Table 2: Step-by-step individual regression model of the relationship between channels and heart rate variability.

Channels	b	SE	t	p
Constant	78.83	8.49	9.28	0.001
LIr	-9.73	3.02	-3.21	0.009
TEr	-22.61	6.59	-3.24	0.006
GBl	43.54	10.37	4.19	0.001
SPl	12.24	3.24	3.76	0.003
LRl	-11.13	4.74	-2.34	0.040
BLr	-7.36	1.47	-4.99	0.001

R-SQ. (ADJ.)= 0.78; 28 observations.