Table 2.

Laboratory based agreement between AX3 wearable system, Gait Rite and OPAL for micro gait characteristics

Variable	AX3 wearable system vs. GaitRite			AX3 wearable system vs. OPAL
	ICC	r	LoA % (95% LoA)	ICC	r	LoA % (95% LoA)
Micro gait characteristics
Mean
Step velocity (m/s)	0.744**	0.632**	1.1 (0.06, −0.043)	0.923**	0.871**	0.4 (0.19, 0.22)
Step length (m)	−0.411	0.035	1.5 (0.56, −0.35)	0.831**	0.784**	0.6 (0.22, −0.18)
Step time (s)	0.797**	0.917**	1.1 (0.38, −0.38)	0.890**	0.948**	0.6 (0.25, −0.17)
Swing time (s)	0.431*	0.558**	1.3 (0.40, −0.21)	0.900**	0.944**	0.8 (0.22, −0.17)
Stance time (s)	0.758**	0.902**	1.2 (0.50, −0.60)	0.876**	0.871**	0.6 (0.28, −0.17)
Variability
Step velocity (m/s)	0.052	0.261	3.8 (0.28, −0.05)	0.658**	0.503*	2.1 (0.17, −0.23)
Step length (m)	0.457**	0.121	2.9 (0.175,-0.036)	0.884**	0.616**	1.6 (0.08, −0.104)
Step time (s)	0.802**	0.688**	4.5 (0.25, −0.13)	0.972**	0.940**	1.6 (0.09, −0.10)
Swing time (s)	0.389	0.694**	6.4 (0.33, −0.15)	0.968**	0.928**	1.7 (0.1, −0.11)
Stance time (s)	0.724**	0.766**	4.3 (0.26, −0.12)	0.974**	0.936**	1.5 (0.09, −0.11)
Asymmetry
Step length (m)	0.442	0.001	4.5 (0.25, −0.18)	0.464	0.381	3.6 (0.2, −0.22)
Step time (s)	0.178	0.601**	3.9 (0.49, −0.75)	0.492*	0.558**	4 (0.13, −0.08)
Swing time (s)	0.320	0.454*	6.7 (0.23, −0.33)	0.539*	0.733**	4.7 (0.13, −0.08)
Stance time (s)	0.439	0.570**	6 (0.216, −0.30)	0.504*	0.592**	4.9 (0.15, −0.09)

Vs. versus, ICC Intraclass correlation coefficient, r Spearman’s rank correlation coefficient, LoA% limits of agreement as a percentage of the mean of the two systems

**p ≤ 0.01 *p ≤ 0.05