Table 1.

Comparison of baseline characteristics between treated and control subjects in the case study

Variable	Before Matching			After Matching
	Control	Treated	Standardized	Control	Treated	Standardized
	(Mean/Prevalence)	(Mean/Prevalence)	Difference	(Mean/Prevalence)	(Mean/Prevalence)	Difference
Age	68.1	63.3	0.366	63.3	63.3	0.000
Heart Rate	84.6	81.6	0.127	81.4	81.6	0.007
Systolic BP	148.3	149.3	0.033	149.7	149.3	0.013
Creatinine	105.8	99.7	0.105	99.0	99.7	0.015
Previous AMI	20.8%	26%	0.124	25.5%	26%	0.011
Previous heart failure	4.6%	2.9%	0.089	3.0%	2.9%	0.004
Elevated cardiac enzymes	93.6%	95.1%	0.067	95.6%	95.1%	0.023
ST‐depression MI	47.2%	49.7%	0.050	49.0%	49.7%	0.014
In‐hospital PCI	0.8%	1.7%	0.079	1.4%	1.7%	0.024

The variables in the table are components of the GRACE risk score for predicting mortality in patients with acute coronary syndromes40