. Author manuscript; available in PMC: 2018 Nov 29.

Published in final edited form as: Ann Noninvasive Electrocardiol. 2018 Aug 20;23(6):e12591. doi: 10.1111/anec.12591

Table 2.

ECG parameters associated with LVEF ≤35% in the multivariable model and included in the expanded abnormal ECG marker total, in the Cedars-Sinai validation population.

	Initial model with all ECG parameters		Final model retaining parameters if p<0.10^*
ECG parameter	Odds ratio (95% CI)	p-value	Odds ratio (95% CI)	p-value
Heart rate >85bpm	1.9 (1.5–2.3)	p<0.001	1.8 (1.5–2.2)	p<0.001
QRS >110ms	1.3 (1.0–1.6)	0.06	1.3 (1.0–1.6)	p=0.04
QTc ≥460ms men; ≥470ms women	2.9 (2.3–3.6)	p<0.001	2.9 (2.3–3.6)	p<0.001
QRS-T angle >90^o	2.6 (2.1–3.3)	p<0.001	2.6 (2.1–3.3)	p<0.001
Delayed QRS transition	3.1 (2.5–3.9)	p<0.001	3.1 (2.5–3.9)	p<0.001
Delayed intrinsicoid deflection	5.4 (4.2–6.9)	p<0.001	5.5 (4.3–7.1)	p<0.001
Left ventricular hypertrophy	1.0 (0.7–1.4)	0.90	--
PR >200ms‡	1.1 (0.8–1.4)	0.64	--
P-wave >110ms‡	1.2 (0.9–1.6)	0.13	--

Initial multivariable model included all ECG parameters. Final multivariable model resulted from stepwise logistic regression, with p<0.30 to enter model and p<0.10 to retain in model. LVH, prolonged PR interval and P-wave duration did not remain significant, were omitted from the final model, and were not included in the abnormal ECG marker total. C-statistic of the model was 0.846, goodness of fit test p=0.11.