Table 5.

Results of Pearson's correlation analysis between pre-/post-test changes in cognitive performance and PFC activity.

HbO2 variables			Cognitive performance variables
			TMT-B (EF, shifting)		Stroop word-color (EF, inhibition)		Executive control (EF, working) memory)		TMT-A (processing) speed)
Averaged time-frame	Walking speed	Hemisphere	r	p, two-tailed	r	p, two-tailed	r	p, two-tailed	r	p, two-tailed
t1–7	Preferred	Left PFC	0.34	0.051t	0.16	0.366	−0.08	0.639	0.33	0.062t
		Right PFC	−0.05	0.789	0.23	0.208	−0.29	0.119	0.04	0.843
	Fast	Left PFC	0.39	0.023*	−0.15	0.391	−0.06	0.759	0.37	0.036*
		Right PFC	−0.03	0.879	−0.43	0.016*	−0.33	0.069t	−0.04	0.814
t10-25	Preferred	Left PFC	0.13	0.465	−0.09	0.616	0.08	0.673	0.03	0.877
		Right PFC	−0.03	0.891	−0.15	0.417	−0.18	0.337	0.31	0.089t
	Fast	Left PFC	0.11	0.560	−0.12	0.517	−0.23	0.207	−0.17	0.356
		Right PFC	0.01	0.970	0.13	0.494	−0.35	0.056t	0.05	0.788
t26-34	Preferred	Left PFC	−0.13	0.474	−0.12	0.502	0.09	0.636	−0.18	0.325
		Right PFC	−0.05	0.788	−0.12	0.507	0.11	0.547	0.00	0.996
	Fast	Left PFC	−0.01	0.943	−0.19	0.296	0.02	0.908	−0.03	0.883
		Right PFC	0.00	0.988	0.12	0.522	−0.06	0.753	0.50	0.004**

Bold values indicate trend or significance,

^tp < 0.10 trend,

^*p < 0.05,

^**p < 0.01; EF, executive function; TMT-A, Trailmaking Test A; TMT-B, Trailmaking Test B; PFC, prefrontal cortex.