Table 1.
Characteristic | Median Household Income Quintiles | P Value | ||||
---|---|---|---|---|---|---|
Q1 (<$30,962) | Q2 ($30,962–$37,314) | Q3 ($37,315–$44,723) | Q4 ($44,724–$56,580) | Q5 (>$56,580) | ||
African-American population | ||||||
Population (n) | 14 million | 8 million | 6 million | 4 million | 3 million | |
Age (yr) | 34±14 | 33±11 | 32±11 | 31±10 | 31±10 | <0.001 |
Age categories (yr) | <0.001 | |||||
18–39 | 47 | 51 | 52 | 52 | 48 | |
40–59 | 34 | 33 | 33 | 34 | 40 | |
≥60 | 19 | 16 | 15 | 14 | 12 | |
Female sex | 52 | 51 | 52 | 52 | 51 | 0.42 |
Age and sex standardized ESRD rate (pmp) | 762 | 653 | 594 | 540 | 502 | <0.001 |
Residence | ||||||
Metropolitan | 84 | 86 | 94 | 98 | 99 | <0.001 |
Micropolitan | 7 | 8 | 5 | 1 | 1 | <0.001 |
Rural residence | 9 | 6 | 1 | 1 | 0 | <0.001 |
White population | ||||||
Population (n) | 28 million | 39 million | 41 million | 44 million | 46 million | <0.001 |
Age (yr) | 49±4 | 48±4 | 48±3 | 47±3 | 46±4 | <0.001 |
Age categories (yr) | <0.001 | |||||
18–39 | 40 | 38 | 39 | 39 | 37 | |
40–59 | 32 | 34 | 35 | 37 | 42 | |
≥60 | 28 | 28 | 26 | 24 | 21 | |
Female sex | 52 | 52 | 52 | 52 | 52 | 0.41 |
Age and sex standardized ESRD rate (pmp) | 358 | 319 | 294 | 262 | 215 | <0.001 |
Residence | ||||||
Metropolitan | 49 | 54 | 73 | 91 | 99 | <0.001 |
Micropolitan | 20 | 23 | 16 | 5 | 1 | <0.001 |
Rural | 31 | 23 | 11 | 4 | 0 | <0.001 |
Data are presented as mean ± SD or percentages, unless otherwise stated. Where not stated, missing values comprised <5% of all values.