Table 4.

Adjusted relative incidence of LKD in African-American populations compared with white populations, stratified by zip code quintile of median household incomea

Income QuintileIRR for Living Donation in African Americans versus Whites
Total population1.20 (1.17 to 1.24)
Q1 (<$30,962)0.84 (0.78 to 0.90)
Q2 ($30,962–$37,314)1.01 (0.94 to 1.09)
Q3 ($37,315–$44,723)1.31 (1.22 to 1.41)
Q4 ($44,724–$56,580)1.50 (1.39 to 1.62)
Q5 (>$56,580)1.87 (1.73 to 2.02)
  • Data are presented as the IRR (95% CI). Multilevel Poisson regression model adjusted for donor age and sex, population age and sex, ESRD rate standardized for age and sex, and geography (RUCA and state of residence).

  • a P<0.001 for interaction of race and income in the combined model.