TABLE 3.

Summary of main effect and interactions in 3-way linear mixed models analyses of gait parameters.

Gait parameters	Main effect			Interactions
	Age groupc	Intervention groupd	Timee	Age × Time	Intervention × Time
Cadence	ns	ns	ns	ns	ns
Stance time ratioa	ns	ns	ns	OA: Pre < Post	ns
Stride time variability	ns	ns	Pre > Post	Pre: OA > YA	ns
				OA: Pre > Post
Stride length variability	ns	ns	ns	ns	ns
Cognitive task errorsb	ns	ns	ns	ns	ns

^aRatio between the foot contact time and the stride time. ^bDigit vigilance task. ^cOlder adults (OA) vs. young adults (YA). ^dActive tDCS + STW vs. Sham tDCS + STW. ^ePre- vs. post-intervention. ns: not significant.