Table 4. Multivariate Cox regression analysis for 28 day mortality in hypocalcaemic patients (p<0.05*).

Parameter	Hazard ratio (Confidence interval)	p-value
Hypocalcaemia	2.000 (1.459; 2.741)	<0.001*
Age	1.029 (1.019; 1.040)	<0.001*
Sex	1.045 (0.762; 1.433)	0.783
Creatinine	1.001 (1.000; 1.002)	0.031
Diuretic therapy	0.687 (0.470; 1.003)	0.052