Abstract MP12: Educational Attainment and the Effect of Intensive Blood Pressure Reduction: A Post-Hoc Analysis of the Systolic Blood Pressure Intervention Trial (SPRINT)

Abstract

Introduction: Hypertension is a major risk factor for cardiovascular disease (CVD). The Systolic Blood Pressure Intervention Trial (SPRINT) demonstrated that systolic blood pressure (SBP) <120 mm Hg reduced CVD risk and all-cause mortality among those with elevated SBP and high CVD risk. Educational attainment (EA) is associated with CV health, but whether EA modifies the effect of intensive SBP reduction remains unclear. Hypothesis: We predicted that SPRINT participants with lower EA would have greater CVD risk reduction with intensive SBP lowering than those with higher EA. Methods: We included 9,361 individuals recruited as part of the SPRINT study and categorized them by EA (<college, some college through college graduate, and >college degree). We examined the effect of intensive SBP lowering across EA strata in relation to the composite endpoint defined by SPRINT (myocardial infarction, other acute coronary syndromes, stroke, heart failure, or CV death) in multivariable proportional hazards models. Results: The cohort was age 67.9±9.4 years, 35.6% female, and 57.8% White race. Those with high EA were more likely to be older, male, and White race. Higher EA was associated in a dose-response manner with a larger reduction in the risk of developing the composite endpoint after intensive SBP lowering [highest to lowest EA: adjusted HR 0.48 (95% CI: 0.34, 0.70); 0.81 (0.63, 1.03); 0.90 (0.70, 1.15); P , interaction=0.01] ( Table ). The interaction between intensive SBP lowering and EA was limited to non-Black individuals; among Black participants, the association of SBP lowering with the endpoint did not differ significantly by EA. Conclusion: In the SPRINT cohort, higher EA was associated with a larger improvement in CV outcomes after intensive SBP reduction, with differences by race or ethnicity. This post-hoc SPRINT analysis suggests that the benefit of intensive SBP lowering varies by EA, and highlights a need for tailored approaches to optimize hypertension management for individuals with different social backgrounds.