Long-term mortality in cerebrovascular disease
Dawn M Bravata1, Shih-Yieh Ho, Lawrence M Brass
1Medical Service, Veterans Affairs Connecticut Healthcare System, West Haven, Conn, USA. Dawn.Bravata@yale.edu
Insights
Mortality after stroke, TIA, or carotid stenosis is significant, with over half of patients dying within five years. Predictors of early death include older age, male sex, and comorbidities.
Area of Science:
- Neurology
- Public Health
- Geriatrics
Background:
- Stroke is a leading cause of death in the US.
- Limited data exists on mortality patterns in cerebrovascular disease patients.
Purpose of the Study:
- Identify predictors of 6-month mortality.
- Evaluate 5-year mortality in patients with cerebrovascular disease.
Main Methods:
- Cohort study of Medicare beneficiaries aged 65+ discharged with acute ischemic stroke, TIA, or carotid stenosis in 1995.
- Follow-up through 2000 using Medicare claims and mortality data.
Main Results:
- 14.0% died within 6 months; 52.6% died within 5 years.
- Predictors of 6-month mortality: older age, male sex, comorbidity, non-home discharge, prior admission.
- Year 1 mortality: Carotid Stenosis 10.6%, TIA 14.8%, Ischemic Stroke 26.4%.
Conclusions:
- Substantial mortality exists after acute ischemic stroke, TIA, and carotid stenosis.
- Mortality rates and patterns vary by discharge diagnosis.
Background And Purpose:
Stroke is the third leading cause of death in the United States, yet data are limited about the temporal pattern of mortality among patients with cerebrovascular disease. The objectives of this study were to identify predictors of 6-month mortality and to evaluate 5-year mortality in patients with cerebrovascular disease.
Methods:
Our population included fee-for-service Medicare beneficiaries aged > or =65 years who were discharged with an acute ischemic stroke, transient ischemic attack (TIA), or carotid stenosis (International Classification of Diseases, Ninth Revision, Clinical Modification codes 433 to 436) from Connecticut acute care hospitals in 1995. This cohort was followed through 2000 by means of part A Medicare claims and Social Security Administration mortality data.
Results:
Among 5123 patients, 4781 survived their hospitalization and were followed for an average of 3.4 years; 670 (14.0%) died within 6 months of discharge, and 2517 (52.6%) died within 5 years. Predictors of 6-month mortality included older age, male sex, increasing comorbidity, discharge not to home, and prior admission within a year of the index hospitalization. The annual mortality rates for year 1 after discharge differed depending on the discharge diagnosis of the index hospitalization: carotid stenosis, 10.6%; TIA, 14.8%; and acute ischemic stroke, 26.4%. The 5-year cumulative mortality rates were as follows: carotid stenosis, 38.3%; TIA, 49.6%; and acute ischemic stroke, 60.0%.
Conclusions:
Mortality after acute ischemic stroke, TIA, and carotid stenosis is substantial. Rates and patterns of mortality differ according to patients' discharge diagnoses.
Related Concept Videos
Hemorrhagic Stroke ll: Pathophysiology
Dementia l: Introduction
Ischemic Stroke ll: Pathophysiology
Hemorrhagic Stroke l: Introduction
Ischemic Stroke l: Introduction
Cerebral Edema ll: Pathophysiology

