TABLE 5.

Cox regression analyses of risk factors for in-hospital mortality among coronary care unit patients with AMI (after PSM).

Variable	Univariate analysis		Multivariate analysis
	HR (95% CI)	P	HR (95% CI)	P
Age	1.008(0.991–1.026)	0.366
Gender (male)	1.184(0.804–1.744)	0.392
CCI	0.891(0.809–0.982)	0.019	0.851(0.768–0.943)	0.002
LODS	1.048(0.997–1.102)	0.066	0.941(0.852–1.039)	0.228
OASIS	1.009(0.989–1.029)	0.398
SAPS II	1.018(1.004–1.031)	0.010	1.020(1.002–1.040)	0.017
SAPS III	1.012(1.005–1.019)	<0.001	1.014(1.001–1.026)	0.038
MV	0.687(0.470–1.005)	0.053	0.372(0.226–0.614)	<0.001
PCI/CABG	0.860(0.573–1.289)	0.465
AKI	0.609(0.324–1.143)	0.122
AG	1.120(1.067–1.177)	<0.001	1.105(1.049–1.064)	<0.001

PSM, propensity score matching; AMI, acute myocardial infarction; HR, hazard ratio; CI, confidence interval; CCI, charlson comorbidity index; AG, anion gap; AKI, acute kidney injury; LODS, logistic organ dysfunction system; OASIS, oxford acute severity of illness score; SAPS, simplified acute physiology score; MV, mechanical ventilation; PCI, percutaneous coronary intervention; CABG, coronary artery bypass grafting.