curves.
- Multivariate analysis using Cox's proportional hazard model (BMDP program).
- Study population: 409 patients with well-defined cerebrovascular disease (excluding subarachnoid hemorrhage).
Main Results:
- Estimated survival proportions: 77% at 3 months, 69% at 1 year, and 32% at 5 years.
- Intracerebral hemorrhage and embolic cerebral infarction were associated with the worst outcomes.
- Most significant risk factors for death: impaired consciousness on admission, followed by high age, prior cardiac failure, diabetes mellitus, and male sex.
Conclusions:
- Impaired consciousness, advanced age, cardiac failure, diabetes, and male sex are critical predictors of mortality in stroke patients.
- Specific stroke types like intracerebral hemorrhage and embolic infarction carry a poorer prognosis.
- These findings highlight the need for targeted interventions for high-risk individuals to improve stroke survival rates.
Abstract:
Risk factors of death for a population of 409 patients with well-defined cerebrovascular disease (patients with subarachnoidal hemorrhage excluded) admitted to the Stroke Unit were studied with the aid of the life table technique, log rank test, and multivariate analysis with BMDP's program for regression on the survival curves with Cox's proportional hazard model. The estimated proportion of survivors was 77% after three months, 69% after one year, and 32% after five years. Patients with intracerebral hemorrhage and embolic cerebral infarction had the worst outcome. Impaired consciousness on admission was the most important risk factor of death followed by high age, previous cardiac failure, diabetes mellitus and male sex.