Quality of life and outcomes in African Americans with CKD

Anna Porter1, Michael J Fischer2, Xuelei Wang3

  • 1Department of Medicine, University of Illinois Hospital and Health Sciences System and Jesse Brown Veterans Affairs Medical Center, Chicago, Illinois; aporte3@uic.edu.

Insights

Low health-related quality of life (HRQOL) is linked to worse outcomes in patients with hypertensive chronic kidney disease (CKD). Lower physical and mental health scores predict increased cardiovascular events and kidney disease progression.

Area of Science:

  • Nephrology
  • Public Health
  • Cardiovascular Medicine

Background:

  • Low health-related quality of life (HRQOL) is a known risk factor for adverse outcomes in end-stage renal disease (ESRD).
  • The association between HRQOL and outcomes in predialysis chronic kidney disease (CKD) remains less understood.
  • Hypertensive CKD disproportionately affects African Americans, highlighting the need for research in this population.

Purpose of the Study:

  • To evaluate the association between HRQOL and renal and cardiovascular (CV) outcomes in African Americans with hypertensive CKD.
  • To investigate the impact of both physical and mental health composite scores on disease progression and mortality.
  • To analyze these associations using various measurement approaches (baseline, time-varying, cumulative).

Main Methods:

  • Utilized data from 1091 African Americans in the African American Study of Kidney Disease and Hypertension (AASK) trial and cohort studies.
  • Assessed HRQOL using the Short Form-36 survey, focusing on mental health composite (MHC) and physical health composite (PHC) scores.
  • Employed Cox regression analyses to examine the relationship between decrements in MHC and PHC scores and outcomes like CKD progression, CV events, and all-cause mortality.

Main Results:

  • Lower mean PHC scores were consistently associated with increased risk of CV events/CV death and CKD progression/death.
  • Lower mean MHC scores were associated with an elevated risk of CV events/CV death across all analytical methods.
  • Time-varying and cumulative decrements in both PHC and MHC scores were significantly linked to CKD progression and the composite outcome of CKD progression or death.

Conclusions:

  • Diminished HRQOL, encompassing both physical and mental health, is significantly associated with adverse renal and cardiovascular outcomes in African Americans with hypertensive CKD.
  • These findings underscore the importance of assessing and addressing HRQOL in managing patients with hypertensive CKD.
  • Interventions aimed at improving HRQOL may play a crucial role in mitigating adverse outcomes in this high-risk population.

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