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. Author manuscript; available in PMC: 2011 Aug 1.

Published in final edited form as: Heart Rhythm. 2010 May 15;7(8):1077–1084. doi: 10.1016/j.hrthm.2010.05.018

Table 1.

Binary QT dynamics and HRR predictors

		Kaplan-Meier		Cox proportional hazards
Variable	Abnormal cutpoint	p by log-rank	χ²	Hazard Ratio	95% CI	p
QT at 500 ms	>316 ms	<0.0001	28.1	2.13	1.60–2.84	<0.001
QT at 600 ms	>354 ms	<0.0001	17.1	1.78	1.35–2.35	<0.001
QT-RR slope	<0.292	0.0001	15.7	1.85	1.36–2.52	<0.001
HRR	<12 bpm	<0.0001	64.8	2.99	2.26–3.96	<0.001