Table 1.

Serum and Urinary Laboratory Values Before and During Glucocorticoid Treatment

Parameter (reference range)	Before prednisone	During prednisone therapy
Serum total calcium (8.4–10.2 mg/dL)	12.9	9.8
Serum ionized calcium (4.7–5.1 mg/dL)	7.3	5.8
Serum phosphorus (2.4–4.5 mg/dL)	2.3	2.8
Serum parathyroid hormone (12–65 pg/mL)	<2.5	<2.5
Serum parathyroid hormone–related peptide (<2.0 pmol/L)	3.4	2.5
Serum 25-hydroxyvitamin D (25–80 ng/mL)	38	ND
Serum 1,25-dihydroxyvitamin D (22–67 pg/mL)	79	25
Serum creatinine (0.6–1.2 mg/dL)	1.5	1.7
24-hour urinary calcium (100–250 mg/24 h)	470	ND

Abbreviation: ND, not done.