Characteristic | Case 1 | Case 2 | Case 3 | Reference Range |
---|---|---|---|---|

Anthropometric data | ||||

Weight, kg | 6.7 | 15.3 | 24.4 | |

Height, cm | 62.8 | 93.5 | 115 | |

Weight for height, Z score | 0.32 | 0.82 | 1.98 | |

Weight for age, Z score | −3.5 | −3.1 | 0.42 | |

Height for age, Z score | −5 | −6 | −1.3 | |

Serum* | ||||

Calcium, mg/dL | 9.6–10.6 | |||

Pretreatment | 8.9 | 6.9 | 6.8 | |

Posttreatment | 9.0 | 9.6 | ||

Corrected calcium, mg/dL† | 8.5 | 5.7 | 7.4 | 9.6–10.6 |

Phosphorus, mg/dL | 2.0 | 3.9 | 3.0 | 4.3–5.4 |

Alkaline phosphatase, U/L | <400 | |||

Pretreatment | 707 | 3491 | 987 | |

Posttreatment | 333 | |||

Albumin, g/dL | 4.3 | 5.0 | 3.6 | 3.5–5.0 |

25-Hydroxyvitamin D, ng/mL | 8–38 | |||

Pretreatment | <4.5 | <4.5 | ||

Posttreatment | 60 | 10 | ||

1,25-Dihydroxyvitamin D, pg/mL | 22–67 | |||

Pretreatment | 57 | 102 | 110 | |

Posttreatment | 200 | 139 | ||

Parathyroid hormone, pg/mL | 1.0–5.2 | |||

Pretreatment | 63 | 39 | 173 | |

Posttreatment | 4.2 | 22 | 31 | |

Urinary calcium excretion, mg/d | 0.52 | 12.5 | 25–300 | |

Fractional absorption of calcium, %‡ | 76 | 15–60 |

↵* To convert values for calcium to millimoles per liter, multiply by 0.25; to convert values for phosphorus to millimoles per liter, multiply by 0.32; to convert values for 25-hydroxyvitamin D to nanomoles per liter, multiply by 2.50; to convert values for 1,25-dihydroxyvitamin D to picomoles per liter, multiply by 2.40; and to convert the values for parathyroid hormone to picomoles per liter, multiply by 0.11.

↵† Serum calcium was corrected for albumin concentration by using the following formula: corrected calcium (mg/dL) = total calcium (mg/dL) + 1.2 × [4 − albumin (g/dL)].

↵‡ As determined by 24-hour collection of urine after oral administration of Ca

^{45}and intravenous administration of Ca^{47}.