Validation of Oura ring energy expenditure and steps in laboratory and free-living

Kristiansson, Emilia; Fridolfsson, Jonatan; Arvidsson, Daniel; Holmäng, Agneta; Börjesson, Mats; Andersson-Hall, Ulrika

doi:10.1186/s12874-023-01868-x

BMC Medical Research Methodology

Table 2 Mean output (±SD), mean individual correlation (±SD), mean bias (±SD), 95% limits of agreement, and measurement error (MAPE) between Oura and IC energy expenditure (MET) in laboratory setting overall and activity-by-activity, and between Oura- and accelerometer-derived EE metrics, and Oura- and pedometer-derived step metrics in the free-living setting

From: Validation of Oura ring energy expenditure and steps in laboratory and free-living

			MET output		Correlation r		Bias					Error
Activity	Sensor	n	Mean	±SD	Mean	±SD	Mean	±SD	p	95% Limits of Agreement		MAPE
Activity	Sensor	n	Mean	±SD	Mean	±SD	Mean	±SD	p	Upper	Lower	MAPE
Laboratory
Combined activities	Oura	183	5.0	4.4	0.93	0.14	−0.4	2.25	0.02	4.03	−4.79	21.1%
Combined activities	IC	183	5.4	4.8	0.93	0.14	−0.4	2.25	0.02	4.03	−4.79	21.1%
1.Sitting	Oura	28	1.13	0.13			−0.12	0.28	0.04	0.44	−0.67	6.6%
1.Sitting	IC	28	1.25	0.26			−0.12	0.28	0.04	0.44	−0.67	6.6%
2.Standing	Oura	28	1.06	0.35			−0.27	0.33	< 0.001	0.374	−0.921	16.3%
2.Standing	IC	28	1.34	0.20			−0.27	0.33	< 0.001	0.374	−0.921	16.3%
3.Books	Oura	28	2.30	0.88			0.11	0.85	0.48	1.78	−1.56	24.1%
3.Books	IC	28	2.18	0.41			0.11	0.85	0.48	1.78	−1.56	24.1%
4.Walk – slow	Oura	28	4.38	0.73			0.18	0.97	0.35	2.07	−1.72	18.8%
4.Walk – slow	IC	28	4.20	0.82			0.18	0.97	0.35	2.07	−1.72	18.8%
4.Walk – fast	Oura	28	5.41	1.38			−0.82	1.92	0.03	2.93	−4.57	19.3%
4.Walk – fast	IC	28	6.23	1.46			−0.82	1.92	0.03	2.93	−4.57	19.3%
5.Run – slow	Oura	26	10.48	3.49			−0.17	3.81	0.83	7.29	−7.62	29.9%
5.Run – slow	IC	26	10.65	1.83			−0.17	3.81	0.83	7.29	−7.62	29.9%
5.Run – fast	Oura	10	12.49	3.19			−1.11	4.35	0.44	7.42	−9.65	25.7%
5.Run – fast	IC	10	13.60	2.76			−1.11	4.35	0.44	7.42	−9.65	25.7%
5.Run – very fast	Oura	9	13.70	2.69			−3.49	3.94	0.03	4.23	−11.21	20.7%
5.Run – very fast	IC	9	17.19	3.27			−3.49	3.94	0.03	4.23	−11.21	20.7%
Free-Living
MET	Oura	389	1.66	0.35
	Hip	389	1.42	0.32	0.79	0.29	0.24	0.16	< 0.001	0.55	−0.07	18.2%
	Thigh	393	1.40	0.33	0.81	0.19	0.26	0.16	< 0.001	0.57	−0.06	20.2%
	Wrist	388	1.99	0.39	0.80	0.24	−0.34	0.19	< 0.001	0.03	−0.71	17.2%
TEE (Kcal)	Oura	389	2883	637
	Hip	389	2087	595	0.79	0.25	796	362	< 0.001	1506	85	42.2%
	Thigh	393	2066	621	0.78	0.23	817	375	< 0.001	1551	82	44.7%
	Wrist	388	2932	794	0.76	0.26	− 54	494	0.03	913	− 1022	13.0%
AEE (Kcal)	Oura	389	760	554
	Hip	389	523	422	0.81	0.26	238	262	< 0.001	751	− 276	68.1%
	Thigh	393	500	451	0.81	0.20	259	263	< 0.001	774	− 255	89.5%
	Wrist	388	1241	562	0.79	0.24	−487	346	< 0.001	192	− 1166	46.2%
Steps	Oura	389	13,446	7374
Steps	Pedometer	389	11,322	7779	0.77	0.29	2124	4256	< 0.001	10,466	− 6217	50.3%

Significance determined with paired t-test
AEE Active Energy Expenditure, IC Indirect Calorimetry, Kcal Kilocalories, MAPE Mean Absolute Percentage Error, MET Metabolic Equivalent of Task, TEE Total Energy Expenditure

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ISSN: 1471-2288

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