Table 3.
Serum concentration of calcium, phosphorus, parathyroid hormone and 1,25-dihydroxyvitamin D31
| Dietary calcium and phosphorus concentration | |||||
|---|---|---|---|---|---|
| Calcium (%) | 0.6 | 0.6 | 0.6 | 0.6 | 0.6 |
| Phosphorus (%) | 0.3 | 0.6 | 0.9 | 1.2 | 1.5 |
| Calcium (mg/dl) | 10.95 ± 0.56 | 10.38 ± 0.33 | 11.39 ± 0.69 | 10.95 ± 0.32 | 10.72 ± 0.41 |
| Phosphorus (mg/dl) | 7.52 ± 0.74 | 8.13 ± 0.32 | 7.83 ± 0.46 | 8.52 ± 0.85 | 9.39 ± 1.71 |
| PTH (pg/ml) | 7.82 ± 3.81 | 33.76 ± 11.43 | 32.53 ± 19.48 | 25.06 ± 10.35 | 75.12 ± 0.28***2 |
| 1,25(OH)2D3 (pg/ml) | 65.4 ± 4.7 | 102.6 ± 25.9 | 115.8 ± 12.4** | 124.9 ± 51.4 | 112.3 ± 19.0 |
1
Results are expressed as the mean ± SEM (n = 6) in each phosphorus diet group.
2
Significantly different from those of the 0.3% phosphorus diet group (*p<0.05; **p<0.01; ***p<0.001).
PTH, parathyroid hormone; 1,25(OH)2D3, 1,25-dihydroxyvitamin D3.