. Author manuscript; available in PMC: 2011 May 4.

Published in final edited form as: J Am Coll Cardiol. 2010 Jan 29;55(18):1955–1961. doi: 10.1016/j.jacc.2009.12.015

Table 3.

ROC Curve Analysis of Variables

			90% Sensitivity
	AUC	95% CI	Cutoff	Specificity
Baseline QT interval	0.836	0.758–0.914^*	395	50.9%
Baseline QTc interval	0.850	0.775–0.925^*	423	61.4%
QT interval at maximal heart rate	0.900	0.840–0.960^*	375	70.2%
QTc interval at maximal heart rate	0.933	0.889–0.978^*	474	75.4%
QTc interval during QT interval stretching	0.923	0.874–0.973^*	487	86.0%

p < 0.001 for all receiver-operating characteristic (ROC) curves.

AUC = area under the curve; CI = confidence interval; QTc = corrected QT.