Reconsidering Donor Race in Predicting Allograft and Patient Survival Among Kidney Transplant Recipients

Area of Science:

• Nephrology
• Transplantation immunology
• Medical ethics

Background:

• Donor race is a factor in current kidney donor risk assessment models.
• The use of donor race in predicting transplant outcomes is ethically and scientifically questionable.
• Current models may contribute to kidney allograft discard.

Purpose of the Study:

• To evaluate the impact of removing donor race from kidney transplant prediction models.
• To determine if excluding donor race can reduce kidney allograft discard rates.
• To advocate for the use of biologic factors over social constructs in predictive modeling.

Main Methods:

• Analysis of kidney donor data, excluding the variable of donor race.
• Reclassification of kidneys previously categorized as high-risk based on donor race.
• Simulation of revised Kidney Donor Risk Index (KDRI) scores.

Main Results:

• Removing donor race from predictive models may reclassify up to 50% of kidneys currently deemed high-risk.
• Exclusion of donor race is unlikely to negatively impact patient or allograft survival predictions.
• Potential for increased utilization of deceased donor kidneys.

Conclusions:

• Donor race is not a valid predictor of kidney allograft or patient survival and should be removed from risk models.
• Eliminating donor race from the Kidney Donor Risk Index could significantly reduce kidney discard.
• Future kidney transplant prediction models must prioritize relevant biological determinants over social constructs.