Racial disparities in stroke risk factors: The impact of socioeconomic status

Dawn M. Bravata, Carolyn K. Wells, Barbara Gulanski, Walter N. Kernan, Lawrence M. Brass, Judith Long, John Concato

Research output: Contribution to journalArticle

85 Scopus citations

Abstract

Background and Purpose - In the US, blacks have a higher incidence of stroke and more severe strokes than whites. Our objective was to determine if differences in income, education, and insurance, as well as differences in the prevalence of stroke risk factors, accounted for the association between ethnicity and stroke. Methods - We used data from the Third National Health and Nutrition Survey (NHANES III), a cross-sectional sample of the noninstitutionalized US population (1988-1994), and included blacks and whites aged 40 years or older with a self-reported stroke history. Income was assessed using a ratio of income to US Census Bureau annual poverty threshold. Results - Among 11 163 participants, 2752 (25%) were black and 619 (6%) had a stroke history (blacks: 160/2752 [6%]; whites: 459/8411 [6%]; P=0.48). Blacks had a higher prevalence of 5 risk factors independently associated with stroke: hypertension, treated diabetes, claudication, higher C-reactive protein, and inactivity; whites had a higher prevalence of 3 risk factors: older age, myocardial infarction, and lower high-density lipoprotein cholesterol. Ethnicity was independently associated with stroke after adjusting for the 8 risk factors (adjusted odds ratio, 1.32; 95% CI, 1.04 to 1.67). Ethnicity was not independently associated with stroke after adjustment for income and income was independently associated with stroke (adjusted odds ratios for: ethnicity, 1.15; 95% CI, 0.88 to 1.49; income, 0.89; 95% CI, 0.82 to 0.95). Adjustment for neither education nor insurance altered the ethnicity-stroke association. Conclusions - In this study of community-dwelling stroke survivors, ethnic differences exist in the prevalence of stroke risk factors and income may explain the association between ethnicity and stroke.

Original languageEnglish (US)
Pages (from-to)1507-1511
Number of pages5
JournalStroke
Volume36
Issue number7
DOIs
StatePublished - Jul 1 2005
Externally publishedYes

Keywords

  • Ischemia
  • Risk factors
  • Social class

ASJC Scopus subject areas

  • Clinical Neurology
  • Cardiology and Cardiovascular Medicine
  • Advanced and Specialized Nursing

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  • Cite this

    Bravata, D. M., Wells, C. K., Gulanski, B., Kernan, W. N., Brass, L. M., Long, J., & Concato, J. (2005). Racial disparities in stroke risk factors: The impact of socioeconomic status. Stroke, 36(7), 1507-1511. https://doi.org/10.1161/01.STR.0000170991.63594.b6