Table 3.

Cox regression analysis for independent risk factors of long-term mortality

Risk factors	Univariate			Multivariate
	HR	95% CI	P	HR	95% CI	P
Age	1.10	1.02-1.18	0.012	1.05	0.98-1.13	0.153
SCr>1.5 mg/dL	2.60	1.16-5.81	0.02	1.29	0.53-3.11	0.578
Heart failure at admission	3.79	2.11-6.82	<0.001	1.97	0.96-4.04	0.065
Anemia	3.69	1.78-7.64	<0.001	2.58	1.22-5.48	0.014
Perioperative hypotension	4.13	1.99-8.56	<0.001	1.69	0.75-3.84	0.208
Myocardial infarction	3.46	1.88-6.34	<0.001	1.52	0.72-3.19	0.268
Low fT3	3.73	2.09-6.67	<0.001	2.00	1.04-3.83	0.037

HR - hazard ratio; CI - confidence interval; SCr - serum creatinine; fT₃ - free triiodothyronine