Association between Low Free Triiodothyronine Levels and Poor Prognosis in Patients with Acute ST-Elevation Myocardial Infarction

Table 2

Multivariate Cox proportional hazard regression analysis of predictors of 30-day and 1-year all-cause death.

Variables	Hazard ratio	95% CI	P
30-day
Female sex	2.195	1.296–3.718	0.003
Killip class	1.847	1.472–2.316	<0.001
Ejection fraction	0.956	0.932–0.981	0.001
fT3	0.702	0.501–0.983	0.040
Serum creatinine	1.003	1.001–1.006	0.004
TnI	1.041	1.019–1.065	<0.001
Reperfusion	0.272	0.152–0.486	<0.001
1-year
Female sex	1.793	1.129–2.848	0.013
Age	1.027	1.007–1.047	0.009
Heart rate	1.015	1.005–1.025	0.003
Killip class	1.466	1.209–1.779	<0.001
Ejection fraction	0.964	0.943–0.986	0.001
fT3	0.557	0.411–0.755	<0.001
fT4	1.096	1.027–1.169	0.006
TnI	1.029	1.010–1.050	0.003
HDL-C	0.444	0.204–0.968	0.041
Reperfusion	0.363	0.225–0.585	<0.001

fT3: free triiodothyronine; fT4: free thyroxine; TnI: troponin I; HDL-C: high-density lipoprotein cholesterol.