Table 5.

Performance on the validation set, excluding turning strides (n = 3785 strides). Shown are mean values (standard deviation), limits of agreement, RMSE, correlation and equivalence interval (p-value). ^† All correlations were based on Spearman and have $p<0.01$. ^‡ Equivalence tests were based on Wilcoxon signed-rank test.

Metric	IMU	VICON	Rel. Error	Abs. Error	Lim. Agr.	RMSE	Corr. †	Equival. ‡
Stride dur. (s)	$1.22\left(0.24\right)$	$1.22\left(0.24\right)$	$0.00\left(0.04\right)$	$0.02\left(0.04\right)$	$[-0.08,0.08]$	$0.04$	$0.99$	$\pm 0.06\left(0.0\right)$
Swing dur. (s)	$0.41\left(0.07\right)$	$0.40\left(0.06\right)$	$0.00\left(0.04\right)$	$0.02\left(0.04\right)$	$[-0.08,0.09]$	$0.04$	$0.89$	$\pm 0.02\left(0.0\right)$
Stance dur. (s)	$0.81\left(0.19\right)$	$0.82\left(0.19\right)$	$0.00\left(0.04\right)$	$0.02\left(0.03\right)$	$[-0.09,0.08]$	$0.04$	$0.98$	$\pm 0.04\left(0.0\right)$
Cad. (st/min)	$101.8\left(17.6\right)$	$101.5\left(17.4\right)$	$0.3\left(2.5\right)$	$1.5\left(2.1\right)$	$[-4.7,5.2]$	$2.5$	$0.99$	$\pm 5.08\left(0.0\right)$
SL (cm)	$129.8\left(18.3\right)$	$133.7\left(20.7\right)$	$-3.9\left(6.2\right)$	$4.6\left(5.8\right)$	$[-16.1,8.2]$	$7.4$	$0.98$	$\pm 6.69\left(0.0\right)$
Speed (cm/s)	$112.0\left(31.9\right)$	$115.3\left(35.1\right)$	$-3.4\left(6.9\right)$	$4.4\left(6.3\right)$	$[-17.0,10.2]$	$7.7$	$0.99$	$\pm 5.77\left(0.0\right)$
SW (cm)	$4.9\left(3.2\right)$	$4.7\left(2.2\right)$	$0.1\left(2.8\right)$	$0.9\left(2.7\right)$	$[-5.4,5.6]$	$2.8$	$0.84$	$\pm 0.24\left(0.0\right)$
MTC (cm)	$1.4\left(0.7\right)$	$1.8\left(0.6\right)$	$-0.4\left(0.7\right)$	$0.6\left(0.5\right)$	$[-1.7,0.9]$	$0.8$	$0.55$	$\pm 0.09\left(1.0\right)$
Turn angle (${}^{\circ }$)	$6.4\left(7.0\right)$	$5.1\left(4.8\right)$	$1.2\left(5.1\right)$	$1.5\left(5.1\right)$	$[-8.8,11.3]$	$5.3$	$0.68$	$\pm 0.26\left(1.0\right)$