Table 4. Correlation and multivariate logistic regression analysis in the derivation group.

Parameter	p-value*	Adjusted R2	p-value
Age	< 0.0001		-
Heart rate	< 0.0001		-
P wave duration	0.8		-
PQ	< 0.0001		-
QT	0.3		-
QTc	0.9		-
P wave dispersion	0.8		-
Tend - P	< 0.0001	0.904	< 0.005†
Tend - Q	< 0.05	0.908	< 0.005†

* p value is given for the significance level of the multivariate correlation analysis

^† values are given for ANCOVA after adjustment for Age, Heart Rate and PQ