Table 4.

Multivariate logistic regression analysis for biochemical abnormalities with hypocalcemia.

Explanatory variable	OR (95% CI)	P value
APACHE II	1.00 (0.98-1.02)	0.72
Sepsis (first 3 days)	1.03 (0.76-1.38)	0.87
Sodium	0.96 (0.94-0.99)	0.002
Phosphate	1.30 (1.00-1.69)	0.052
Magnesium	0.37 (0.17-0.81)	0.013
Lactate	1.11 (1.03-1.20)	0.007
Albumin	0.93 (0.91-0.94)	<0.001

Variables entered into model were those with P < 0.25 on univariate analysis. APACHE II, sodium, phosphate, magnesium, lactate and albumin were continuous predictors, entered linearly and sepsis a binary predictor. Outcome was iCa <1.1 mmol/L.

APACHE II, Acute Physiology and Chronic Health Evaluation II score; CI, Confidence interval; OR, Odds ratio (for ionized calcium <1.1 mmol/L).