Race/Ethnicity, Income, Major Risk Factors, and Cardiovascular Disease Mortality
Avis J. Thomas, MS,
Lynn E. Eberly, PhD,
George Davey Smith, MD, DSc,
James D. Neaton, PhD,
Jeremiah Stamler, MD for the Multiple Risk Factor Intervention Trial Research Group
Avis J. Thomas, Lynn E. Eberly, and James D. Neaton are with the Coordinating Centers for Biometric Research, Division of Biostatistics, School of Public Health, University of Minnesota, Minneapolis. George Davey Smith is with the Department of Social Medicine, University of Bristol, Bristol, England. Jeremiah Stamler is with the Department of Preventive Medicine, Feinberg School of Medicine, Northwestern University, Chicago, Ill.
Correspondence: Requests for reprints should be sent to Avis J. Thomas, MS, Coordinating Centers for Biometric Research, University of Minnesota, 2221 University Ave SE, Suite 200, Minneapolis, MN 55414 (e-mail: avist{at}ccbr.umn.edu).
Objectives. We explored differences between Black and Whitemen for cardiovascular disease (CVD) mortality across majorrisk factor levels.
Methods. Major CVD risk factors were measured among 300 647White and 20 223 Black men aged 35 to 57 years who were screenedfor the Multiple Risk Factor Intervention Trial (MRFIT). Hazardratios for CVD deaths for Black and White men over 25 yearsof follow-up were calculated for subgroups stratified accordingto risk factor levels.
Results. CVD was responsible for 2518 deaths among Black menand 30772 deaths among White men. The age-adjusted Black-to-WhiteCVD hazard ratio was 1.35 (95% confidence interval [CI]=1.29,1.40); the risk- and income-adjusted ratio was 1.05 (95% CI=1.01,1.10). CVD mortality rates were dramatically lower in casesof favorable risk profiles. However, fully adjusted Black-to-WhiteCVD hazard ratios within groups at low, intermediate, high,and very high levels of overall risk were 1.76, 1.20, 1.10,and 0.94, respectively. Similar gradients were evident for individualrisk factors.
Conclusions. Higher CVD mortality rates among Black men werelargely mediated by risk factors and income. These data underscorethe need for sustained primordial risk factor prevention amongBlack men.
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