(a) Population-weighted ADI median of deprivation index aggregated from census tract among kidney TRRs. (b) Population-weighted NDI median of deprivation index aggregated from census tract among kidney TRRs. (c) Population-weighted SDI median of deprivation index aggregated from census tract among kidney TRRs. (d) Population-weighted SVI median of deprivation index aggregated from census tract among kidney TRRs. ADI, area deprivation index; NDI, deprivation index; SDI, social deprivation index; SVI, social vulnerability index; TRR, transplant referral region.