Table 2.

Validity of gait outcomes obtained from the Gait&Balance (G&B) application compared to the 3D motion capture (MoCap) system.

Outcome	MoCap	G&B App	95% LoA	LoA%	Agreement Interpretation	rp [95% CI]	Consistency Interpretation
Comfortable walking with the head forward
Periodicity (%)	68 ± 3	70 ± 3	−2, 7	10	Moderate	0.69 [0.55, 0.79]	Moderate
SLAv (m)	0.68 ± 0.06	0.67 ± 0.06	−0.07, 0.07	11	Moderate	0.81 [0.72, 0.87]	Moderate
STAv (s)	0.54 ± 0.04	0.54 ± 0.04	−0.01, 0.02	3	Excellent	0.99 [0.98, 0.99]	Excellent
SLVr (%)	4 ± 1	3 ± 1	−4, 2	109	Poor	0.20 [−0.02, 0.39]	Poor
STVr (%)	2.5 ± 0.8	2.9 ± 1	−1.5, 2.2	80	Poor	0.40 [0.20, 0.57]	Poor
SLAs (%)	4 ± 3	3 ± 2	−8, 5	217	Poor	0.37 [0.17, 0.54]	Poor
STAs (%)	2 ± 2	3 ± 2	−3, 6	212	Poor	0.37 [0.17, 0.54]	Poor
WS (m/s)	1.27 ± 0.16	1.25 ± 0.14	−0.15, 0.12	12	Moderate	0.91 [0.86, 0.94]	Good
Comfortable walking while turning the head
Periodicity (%)	67 ± 3	69 ± 3	−2, 6	8	Good	0.77 [0.67, 0.84]	Moderate
SLAv (m)	0.64 ± 0.05	0.65 ± 0.05	−0.06, 0.07	10	Moderate	0.80 [0.70, 0.86]	Moderate
STAv (s)	0.55 ± 0.04	0.56 ± 0.04	−0.01, 0.02	3	Excellent	0.99 [0.98, 0.99]	Excellent
SLVr (%)	5 ± 2	3 ± 1	−6, 3	140	Poor	0.37 [0.17, 0.54]	Poor
STVr (%)	2.5 ± 0.9	3.0 ± 0.8	−1.3, 2.2	79	Poor	0.44 [0.24, 0.59]	Poor
SLAs (%)	5 ± 4	3 ± 3	−8, 5	197	Poor	0.52 [0.34, 0.66]	Poor
STAs (%)	2 ± 2	3 ± 2	−4, 7	283	Poor	0.14 [−0.07, 0.34]	Poor
WS (m/s)	1.18 ± 0.13	1.16 ± 0.13	−0.13, 0.11	11	Moderate	0.88 [0.82, 0.92]	Good

Descriptive statistics are presented as mean ± standard deviation. LoA = limits of agreement; LoA% = upper limits of agreement in percentage; ‘r_p’ = partial Pearson’s product–moment correlation coefficient; CI = confidence intervals; SL_Av = average step length; ST_Av = average step time; SL_Vr = step length variability; ST_Vr = step time variability; SL_As = step length asymmetry; ST_As = step time asymmetry; WS = walking speed.