The validity and reliability of the OneStep smartphone application under various gait conditions in healthy adults with feasibility in clinical practice

Christensen, Jesse C.; Stanley, Ethan C.; Oro, Evan G.; Carlson, Hunter B.; Naveh, Yuval Y.; Shalita, Rotem; Teitz, Levi S.

doi:10.1186/s13018-022-03300-4

Journal of Orthopaedic Surgery and Research

Table 3 Spatiotemporal comparison between motion capture system and smartphone application

From: The validity and reliability of the OneStep smartphone application under various gait conditions in healthy adults with feasibility in clinical practice

Gait conditions	System	Mean, SD	r^ꞙ
Pooled gait conditions
Double limb stance time (s)	Vicon	0.279, 0.094	0.96
	OneStep	0.269, 0.084
Single limb stance time (s)	Vicon	0.656, 0.128	0.99
	OneStep	0.655, 0.124
Step length (m)	Vicon	0.711, 0.139	0.91
	OneStep	0.678, 0.114
Cadence (steps/min)	Vicon	59.51, 9.58	0.99
	OneStep	59.49, 9.54
Stride length (m)	Vicon	1.43, 0.269	0.95
	OneStep	1.34, 0.221
Swing time (s)	Vicon	0.377, 0.041	0.95
	OneStep	0.378, 0.044
Gait speed (m/s)	Vicon	1.42, 0.439	0.97
	OneStep	1.32, 0.377
Self-selected gait speed
Double limb stance time (s)	Vicon	0.264, 0.030	0.62
	OneStep	0.250, 0.029
Single limb stance time (s)	Vicon	0.641, 0.042	0.95
	OneStep	0.638, 0.045
Step length (m)	Vicon	0.728, 0.060	0.65
	OneStep	0.682, 0.040
Cadence (steps/min)	Vicon	59.12, 3.61	0.99
	OneStep	59.11, 3.61
Stride length (m)	Vicon	1.46, 0.103	0.80
	OneStep	1.36, 0.019
Swing time (s)	Vicon	0.377, 0.025	0.85
	OneStep	0.380, 0.020
Gait speed (m/s)	Vicon	1.44, 0.127	0.89
	OneStep	1.34, 0.124
Fixed gait speed 0.8 m/s
Double limb stance time (s)	Vicon	0.418, 0.037	0.83
	OneStep	0.396, 0.035
Single limb stance time (s)	Vicon	0.840, 0.055	0.97
	OneStep	0.834, 0.056
Step length (m)	Vicon	0.518, 0.037	0.58
	OneStep	0.523, 0.030
Cadence (steps/min)	Vicon	47.63, 3.15	0.99
	OneStep	47.62, 3.16
Stride length (m)	Vicon	1.05, 0.067	0.81
	OneStep	1.04, 0.054
Swing time (s)	Vicon	0.423, 0.033	0.92
	OneStep	0.430, 0.029
Gait speed (m/s)	Vicon	0.800, 0.012	0.85
	OneStep	0.789, 0.032
Fixed gait speed 2.0 m/s
Double limb stance time (s)	Vicon	0.171, 0.020	0.63
	OneStep	0.179, 0.020
Single limb stance time (s)	Vicon	0.503, 0.037	0.97
	OneStep	0.513, 0.039
Step length (m)	Vicon	0.870, 0.076	0.45
	OneStep	0.829, 0.076
Cadence (steps/min)	Vicon	72.10, 5.64	0.99
	OneStep	72.03, 5.55
Stride length (m)	Vicon	1.75, 0.134	0.81
	OneStep	1.57, 0.165
Swing time (s)	Vicon	0.332, 0.024	0.92
	OneStep	0.324, 0.022
Gait speed (m/s)	Vicon	2.00, 0.102	0.71
	OneStep	1.80, 0.109
Self-selected gait speed and dual task
Double limb stance time (s)	Vicon	0.264, 0.030	0.83
	OneStep	0.250, 0.032
Single limb stance time (s)	Vicon	0.639, 0.040	0.96
	OneStep	0.636, 0.044
Step length (m)	Vicon	0.728, 0.058	0.63
	OneStep	0.698, 0.047
Cadence (steps/min)	Vicon	59.18, 3.31	0.99
	OneStep	59.20, 3.33
Stride length (m)	Vicon	1.46, 0.108	0.76
	OneStep	1.39, 0.100
Swing time (s)	Vicon	0.377, 0.023	0.85
	OneStep	0.379, 0.020
Gait speed (m/s)	Vicon	1.44, 0.133	0.87
	OneStep	1.37, 0.140

Standard deviation (SD), Pearson correlation coefficient (r)
^ꞙ< 0.30 (negligible), 0.30–0.50 (low), 0.50–0.70 (moderate), 0.70–0.90 (high), > 0.90 (very high)

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