Table 2. Clinical and biochemical characteristics according to the BMI status (mean±s.d.).
| Items | Normal weight (n=355) | Overweight (n=69) | Obesity (n=68) | Severe obesity (n=54) | P-value |
|---|---|---|---|---|---|
| Age (years) | 9.65+3.34 | 10.43+2.6 | 11.09+2.4 | 11.11+3.28 | 0.001 |
| BMI (Z-score) | −0.19±0.67 | 1.37+0.29 | 2.46+0.28 | 4.65+2.24 | 0.001 |
| Calcium (mg dl−1) | 9.98+0.35 | 10.01+0.37 | 10.05+0.35 | 9.96+0.36 | 0.610 |
| Phosphorus (mg dl−1) | 4.58+0.57 | 4.62+0.55 | 4.65+0.62 | 4.53+0.71 | 0.842 |
| ALP (IU l−1) | 234.92+81.36 | 243.86+82.41 | 253.21+91.16 | 220.26+99.71 | 0.253 |
| PTH (pg ml−1) | 31.09+15.94 | 33.12+16.25 | 39.89+20.56 | 45.22+21.99 | 0.001 |
| Calcidiol (ng ml−1) | 28.09+7.68 | 27.65+7.34 | 26.18+7.00 | 23.09+8.24 | 0.001 |
Abbreviations: ALP, alkaline phosphatase; BMI, body mass index; PTH, parathyroid hormone.