Table 2

Correlations of QT and QTc dispersion parameters with age and other ECG measurements

	Mean QT	Mean Qtc	QTD	QTcD	QT-SD	QTc-SD	RRD	RR-SD	Age
Mean RR	0.78 (< 0.001)	−0.43	−0.06	−0.12	−0.06	−0.15	0.52 (< 0.001)	0.55 (< 0.001 )	−0.37
Mean QT		0.20	0.12	0.11	0.12	0.13	0.36	0.35	0.46
Mean QTc			0.06	−0.0005	0.09	−0.01	−0.32	−0.32	0.06
QTD				0.52 (< 0.001)	0.89 (< 0. 001)	0.44	0.08	0.09	0.04
QTcD					0.53 (< 0.001 )	0.93 (< 0. 001)	0.51 (< 0.001)	0.51 (< 0.001 )	0.01
QT-SD						0.49	0.09	0.09	0.05
QTc-SD							0.58 (< 0.001)	0.59 (< 0.001)	0.03
RRD								0.99 (< 0. 001)	0.13
RR-SD									0.13

r Values are presented as Pearson’s correlation coefficients. Numbers in parentheses are p values.