Table 1.
Anthropometric and biochemical characteristics of study subjects.
| Parameters | All | Girls | Boys | p-Value |
|---|---|---|---|---|
| N | 2938 | 1697 | 1241 | |
| Age (years) | 14.9 ± 1.7 | 14.8 ± 1.8 | 15.1 ± 1.6 | <0.001 |
| Height (cm) | 158.9 ± 10.3 | 156.4 ± 9.5 | 162.6 ± 10.3 | <0.001 |
| Weight (kg) | 60.4 ± 16.8 | 57.6 ± 15.2 | 65.8 ± 33.6 | <0.001 |
| BMI (kg/m2) | 23.8 ± 5.7 | 23.5 ± 5.7 | 24.2 ± 5.7 | 0.004 |
| BMI Z-score | 0.6 ± 1.2 | 0.6 ± 1.2 | 0.7 ± 1.2 | 0.06 |
| Ca (mmol/L) | 2.5 ± 0.4 | 2.5 ± 0.4 | 2.6 ± 0.4 | <0.001 |
| Pi (mmol/L) | 1.5 ± 0.4 | 1.4 ± 0.3 | 1.6 ± 0.5 | <0.001 |
| ALP (U/L) | 63.6 (42.5–94) | 58.2 (39.5–88.9) | 70.6 (48.0–100.6) | <0.001 |
| 25(OH)D (nmol/L) | 30.8 (22.5–42.2) | 26.9 (20.5–38.4) | 35.8 (28.1–46.4) | <0.001 |
Note: Data are presented as mean ± standard deviation and median (IQR) for gaussian and non-gaussian continuous variables. The difference between the sexes is significant for p < 0.05. ALP, alkaline phosphatase; BMI, body mass index; Ca, calcium; Pi, inorganic phosphorous; 25(OH)D, 25(hydroxy) vitamin D.