TABLE 4.
Associations of baseline 25(OH)D and change in parathyroid hormone by race/ethnicity among participants assigned to vitamin D31
| Parathyroid hormone, pg/mL | |||||
|---|---|---|---|---|---|
| Baseline 25(OH)D (ng/mL) | n | Baseline, mean (SD) | After treatment, mean (SD) | Change from baseline, mean (95% CI) | Difference in change,2 mean (95% CI) |
| White | |||||
| <20 | 17 | 85 (42) | 63 (24) | –22 (–41, -3) | –22 (–30, –13) |
| ≥20 | 141 | 45 (31) | 45 (30) | 0 (–3, 2) | Ref |
| Black | |||||
| <20 | 42 | 63 (32) | 53 (26) | –10 (–15, –5) | –8 (–13, –3) |
| ≥20 | 117 | 51 (26) | 49 (26) | –2 (–5, 0) | Ref |
| Hispanic | |||||
| <20 | 12 | 59 (19) | 57 (16) | –2 (–9, 5) | –1 (–10, 8) |
| ≥20 | 64 | 46 (21) | 45 (26) | –1 (–4, 3) | Ref |
| Chinese | |||||
| <20 | 8 | 44 (14) | 38 (14) | –7 (–15, 2) | –5 (–13, 3) |
| ≥20 | 52 | 36 (18) | 34 (16) | –2 (–5, 1) | Ref |
1
Ref, reference; 25(OH)D, 25-hydroxyvitamin D.
2
Differences compare participants with baseline 25(OH)D <20 ng/mL with those with 25(OH)D ≥20 ng/mL [P = 0.134 for 25(OH)D category–race interaction].