TABLE 2.

Means and standard deviation of dual task interference on gait parameters (Δ_DTW–STW) and cognitive task error for pre- and post-intervention.

	Older adults				Young adults
Variables	Active tDCS (n = 10)		Sham tDCS (n = 8)		Active tDCS (n = 12)		Sham tDCS (n = 11)
	Pre	Post	Pre	Post	Pre	Post	Pre	Post
Cadence (step/min)	−0.08 ± 3.24	1.64 ± 1.68	−0.30 ± 3.50	0.92 ± 1.16	−0.01 ± 2.42	0.13 ± 0.85	0.22 ± 0.88	0.64 ± 1.00
Stance time ratioa	−0.002 ± 0.004	0.004 ± 0.009	−0.006 ± 0.012	0.000 ± 0.007	−0.001 ± 0.007	−0.002 ± 0.003	0.001 ± 0.003	0.000 ± 0.002
Stride time variability (s)	0.024 ± 0.034	−0.010 ± 0.020	0.050 ± 0.048	0.010 ± 0.040	−0.005 ± 0.064	−0.003 ± 0.004	0.001 ± 0.007	0.001 ± 0.018
Stride length variability (s)	−0.011 ± 0.012	0.005 ± 0.021	0.004 ± 0.021	0.007 ± 0.018	−0.023 ± 0.025	−0.013 ± 0.019	−0.012 ± 0.014	−0.012 ± 0.016
Cognitive task errors (%)b	3.53 ± 4.07	3.98 ± 5.78	4.32 ± 5.10	3.68 ± 7.35	4.15 ± 4.69	1.05 ± 1.60	4.58 ± 7.25	2.93 ± 5.51

^aRatio between the foot contact time and the stride time. ^bDigit vigilance task.