TABLE 2.
Concentrations of serum 25(OH)D before and after the intervention1
| Treatment arm |
||
| Vitamin D | Placebo | |
| Baseline | ||
| No. of subjects | 60 | 59 |
| Concentration (ng/mL) | 7.0 ± 3.62 | 7.3 ± 3.9 |
| Proportion <20 ng/mL | 100 | 100 |
| 3 mo | ||
| No. of subjects | 61 | 59 |
| Concentration (ng/mL) | 18.2 ± 6.73 | 4.1 ± 0.7 |
| Proportion <20 ng/mL | 67 | 100 |
| 6 mo | ||
| No. of subjects | 57 | 55 |
| Concentration (ng/mL) | 19.8 ± 5.03 | 9.6 ± 4.0 |
| Proportion <20 ng/mL | 60 | 98 |
1
25(OH)D, 25-hydroxyvitamin D.
2
Mean ± SD (all such values).
3
Significantly different from placebo, P < 0.0001 (Student's t test).