Journal article
Traditional Risk Factors as the Underlying Cause of Racial Disparities in Stroke Lessons From the Half-Full (Empty?) Glass
Stroke (1970), v 42(12), pp 3369-3375
01 Dec 2011
PMID: 21960581
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Abstract
Background and Purpose-Black/white disparities in stroke incidence are well documented, but few studies have assessed the contributions to the disparity. Here we assess the contribution of "traditional" risk factors.
Methods-A total of 25 714 black and white men and women, aged >= 45 years and stroke-free at baseline, were followed for an average of 4.4 years to detect stroke. Mediation analysis using proportional hazards analysis assessed the contribution of traditional risk factors to racial disparities.
Results-At age 45 years, incident stroke risk was 2.90 (95% CI: 1.72-4.89) times more likely in blacks than in whites and 1.66 (95% CI: 1.34-2.07) times at age 65 years. Adjustment for risk factors attenuated these excesses by 40% and 45%, respectively, resulting in relative risks of 2.14 (95% CI: 1.25-3.67) and 1.35 (95% CI: 1.08-1.71). Approximately one half of this mediation is attributable to systolic blood pressure. Further adjustment for socioeconomic factors resulted in total mediation of 47% and 53% to relative risks of 2.01 (95% CI: 1.16-3.47) and 1.30 (1.03-1.65), respectively.
Conclusions-Between ages 45 to 65 years, approximately half of the racial disparity in stroke risk is attributable to traditional risk factors (primarily systolic blood pressure) and socioeconomic factors, suggesting a critical need to understand the disparity in the development of these traditional risk factors. Because half of the excess stroke risk in blacks is not attributable to traditional risk factors and socioeconomic factors, differential impact of risk factors, residual confounding, or nontraditional risk factors may also play a role. (Stroke. 2011;42:3369-3375.)
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Details
- Title
- Traditional Risk Factors as the Underlying Cause of Racial Disparities in Stroke Lessons From the Half-Full (Empty?) Glass
- Creators
- George Howard - University of Alabama at BirminghamMary Cushman - University of VermontBrett M. Kissela - Univ Cincinnati, Dept Neurol, Cincinnati, OH USADawn O. Kleindorfer - Univ Cincinnati, Dept Neurol, Cincinnati, OH USALeslie A. McClure - University of AlabamaMonika M. Safford - Univ Alabama, Deep S Ctr Effectiveness, Birmingham Vet Affairs Med Ctr, Birmingham, AL USAJ. David Rhodes - Univ Alabama, Sch Publ Hlth, Dept Biostat, Birmingham, AL 35294 USAElsayed Z. Soliman - Wake Forest Univ, Sch Med, Dept Epidemiol & Prevent, Winston Salem, NC 27109 USAClaudia S. Moy - Natl Inst Neurol Disorders & Stroke, NIH, Bethesda, MD USASuzanne E. Judd - University of AlabamaVirginia J. Howard - Univ Alabama, Sch Publ Hlth, Dept Epidemiol, Birmingham, AL 35294 USAREGARDS Investigators
- Publication Details
- Stroke (1970), v 42(12), pp 3369-3375
- Publisher
- Lippincott Williams & Wilkins
- Number of pages
- 7
- Grant note
- NS 041588 / National Institute of Neurological Disorders and Stroke; United States Department of Health & Human Services; National Institutes of Health (NIH) - USA; NIH National Institute of Neurological Disorders & Stroke (NINDS) R01NS041588 / NATIONAL INSTITUTE OF NEUROLOGICAL DISORDERS AND STROKE; United States Department of Health & Human Services; National Institutes of Health (NIH) - USA; NIH National Institute of Neurological Disorders & Stroke (NINDS)
- Resource Type
- Journal article
- Language
- English
- Academic Unit
- Epidemiology and Biostatistics
- Web of Science ID
- WOS:000297941500017
- Scopus ID
- 2-s2.0-84856224392
- Other Identifier
- 991019231747304721
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- Collaboration types
- Domestic collaboration
- Web of Science research areas
- Clinical Neurology
- Peripheral Vascular Disease