Table 1. Baseline comparisons between Blacks and Whites.
| Variable | Black | White | p-value | ||||
|---|---|---|---|---|---|---|---|
| N | Mean (sd) | Median (q1-q3) | N | Mean (sd) | Median (q1-q3) | ||
| Age (years) | 561 | 64 (8) | 64 (58 – 69) | 481 | 59 (8) | 57 (53 – 64) | < 0.0001 |
| BMI (kg/M2) | 552 | 30 (5) | 29 (26 – 33) | 481 | 26 (4) | 25 (23 – 28) | < 0.0001 |
| Weight (kg) | 560 | 79 (14) | 77 (68 – 86) | 481 | 68 (10) | 66 (60 – 74) | < 0.0001 |
| Dietary Ca intake (mg) | 543 | 790 (483) | 686 (458 – 1,008) | 466 | 779 (379) | 730 (519 – 984) | 0.370 |
| 25(OH)D (nmol/L) | 554 | 46 (17) | 46 (33 – 59) | 456 | 69 (26) | 67 (51 – 83) | < 0.0001 |
| 1, 25(OH)2D (pmol/L) | 290 | 109 (38) | 102 (79 – 135) | 426 | 90 (33) | 85 (67 – 108) | < 0.0001 |
| Fasting urine Ca/Cr | 352 | 0.07 (0.05) | 0.05 (0.03 – 0.09) | 463 | 0.11 (0.06) | 0.09 (0.06 – 0.14) | < 0.0001 |
| 24-hour urine Ca/Cr×1,000 | 285 | 80 (46) | 72 (44 – 108) | 235 | 138 (70) | 126 (89 – 179) | < 0.0001 |
| 24-hour urine Ca (mg) | 287 | 80 (50) | 71 (43 – 111) | 240 | 98 (56) | 91 (54 – 132) | < 0.001 |
| 24-hour urine Cr (mg) | 286 | 1,033 (376) | 997 (790 – 1,235) | 237 | 754 (271) | 769 (561 – 939) | < 0.0001 |
| PTH (pg/mL) | 557 | 50 (24) | 46 (34 – 62) | 470 | 36 (15.3) | 33 (25 – 44) | < 0.0001 |
| Serum Ca (mg/dL) | 553 | 9.3 (0.53) | 9.3 (9 – 9.6) | 475 | 9.6 (0.4) | 9.6 (9.3 – 9.8) | < 0.0001 |
| Serum Cr (mg/dL) | 557 | 0.84 (0.19) | 0.80 (0.7 – 1.0) | 477 | 0.77 (0.2) | 0.8 (0.6 – 0.9) | < 0.0001 |
| eGFR(mL/min/1.73m2) | 557 | 87 (18) | 87 (73 – 103) | 477 | 84 (18) | 84 (69 – 101) | 0.006 |
*p-values are from Wilcoxon rank-sum test.