Table 1.
Baseline characteristics of 1300 enrolled participants aged 3‐17 years in Vietnam
| Variable | Vitamin D | Placebo |
|---|---|---|
| N = 650 | N = 650 | |
| Mean years of age (SD) a | 8.6 (3.9) | 8.4 (4.0) |
| 3%‐6% | 242 (37.2%) | 245 (37.7%) |
| 7%‐9% | 171 (26.3%) | 146 (22.5%) |
| 10%‐12% | 107 (16.5%) | 127 (19.5%) |
| 13%‐17% | 130 (20.0%) | 132 (20.3%) |
| Sex (Female) | 325 (50.0%) | 354 (54.5%) |
| Mean baseline vitamin D level (SD)b | 65.73 (16.72) | 65.21 (16.89) |
| <25 | 3 (0.54%) | 3 (0.55%) |
| 25‐49 | 92 (16.64%) | 86 (15.87%) |
| 50‐74 | 300 (54.25%) | 296 (54.61%) |
| ≥75 | 158 (28.57%) | 157 (28.97%) |
a
Standard deviation.
b
Based on 553/650 (85.1%) samples from intervention group and 542/650 (83.4%) in the placebo group.