Table 2.

ECG Changes during (first) and after (second) opioid withdrawal.

	N	Mean	Mean difference	SD	t	df	p
Pulse First	90	74.56	-3.79	11.407	-2.630	89	0.01*
Pulse Second	90	78.33		8.834
QT First	90	380.69	7.87	22.460	2.727	89	0.08*
QT Second	90	372.82		19.998
QTc First	90	435.41	17.38	16.22	14.339	89	0.001*
QTc Second	90	418.03		17.79
Tpe First	90	81.62	1.69	6.009	2.256	89	0.027*
Tpe Second	90	79.93		5.524
Tpe/QT First	90	0.221	0.008	0.005	11.236	89	0.000*
Tpe/QT Second	90	0.213		0.004
Tpe/QTc First	90	0.188	-0.001	0.016	-0.887	89	0.378
Tpe/QTc Second	90	0.189		0.013

^*p<0.05; df: degree of freedom; QTc: Corrected QT interval; SD: Standard deviation.