Table 2. Means and variability of spatiotemporal parameters of the MCI and control groups during SF and FS conditions.

Parameters	MCI group (n = 25)		Control group (n = 25)		p-value
	SF	FS	SF	FS	Group	Condition	Interaction
Means spatiotemporal parameters
Step length (cm)	62.18 ± 9.18	59.57 ± 8.44	63.05 ± 6.91	61.77 ± 7.13	0.48	0.01a	0.32
Step width (cm)	7.06 ± 1.93	7.56 ± 2.19	7.51 ± 2.50	7.96 ± 2.76	0.52	0.01a	0.89
Step time (s)	0.51 ± 0.04	0.48 ± 0.04	0.51 ± 0.03	0.50 ± 0.04	0.21	0.001a	0.16
Swing time (s)	0.46 ± 0.03	0.46 ± 0.04	0.46 ± 0.04	0.46 ± 0.04	0.89	0.84	0.50
Variability of spatiotemporal parameters, Coefficient of variation
Step length variability	10.00 ± 3.97	13.93 ± 5.38	10.65 ± 3.02	11.12 ± 3.15	0.24	0.002a	0.01a
Step width variability	37.17 ± 10.43	37.10 ± 10.89	34.10 ± 10.38	33.98 ± 10.78	0.20	0.96	0.99
Step time variability	12.75 ± 3.67	9.63 ± 3.57	13.78 ± 3.07	10.71 ± 3.29	0.21	0.001a	0.97
Swing time variability	13.32 ± 6.01	13.35 ± 6.01	13.53 ± 4.52	10.43 ± 2.87	0.24	0.08	0.03a

Data are expressed as means and SD. Group × Walking condition interaction as calculated by using a 2 groups x 2 walking conditions mixed model repeated measures ANOVA.

^aSignificant difference at p < 0.05.

SF = Slow to fast speed condition; FS = Fast to slow speed condition.