Table 3.

Test–retest reliability of spatio-temporal parameters computed by the electronic walkway (reference system) during single and dual-tasking conditions.

Condition	Gait Parameter	Visit T1 Mean (SD)	Visit T2 Mean (SD)	T1 vs. T2 p-Value	ICC [95%CI]	MDC	MDC%
Single-task	Stride velocity (cm/s)	97.6 (25.0)	95.7 (24.6)	0.242	0.97 [0.94–0.99]	18.20	24.6
	Cadence (step/min)	105.8 (9.1)	104.6 (9.9)	0.317	0.91 [0.80–0.96]	7.92	7.5
	Stride length (cm)	109.8 (22.8)	109.1 (22.8)	0.455	0.99 [0.97–0.99]	6.93	6.3
	Step time (s)	0.57 (0.05)	0.58 (0.06)	0.291	0.92 [0.81–0.96]	0.05	7.8
	Stride time (s)	1.15 (0.11)	1.16 (0.12)	0.250	0.92 [0.82–0.96]	0.09	7.7
	Swing time (s)	0.40 (0.03)	0.40 (0.03)	0.928	0.88 [0.72–0.95]	0.03	6.9
	Stance time (s)	0.75 (0.09)	0.76 (0.10)	0.206	0.94 [0.87–0.98]	0.06	8.5
	Single support time (s)	0.40 (0.03)	0.39 (0.03)	0.830	0.87 [0.70–0.94]	0.03	7.1
	Double support time (s)	0.36 (0.09)	0.36 (0.09)	0.058	0.98 [0.95–0.99]	0.04	10.3
Dual-task	Stride velocity (cm/s)	74.3 (26.6)	75.7 (25.6)	0.561	0.94 [0.88–0.98]	17.13	22.8
	Cadence (step/min)	87.6 (20.9)	89.1 (20.0)	0.436	0.94 [0.87–0.98]	13.42	15.2
	Stride length (cm)	101.6 (24.2)	101.4 (24.8)	0.989	0.98 [0.95–0.99]	10.51	10.4
	Step time (s)	0.74 (0.21)	0.72 (0.20)	0.932	0.93 [0.83–0.97]	0.16	21.3
	Stride time (s)	1.48 (0.44)	1.44 (0.41)	0.989	0.91 [0.80–0.96]	0.35	23.8
	Swing time (s)	0.49 (0.14)	0.47 (0.12)	0.476	0.94 [0.87–0.97]	0.09	18.9
	Stance time (s)	0.97 (0.29)	0.96 (0.30)	0.732	0.88 [0.73–0.95]	0.29	29.5
	Single-support time (s)	0.48 (0.13)	0.47 (0.11)	0.536	0.87 [0.71–0.94]	0.12	25.5
	Double-support time (s)	0.50 (0.20)	0.49 (0.22)	0.619	0.86 [0.67–0.94]	0.22	44.7

SD: standard deviation; CI: confidence interval; ICC: intraclass correlation coefficient; MDC: minimal detectable change.