Table 2.

Performance between Opal and Actigraph GT9X, and between Actigraph GT3X and GT9X on activity measures (FreedsonVM3).

	Opal vs. ActiGraph GT9X					ActiGraph GT3X vs. ActiGraph GT9X
Metric	Mean	SD	LB	UB	MAPE	Mean	SD	LB	UB	MAPE
Total counts (#)	−23,391.81	11,636.71	−46,199.77	−583.85	2.15	13,620.79	20,727.51	−27,005.13	54,246.72	1.24
Light activity(min)	2.78	5.34	−7.68	13.24	0.95	1.67	3.72	−5.62	8.97	0.59
Moderate activity (min)	−5.36	3.86	−12.93	2.21	2.63	0.66	2.71	−4.66	5.97	1.11
Vigorous activity (min)	−0.61	0.89	−2.37	1.14	20.83	0.57	2.05	−3.44	4.58	22.34
Very vigorous activity (min)	−0.11	0.25	−0.60	0.38	29.38	0.07	0.16	−0.24	0.38	35.18
Sedentary activity (min)	3.30	3.32	−3.21	9.81	0.52	−2.96	2.65	−8.16	2.23	0.45