Table 5.

Reliability of the PiezoRx in measuring step count and moderate-to-vigorous physical activity.

Walking speed (km/h)	n	Step count		Moderate-to-vigorous physical activity
		Intraclass correlation (95% CI)	P value	Spearman correlation coefficient	P value	Absolute difference (sec/stage), % (SD)
2.4	25	.62 (.48 to.75)	<.001	.90	<.001	6.1 (17.3)
3.2	23	.59 (0.45 to 0.72)	<.001	.93	<.001	23.8 (55.1)
4.0	25	.33 (0.17 to 0.50)	.01	.92	<.001	22.8 (70.6)
5.6	23	.27 (0.12 to 0.49)	.02	.53	.02	2.4 (3.7)
6.4	23	.993 (0.988 to.996)	<.001	.78	.002	1.1 (2.4)
7.2	20	.98 (0.97 to 0.99)	<.001	.58	.01	3.0 (3.8)
Overall	N/A	.88 (0.86 to 0.90)	<.001	.95	<.001	10.4 (39.3)