Table 1

Classification of 343 patients with hypoalbuminemia (albumin < 33 g/L) as hypo-, normo, or hyper-calcemic using local and previously published albumin-adjusted calcium equations.

Local Equation*1


Published Equation*2

Hypocalcemia

(Ca < 2.10 mmol/L)

Normocalcemia

(Ca 2.10 – 2.55 mmol/L)

Hypercalcemia

(Ca > 2.55 mmol/L)


Hypocalcemia

(Ca < 2.10 mmol/L)

2

0

0

Normocalcemia

(Ca 2.10 – 2.55 mmol/L)

5

272

0

Hypercalcemia

(Ca > 2.55 mmol/L)

0

42

22


*1 adjusted [Ca](mmol/L) = total [Ca](mmol/L) + 0.012 (39.9 - [albumin](g/L))

*2 adjusted [Ca](mmol/L) = total [Ca](mmol/L) + 0.02 (40 - [albumin](g/L))

James et al. BMC Clinical Pathology 2008 8:12   doi:10.1186/1472-6890-8-12

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