(a) Population-weighted 75th percentile ADI of deprivation index aggregated from census tract among kidney TRRs. (b) Population-weighted 75th percentile NDI of deprivation index aggregated from census tract among kidney TRRs. (c) Population-weighted 75th percentile SDI of deprivation index aggregated from census tract among kidney TRRs. (d) Population-weighted 75th percentile SVI 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; TRR, transplant referral region.