Table 2.

Mean difference between the use ratio (UR) derived from accelerometry data and the one derived from video analysis (ΔUR) for each group and each activity count (AC) threshold.

Epoch	AC	Adults		Children
		Mean ΔUR	95% CI	Mean ΔUR	95% CI
1	2	0.33	0.22–0.43	0.23	0.15–0.30
	25	0.20	0.12–0.28	0.08	0.02–0.13
	50	0.11	0.04–0.17	−0.05	−0.11–0.006
	75	0.06	0.004–0.11	−0.16	−0.21–(−0.10)
	100	0.02	−0.03–0.06	−0.24	−0.30–(−0.17)
	125	0.01	−0.03–0.05	−0.29	−0.36–(−0.22)
	150	0.02	−0.01–0.05	−0.33	−0.41–(−0.26)
1.5	2	0.34	0.24–0.44	0.24	0.16–0.31
	25	0.21	0.13–0.29	0.08	0.02–00.14
	50	0.11	0.06–0.18	−0.06	−0.11–0.0007
	75	0.05	−0.002–0.11	−0.17	−0.22–(−0.11)
	100	0.02	−0.03–0.07	−0.25	−0.32–(−0.19)
	125	0.02	−0.02–0.06	−0.31	−0.38–(−0.24)
	150	0.03	0.001–0.07	−0.36	−0.44–(−0.28)
2	2	0.37	0.26–0.48	0.28	0.20–0.36
	25	0.28	0.19–0.38	0.19	0.12–0.25
	50	0.21	0.13–0.29	0.09	0.03–0.15
	75	0.16	0.08–0.23	0.009	−0.05–0.096
	100	0.12	0.05–0.18	−0.07	−0.12–(−0.01)
	125	0.08	0.02–0.15	−0.13	−0.19–(−0.07)
	150	0.05	−0.01–0.11	−0.20	−0.27–(−0.13)

Legend: AC = activity count; UR = use ratio; the combination of factors for which the 95% confidence interval (CI) included 0, meaning that the UR derived from accelerometry data did not differ significantly from the one derived from video analysis, appears in bold.