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Racial Disparities in Nephrology Consultation and Disease Progression among Veterans with CKD: An Observational
Jonathan Suarez1, Jordana B Cohen1,2, Vishnu Potluri1
1Renal-Electrolyte and Hypertension Division, Department of Medicine, and.
Insights
Racial disparities persist in chronic kidney disease (CKD) progression. Despite increased nephrology care access for Black and Hispanic veterans, they experience faster CKD progression, suggesting other factors influence outcomes.
Area of Science:
- Nephrology
- Health Disparities
- Chronic Kidney Disease (CKD) Research
Background:
- Incident rates of end-stage renal disease (ESRD) are disproportionately higher in Black and Hispanic populations compared to White patients.
- Access to nephrology care before ESRD development is linked to improved clinical outcomes for patients with CKD.
- It remains unclear if racial disparities in pre-ESRD nephrology consultation rates exist and if they contribute to worse outcomes among minority CKD patients.
Purpose of the Study:
- To investigate racial disparities in nephrology consultation rates among veterans with chronic kidney disease (CKD).
- To determine if these disparities contribute to differences in CKD progression and mortality.
- To examine the association between nephrology care access and clinical outcomes in diverse CKD patient populations.
Main Methods:
- A retrospective cohort study of Veterans Health Administration patients from 2003-2015.
- Analysis focused on patients with incident CKD stage 4 and CKD stage 3.
- Outcomes assessed included nephrology referral and visit rates, progression to CKD stage 5, and mortality.
Main Results:
- Black and Hispanic veterans with CKD demonstrated higher rates of nephrology referral and visits compared to non-Hispanic white veterans.
- Despite increased nephrology care, Black and Hispanic patients exhibited faster progression to CKD stage 5.
- Mortality rates showed a slight decrease in Black patients with CKD stage 4 but a small increase in Black patients with CKD stage 3.
Conclusions:
- Black and Hispanic veterans with CKD are more likely to receive nephrology care but still face more rapid disease progression.
- Factors beyond nephrology consultation, potentially biologic and environmental, may drive racial disparities in CKD progression.
- Further research is needed to understand and address the complex drivers of racial disparities in CKD outcomes.
Background:
Incident rates of ESRD are much higher among black and Hispanic patients than white patients. Access to nephrology care before progression to ESRD is associated with better clinical outcomes among patients with CKD. However, it is unknown whether black or Hispanic patients with CKD experience lower pre-ESRD nephrology consultation rates compared with their white counterparts, or whether such a disparity contributes to worse outcomes among minorities.
Methods:
We assembled a retrospective cohort of patients with CKD who received care through the Veterans Health Administration from 2003 to 2015, focusing on individuals with incident CKD stage 4 who had an initial eGFR≥60 ml/min per 1.73 m2 followed by two consecutive eGFRs<30 ml/min per 1.73 m2. We repeated analyses among individuals with incident CKD stage 3. Outcomes included nephrology provider referral, nephrology provider visit, progression to CKD stage 5, and mortality.
Results:
We identified 56,767 veterans with CKD stage 4 and 640,704 with CKD stage 3. In both cohorts, rates of nephrology referral and visits were significantly higher among black and Hispanic veterans than among non-Hispanic white veterans. Despite this, both black and Hispanic patients experienced faster progression to CKD stage 5 compared with white patients. Black patients with CKD stage 4 experienced slightly lower mortality than white patients, whereas black patients with CKD stage 3 had a small increased risk of death.
Conclusions:
Black or Hispanic veterans with CKD are more likely than white patients to see a nephrologist, yet are also more likely to suffer disease progression. Biologic and environmental factors may play a bigger role than nephrology consultation in driving racial disparities in CKD progression.
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