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

Table 3

Multivariate Cox proportional hazard regression analysis of predictors of 30-day and 1-year MACE.

Variables	Hazard ratio	95% CI	P
30-day
Female sex	1.810	1.120–2.924	0.015
Heart rate	1.019	1.007–1.031	0.002
DBP	0.975	0.957–0.992	0.006
Killip class	1.449	1.177–1.785	<0.001
Ejection fraction	0.961	0.940–0.983	<0.001
fT3	0.719	0.528–0.979	0.036
Serum creatinine	1.004	1.002–1.004	<0.001
TnI	1.041	1.020–1.062	<0.001
Reperfusion	0.365	0.224–0.595	<0.001
1-year
Killip class	1.338	1.156–1.549	<0.001
Ejection fraction	0.971	0.955–0.987	<0.001
fT3	0.557	0.445–0.698	<0.001
fT4	1.067	1.014–1.123	0.013
TSH	1.100	1.009–1.199	0.031
Reperfusion	0.497	0.358–0.692	<0.001

MACE: major adverse cardiac event; DBP: diastolic blood pressure; fT3: free triiodothyronine; fT4: free thyroxine; TnI: troponin I; TSH: thyroid-stimulating hormone.