. 2018 Nov 6;13(11):e0206828. doi: 10.1371/journal.pone.0206828

Table 1. Step difference¹ from observed step count for the iOS smartphone for different speeds (slow, fast) and distances (6m, 10m, 20m) and GEE adjusted negative binomial regression model of absolute step difference.

	Slow Speed² (n-153)		P-value³	Normal Speed⁴ (n = 156)		P-value³
	Shake	Native Software		Shake	Native Software
6m	2.16±1.97	8.15±4.48	<0.001	1.93±1.60	5.44±3.82	<0.001
10m	2.85±2.77	5.38±4.84	<0.001	2.48±2.19	2.94±3.37	0.188
20m	5.22±5.22	7.41±7.89	0.029	4.32±3.87	5.24±3.14	0.112

1. Absolute off, no directionality, step difference (either over or under) observed step count.

2. Slow speed is < 1 meter/second

3. P-values are from a GEE adjusted (participant level) negative binomial regression model of absolute step difference.

4. Normal speed is >1 meter/second

Table 1. Step difference1 from observed step count for the iOS smartphone for different speeds (slow, fast) and distances (6m, 10m, 20m) and GEE adjusted negative binomial regression model of absolute step difference.