Table 2.

Cox proportional regression analysis of all-cause mortality

Variable	HR	95 % CI	p value
Univariate Cox regression analysis
Age	1.057	1.013–1.103	0.010
Female sex	0.463	0.108–1.989	0.301
Estimated glomerular filtration rate on admission	0.970	0.947–0.993	0.010
Angiotensin-converting enzyme inhibitors or angiotensin receptor blockers	0.464	0.180–1.197	0.112
Beta-blockers	0.367	0.148–0.910	0.031
Left ventricular ejection fraction at discharge	0.987	0.951–1.025	0.497
B-type natriuretic peptide	1.001	0.999–1.002	0.235
Final TIMI flow grade ≤ 2	2.176	0.797–5.939	0.129
Multivariate Cox regression analysis adjusted for propensity scorea
Beta-blockers	0.309	0.116–0.822	0.019

HR hazard ratio, CI confidential interval, TIMI thrombolysis in myocardial infarction

^aThe potential confounders used in the calculation of the propensity score included age, left ventricular ejection fraction, estimated glomerular filtration rate on admission, administration of angiotensin-converting enzyme inhibitors or angiotensin receptor blockers, B-type natriuretic peptide level, and final TIMI flow grade ≤2