Table 4.

Backward stepwise multivariate logistic regression in ACS patients.

Variables	BNP				LVEF
	β	OR	95% CI	P-value	β	OR	95% CI	P-value
Model 1
Age (years)	0.048	1.049	1.016–1.083	0.003				0.824
Gender				0.213	0.971	2.640	1.228–5.678	0.013
Serum calcium quartile	−0.564	0.569	0.429–0.754	< 0.001	−0.228	0.796	0.623–1.016	0.066
Model 2
Age (years)				0.388	−0.071	0.931	0.900–0.965	< 0.001
Gender				0.956	0.904	2.469	1.095–5.565	0.029
Serum calcium quartile	−0.329	0.720	0.519–0.997	0.048				0.402
Serum albumin (g/L)	−0.104	0.901	0.802–1.012	0.080				0.578
Creatinine (μmol/L)	0.020	1.020	1.005–1.035	0.010				0.943
Serum phosphorus (mmol/L)				0.120				0.780
GRACE score	0.041	1.042	1.027–1.057	< 0.001	0.049	1.050	1.035–1.066	< 0.001

In Model 1, age, gender and serum calcium quartile were used as the independent variables.

In Model 2, age, gender, serum calcium quartile, serum phosphorus, serum albumin, creatinine and GRACE score were included as the independent variables.

The bold values indicate statistical differences.