Table 2 Comparison of serum and ionized calcium, parathyroid hormone, and 1,25-dihydroxycholecalciferol levels
Affected cat | Healthy cat | ||||
|---|---|---|---|---|---|
Reference range | 6-month-old, intact female | 6-month-old, intact male | 9-month-old, spayed female | ||
Serum calcium (mmol/L) | 2.05–3.02 | 1.62 | 2.52 | 2.40 | 2.34 |
Ionized calcium (mmol/L) | 1.20–1.35 | 0.74 | 1.31 | 1.26 | 1.29 |
Parathyroid hormone (pg/mL) | 8.0–25.0 | 99.7 | 8.7 | 9.9 | 9.2 |
25-hydroxycholecalciferol (nmol/L) | ― | 12 | 133 | 148 | 126 |
1,25-dihydroxycholecalciferol (pg/mL) | ― | 23.1 | 232 | 251 | 227 |