Table 5.

 Poisson regression models of effects of calcium supplementation or placebo and other variables on composite end point (myocardial infarction, stroke, or sudden death) in healthy postmenopausal women

Variable	χ2	P value*
Model 1:
Intercept	370.4	<0.001
Calcium or placebo	3.72	0.05
Log likelihood −444.4
Model 2:
Intercept	232.86	<0.001
Calcium or placebo	3.77	0.05
Glomerular filtration rate	0.67	0.41
Age group (split at median)	20.07	<0.001
Log likelihood −432.3
Model 3:
Intercept	0.23	0.63
Calcium or placebo	2.99	0.08
Glomerular filtration rate	0.31	0.58
Age group	16.91	<0.001
History of cerebrovascular disease	14.84	0.0001
Dyslipidaemia	2.69	0.10
Diabetes	2.34	0.13
Hypertension	0.00	0.96
History of ischaemic heart disease	4.31	0.04
Compliance with study tablets	9.32	0.002
Log likelihood −419.4

*Based on Poisson regression and χ² test.