Corrected calcium
Albumin-adjusted total calcium
Corrected calcium
Albumin-adjusted total calcium
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The Payne correction performs poorly in critical illness and CKD; ionised calcium is preferred where available.
Source: Payne RB et al. Interpretation of serum calcium in patients with abnormal serum proteins. BMJ 1973;4(5893):643-646.Open
Interpretation
- Low — < 8.5 mg/dL
- Normal range — 8.5–10.5 mg/dL
- Raised — > 10.5 mg/dL — investigate hypercalcaemia.
The Payne correction performs poorly in critical illness and CKD; ionised calcium is preferred where available.
These tools do not replace clinical judgement. Interpret the result in the context of the whole patient.