Table 3.

Adjusted relative incidence of LKD by zip code quintile of median household income in African-American and white populationsa

Income QuintileAfrican-American PopulationWhite Population
Q1 (<$30,962)1.001.00
Q2 ($30,962–$37,314)1.09 (1.02 to 1.17)1.05 (1.01 to 1.07)
Q3 ($37,315–$44,723)1.26 (1.17 to 1.35)1.11 (1.07 to 1.15)
Q4 ($44,724–$56,580)1.53 (1.41 to 1.65)1.15 (1.11 to 1.20)
Q5 (>$56,580)1.79 (1.63 to 1.95)1.19 (1.13 to 1.24)
  • 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.