. 2021 Jun 7;21(11):3940. doi: 10.3390/s21113940

Table 6.

Orientation invariance results (n = 7138 strides). Shown are mean values (standard deviation), RMSD, Correlation—with Spearman or Pearson—and equivalence interval (p-value). ^† All correlations have p < 0.01. ^‡ All equivalence tests are based on Paired T-test, except for turning angle, which is based on Wilcoxon signed-rank test.

Metric	Original Orientation	Random Rotations	RMSD	Correlation ^†	Equivalence ^‡
Stride dur. (s)	$1.23 (0.26)$	$1.23 (0.26)$	$0.0$	$r_{p} = 1.0$	$\pm 0.01 (0.0)$
Swing dur. (s)	$0.41 (0.08)$	$0.41 (0.08)$	$0.0$	$r_{p} = 1.0$	$\pm 0.00 (0.0)$
Stance dur. (s)	$0.82 (0.20)$	$0.82 (0.20)$	$0.0$	$r_{p} = 1.0$	$\pm 0.01 (0.0)$
Cad. (st/min)	$100.7 (17.9)$	$100.7 (17.9)$	$0.0$	$r_{p} = 1.0$	$\pm 1.01 (0.0)$
SL (cm)	$120.4 (25.5)$	$120.4 (25.5)$	$0.0$	$r_{p} = 1.0$	$\pm 1.20 (0.0)$
Speed (cm/s)	$102.9 (34.3)$	$102.9 (34.3)$	$0.0$	$r_{p} = 1.0$	$\pm 1.03 (0.0)$
SW (cm)	$9.8 (9.2)$	$9.8 (9.2)$	$0.0$	$r_{p} = 1.0$	$\pm 0.10 (0.0)$
MTC (cm)	$1.7 (1.0)$	$1.7 (1.0)$	$0.0$	$r_{p} = 1.0$	$\pm 0.02 (0.0)$
Turn angle ( $^{\circ}$ )	$37.4 (41.0)$	$37.4 (41.0)$	$1.5$	$r_{s} = 0.99$	$\pm 0.37 (0.0)$