The study looked at 162,587 first-time live-donor kidney transplantation candidates in the national transplant registry from January 1995 through December 2021. Participants were tracked for an average of 1.9 years. Among those patients, 49.2 percent were Black and 50.8 percent were White. The researchers matched the Zip codes of the candidates to Census Bureau data reflecting the racial diversity (or lack thereof) of their neighborhoods.