Descriptive data of studied subjects
| Cases (n=50) | Controls (n=50) | t | P | |
| Age (years) | 7.81±2.6 (3.6–10) | 7.76±2.47 (3–10) | 1.56 | 0.32 |
| Sun exposure (hours/week) | 3.5±1 (1.5–5.5) | 4.10±0.5 (2–6.5) | 1.2 | 0.96 |
| Height SDS | −3.12±0.21 (−2.24 to −6.87) | +1.11±0.55 (−1.32 to +1.59) | 12.51 | <0.001*** |
| BMI SDS | +1.22±0.64 (−0.86 to +1.72) | +0.99±0.55 (−0.5 to +1.34) | 0.55 | 0.09 |
| BA SDS | −3.11±0.65 (−2.51 to −6.89) | −0.86±0.11 (−1.10 to +1.88) | 15.66 | <0.001*** |
| Total serum Ca (mg/dL) | 8.3±0.9 (6.9–9.9) | 9.9±0.4 (8.9–10.8) | 6.43 | 0.04* |
| Total serum P (mg/dL) | 4.9±0.3 (3.7–6.2) | 5.1±0.2 (3.9–5.5) | 1.54 | 0.09 |
| ALP (IU/L) | 221.8±135.2 (119–480) | 218±100.5 (115.7–312) | 2.39 | 0.87 |
| PTH (pg/mL) | 40.8±15.1 (18.5–85.4) | 28.5±10.1 (16.89–57.1) | 7.41 | 0.031* |
| 25(OH)D (ng/mL) | 18.4±5.4 (5.9–53.2) | 53.9±10.1 (34.1–78.5) | 14.56 | <0.001*** |
Results are expressed as mean±SD and range.
*P<0.05, ***P<0.001.
25(OH)D, 25 hydroxyvitamin D; ALP, alkaline phosphatase; BA, bone age; BMI, body mass index; Ca, calcium; P, phosphorous; PTH, parathyroid hormone; SDS, SD score.