Table 5. Multivariate Cox regression analysis* to investigate the independent predictors of MACE.

	< 75 years			≥ 75 years
	HR	95% CI	p value	HR	95% CI	p value
GRACE score	1.012	1.006-1.018	< 0.001	1.007	1.002-1.013	0.013
In-hospital revascularization	0.513	0.314-0.839	0.008	0.61	0.384-0.967	0.036
Diabetes mellitus	1.893	1.138-3.149	0.014			NS

* Adjusted for age, sex, medical history (hypertension, diabetes mellitus, hypercholesterolemia, and current smoker), in-hospital revascularization, GRACE risk score, and medications (angiotensin-converting enzyme inhibitors, β-blockers, statins).