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Published on: August 18, 2015
Ethnic differences in stroke recurrence
Lynda D Lisabeth1, Melinda A Smith, Devin L Brown
1Department of Epidemiology, University of Michigan School of Public Health, 109 South Observatory, Ann Arbor, MI 48109-2029, USA. llisabet@umich.edu
Insights
Mexican Americans (MAs) face a higher risk of stroke recurrence compared to non-Hispanic white individuals. Stroke recurrence significantly impacts mortality across all ethnic groups, highlighting the need for targeted interventions.
Area of Science:
- Neurology
- Epidemiology
- Public Health
Background:
- Stroke recurrence is a significant concern, impacting patient outcomes and healthcare costs.
- Ethnic disparities in stroke incidence and outcomes are well-documented, but recurrence patterns require further investigation.
Purpose of the Study:
- To investigate ethnic differences in the risk of stroke recurrence.
- To determine if the impact of stroke recurrence on mortality varies by ethnicity.
Main Methods:
- Prospective cohort study using data from the Brain Attack Surveillance in Corpus Christi project (2000-2004).
- Identification of first-ever ischemic strokes, recurrent strokes, and deaths.
- Estimation of cumulative stroke recurrence probability and use of Cox proportional hazards models to analyze ethnic differences and mortality associations.
Main Results:
- Mexican Americans (MAs) exhibited a higher risk of stroke recurrence (risk ratio, 1.57) compared to non-Hispanic white patients, even after adjusting for covariates.
- The cumulative risk of recurrence at 1 year was 7.5%.
- Stroke recurrence was associated with increased mortality similarly across ethnic groups.
Conclusions:
- MAs have an elevated risk for stroke recurrence, necessitating focused preventive strategies.
- Stroke recurrence poses a substantial mortality risk, emphasizing the importance of secondary prevention efforts.
- Targeted interventions are crucial to mitigate stroke recurrence in the Mexican American population.
Objective:
To determine whether stroke recurrence and the effect of recurrence on mortality differ by ethnicity.
Methods:
Using methods from the Brain Attack Surveillance in Corpus Christi project, we prospectively identified first-ever ischemic strokes from emergency department logs and hospital admissions (January 2000 to December 2004). Recurrent strokes and deaths were identified for the same period. Cumulative probability of stroke recurrence was estimated. Cox proportional hazards models were used to examine ethnic differences in recurrence and to examine the relation among ethnicity, recurrence, and mortality.
Results:
During the time interval, 1,345 first-ever ischemic strokes were validated. Median age of patients was 72 years; 53% were Mexican American (MA). There were 126 recurrent strokes. Cumulative risk for recurrence at 30 days and 1 year was 2.6 and 7.5%, respectively. MAs had higher risk for stroke recurrence (risk ratio, 1.57; 95% confidence interval, 1.05-2.34) compared with non-Hispanic white patients, adjusted for demographics, stroke risk factors, and stroke severity. Stroke recurrence was related to mortality to a similar extent across ethnic groups (non-Hispanic white patients: risk ratio, 3.32; 95% confidence interval, 2.07-5.32; MAs: risk ratio, 2.35; 95% confidence interval, 1.42-3.88).
Interpretation:
MAs had higher stroke recurrence risk compared with non-Hispanic white patients. Stroke recurrence had an important impact on mortality. Efforts to reduce stroke recurrence in MAs are needed.
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