| Aetiology . | Serum levels . | |
|---|---|---|
| 25-hydroxyvitamin D . | 1,25-dihydroxyvitamin D . | |
Vitamin D deficiency | Low | Low to elevated |
25-hydroxyvitamin D, 1α-hydroxylase deficiency | Normal to elevated | Very low |
Resistance to 1,25-dihydroxyvitamin D | Normal to elevated | Markedly elevated |
| Aetiology . | Serum levels . | |
|---|---|---|
| 25-hydroxyvitamin D . | 1,25-dihydroxyvitamin D . | |
Vitamin D deficiency | Low | Low to elevated |
25-hydroxyvitamin D, 1α-hydroxylase deficiency | Normal to elevated | Very low |
Resistance to 1,25-dihydroxyvitamin D | Normal to elevated | Markedly elevated |
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