Table 2.
Distribution of markers of mineral metabolism across race in patients with CKD not requiring chronic dialysis and ESRD
| Marker | Non-Hispanic White | Non-Hispanic Black | P Value |
|---|---|---|---|
| CKD not requiring chronic dialysis | (n=622) | (n=290) | |
| serum calcium (mg/dl) | 8.9±0.7 | 9.0±0.7 | 0.02 |
| serum phosphate (mg/dl) | 4.3±1.2 | 4.4±1.7 | 0.09 |
| 25-hydroxyvitamin D (ng/ml) | 21 (15–28) | 14 (9–19) | <0.001 |
| 1,25-dihydroxyvitamin D (pg/ml) | 17 (12–26) | 18 (12–25) | 0.67 |
| intact parathyroid hormone (pg/ml) | 129 (77–216) | 187 (108–328) | <0.001 |
| fibroblast growth factor-23 (RU/ml) | 431 (232–1026) | 323 (181–655) | <0.001 |
| estimated GFR (ml/min per 1.73 m2) | 18±6 | 19±7 | 0.06 |
| ESRD | (n=251) | (n=334) | |
| serum calcium (mg/dl) | 9.3±1.0 | 9.1±0.9 | 0.001 |
| serum phosphate (mg/dl) | 5.6±1.8 | 5.5±1.8 | 0.53 |
| 25-hydroxyvitamin D (ng/ml) | 17 (12–24) | 13 (9–19) | <0.001 |
| 1,25-dihydroxyvitamin D (pg/ml) | 12 (8–16) | 12 (8–18) | 0.73 |
| intact parathyroid hormone (pg/ml) | 136 (87–317) | 225 (135–430) | <0.001 |
| fibroblast growth factor-23 (RU/ml) | 4036 (1393–12,878) | 3914 (1350–13,682) | 0.73 |
| time on dialysis (d) | 712±1018 | 950±1343 | 0.02 |
Data expressed as mean ± SD or median (interquartile range).