Table 2:

Multivariate Linear regression for Predicting LVEF

	Coefficient	SE	t value	P value
Clinical Data
Sex	−1.971	1.286	−1.533	0.126
Systolic Blood Pressure	0.027	0.019	1.425	0.155
Hypertension	2.326	1.478	1.574	0.117
Diabetes Mellitus	−2.628	1.524	−1.724	0.086
Known CAD	3.150	1.628	1.934	0.054
Old Myocardial Infarction	−4.900	1.692	−2.897	0.004
Known Heart failure	−5.779	1.828	−3.162	0.002
Global ECG Metrics
JTc interval	0.048	0.016	3.018	0.003
T peak-T end	−0.058	0.027	−2.177	0.030
Initial hp-QRS axis	0.077	0.015	5.212	0.000
Terminal hp-QRS axis	−0.030	0.012	−2.561	0.011
PCA ratio at J point	−6.131	2.483	−2.469	0.014
NDV of ST-segment	0.628	0.192	3.265	0.001
NDV of T wave	−0.321	0.163	−1.973	0.049
QRS Complex
Q duration Lead V5	−0.069	0.040	−1.736	0.084
R amplitude Lead II	0.005	0.002	2.883	0.004
R amplitude Lead III	−0.006	0.002	−3.271	0.001
R duration Lead V4	−0.058	0.034	−1.689	0.092
R peak Lead aVR	−0.043	0.021	−2.096	0.037
S amplitude Lead I	−0.013	0.005	−2.775	0.006
S duration Lead V4	−0.047	0.030	−1.543	0.124
QS peak Lead V3	0.098	0.041	2.376	0.018
S` amplitude Lead V3	−0.071	0.040	−1.808	0.072
ST/T Wave
ST amplitude Lead III	0.016	0.006	2.840	0.005
T duration lead aVR	−0.025	0.011	−2.264	0.024

Model summary: R square = 0.452, F = 6.679, p < 0.001

CAD: coronary artery disease; hp: horizontal plane; PCA: principal component analysis; NDV: non-dipolar voltage;