Table 6.

Final random effects model summarizing the significant, independent factors to explain the changes in the QTcB interval over time

Effect	Sex	Estimate	Standard error	DF	t Value	Pr > |t|
Intercept		373.06	9.3613	52	39.85	<0.0001
Time		−0.016	0.00421	296	−3.8	0.0002
Age		0.4153	0.215	296	1.93	0.0543
Sex	F	20.8761	4.6453	296	4.49	<0.0001
Sex	M	0	.	.	.	.
ECG heart rate		0.1461	0.06916	296	2.11	0.0355
DAQ concentrations		0.02972	0.01026	296	2.9	0.0041