Table 4.

Multivariate Analysis of Time Domain HRV for Baseline and Exit Mental Arithmetic and COP Testing

Time Domain HRV Variable	Pairwise Group Comparison	Treatment Differences	Standard Error	p-value
mean NN	TA vs. SA	−2.363	18.15	0.90
	TA vs. WC	−13.093	18.81	0.49
	SA vs. WC	−10.730	16.89	0.53
SDNN	TA vs. SA	9.578	4.34	0.027
	TA vs. WC	6.626	4.36	0.129
	SA vs. WC	−2.952	3.70	0.425
rMSSD	TA vs. SA	3.109	2.13	0.14
	TA vs. WC	1.887	1.97	0.34
	SA vs. WC	−1.221	2.12	0.57
pNN50	TA vs. SA	2.375	1.65	0.15
	TA vs. WC	1.692	1.51	0.26
	SA vs. WC	−0.683	1.76	0.70

Abbreviations as in the text