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Explaining the racial difference in AKI incidence.

Morgan E Grams1, Kunihiro Matsushita2, Yingying Sang2

  • 1Department of Medicine, Johns Hopkins University School of Medicine, Baltimore, Maryland; andDepartments of Epidemiology and mgrams2@jhmi.edu.

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Summary
This summary is machine-generated.

African Americans have a higher risk of acute kidney injury (AKI) compared to Caucasians. Socioeconomic factors, not genetics, appear to explain this disparity in AKI risk.

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Area of Science:

  • Nephrology
  • Public Health
  • Genetics

Background:

  • African Americans exhibit a disproportionately higher incidence of acute kidney injury (AKI) compared to Caucasian populations.
  • The underlying reasons for this disparity, including clinical, socioeconomic, and genetic factors, remain incompletely understood.

Purpose of the Study:

  • To investigate the contributing factors to the elevated risk of AKI among African Americans.
  • To determine the roles of clinical characteristics, socioeconomic status, and genetic variants in AKI disparities.

Main Methods:

  • Analysis of 10,588 participants from the Atherosclerosis Risk in Communities (ARIC) study, a prospective cohort.
  • Follow-up for hospitalization for AKI, end-stage renal disease (ESRD), or death until December 31, 2010.
  • Statistical adjustment for demographics, cardiovascular risk factors, kidney markers, socioeconomic variables, and APOL1 genetic variants.

Main Results:

  • The unadjusted incidence of hospitalized AKI was higher in African Americans (7.4 per 1000 person-years) than Caucasians (5.8 per 1000 person-years).
  • Elevated AKI risk in African Americans persisted after adjusting for clinical and demographic factors (aHR, 1.20; 95% CI, 1.01-1.43).
  • Accounting for income and insurance disparities attenuated the association between race and AKI risk, while high-risk APOL1 variants showed no significant association with AKI in African Americans.

Conclusions:

  • The higher risk of acute kidney injury among African Americans is significantly associated with socioeconomic disparities.
  • Genetic factors, specifically high-risk APOL1 variants, do not appear to explain the increased AKI risk in this population.
  • Addressing socioeconomic determinants of health is crucial for mitigating racial disparities in AKI incidence.