Table 2.

Unadjusted odds ratios for each electrocardiography measurement from conditional logistic regression

	Odds ratio	95% confidence interval
Heart rate (beats/min)	1.28	1.07–1.53
QRS (ms)	1.36	1.13–1.62
QT (ms)	1.04	0.98–1.11
QTc	1.08	1.02–1.14
QT dispersion	1.12	1.00–1.26
Adjusted QT dispersion	1.58	1.08–2.32
JT dispersion	1.12	1.00–1.25
R wave in aVR (mm)a	1.62	1.16–2.24
R/S ratio in aVRb	3	1.66–5.40

Odds ratios refer to a 10-unit change. ^a Odds ratio refers to a 5-unit change. ^b Odds ratio refers to a 0.5-unit change.