. 2017 Sep 22;8:725. doi: 10.3389/fphys.2017.00725

Table 1.

Mean absolute percentage error (MAPE), Intraclass Correlation Coefficient (ICC; 95%CI), typical error (TE), and upper & lower limits of agreement (LoA) for all Wearables for step count.

		Bodymedia Sensewear		Polar Loop		Beurer AS80		Garmin Vivofit		Garmin Vivosmart		Garmin Vivoactive		Garmin Forerunner 920XT		Fitbit Charge		Fitbit Charge HR		Withings Pulse O_x Hip		Withings Pulse O_x Wrist
4.3 km·h⁻¹	MAPE	−15.5		−8.7		−6.1		−0.7		−0.3		0.1		1.5		−3.2		−0.6		−0.2		−0.9
	ICC (95% CI)	0.18 (−0.08–0.53)		0.06 (−0.19–0.40)		0.20 (−0.17–0.55)		0.89 (0.74–0.95)		0.97 (0.92–0.99)		0.94 (0.85–0.97)		0.72 (0.19–0.93)		0.57 (0.14–0.81)		0.96 (0.89–0.98)		0.98 (0.94–1.0)		0.82 (0.60–0.92)
	TE	37.1		58.2		54.6		5.3		1.4		2.4		16.9		17.0		1.6		0.7		8.1
	LoA	−3	−163	69	−165	87	−153	28	−36	14	−18	21	−20	71	−54	34	−69	12	−19	9	−12	32	−42
7.2 km·h⁻¹	MAPE	−12.8		−9.6		−0.1		0.2		0.3		0.1		0.3		−1.1		0.5		−0.003		−0.4
	ICC (95% CI)	0.18 (−0.09−0.53)		−0.27 (−0.55−0.16)		0.99 (0.98−1.0)		0.99 (0.97−1.0)		0.98 (0.96−1.0)		0.94 (0.85−0.98)		0.98 (0.94−1.0)		0.83 (0.62−0.93)		0.97 (0.91−0.99)		0.59 (0.03−0.88)		0.99 (0.99−1.0)
	TE	48.5		110.2		0.4		0.6		0.9		3.6		1.0		10.6		1.6		1.6		0.6
	LoA	4	−210	174	−332	7	−9	13	−9	16	−11	30	−28	17	−11	42	−58	22	−14	5	−5	8	−15
10.1 km·h⁻¹	MAPE	−12.5		−5.4		−2.5		0.7		−0.2		0.6		0.04		−1.3		0.01		−0.2		−1.9
	ICC (95% CI)	0.27 (−0.08−0.65)		0.39 (−0.08−0.72)		0.72 (0.34−0.89)		0.91 (0.78−0.96)		0.97 (0.93−0.99)		0.97 (0.93−0.99)		0.99 (0.96−1.0)		0.85 (0.66−0.94)		0.99 (0.98−1.0)		0.99 (0.98−1.0)		0.83 (0.51−0.94)
	TE	41.2		34.5		17.9		6.8		2.2		2.0		0.9		10.8		0.7		0.7		9.6
	LoA	−8	−197	41	−133	45	−88	50	−39	23	−27	27	−17	17	−17	43	−66	14	−13	11	−15	30	−62
13.0 km·h⁻¹	MAPE	−13.5		−3.3		−3.7		−2.0		−0.4		−0.2		0.1		−1.9		−0.3		−0.6		−4.8
	ICC (95% CI)	0.23 (−0.08−0.60)		0.69 (0.26−0.88)		0.49 (0.07−0.76)		0.73 (0.43−0.88)		0.97 (0.93−0.99)		0.99 (0.98−1.00)		0.99 (0.97−1.00)		0.78 (0.49−0.91)		0.99 (0.98−1.00)		0.96 (0.86−0.99)		0.25 (−0.11−0.59)
	TE	47.2		23.0		37.3		24.4		2.3		0.8		0.8		15.2		0.7		3.2		53.0
	LoA	−12	−223	52	−110	69	−135	75	−109	23	−30	15	−17	17	−15	46	−81	11	−16	25	−37	76	−164
Inter−mittent	MAPE	−9.9		−13.3		−16.2		−1.4		−1.1		−1.5		−2.7		−3.3		−1.1		−4.7		−16.0
	ICC (95% CI)	0.62 (−0.06−0.90)		0.31 (0.09−0.70)		0.37 (−0.11−0.72)		0.88 (0.71−0.95)		0.95 (0.87−0.98)		0.89 (0.74−0.96)		0.93 (0.72−0.98)		0.88 (0.43−0.96)		0.93 (0.84−0.97)		0.91 (−0.02−0.99)		0.34 (−0.08−0.73)
	TE	29.7		73.9		119.5		17.9		9.0		16.8		13.8		16.0		11.5		7.0		74.0
	LoA	−28	−127	7	−342	99	−491	80	−123	64	−93	78	−121	69	−136	48	−133	71	−100	−15	−106	−20	−377
Outdoor	MAPE	−3.0		−1.9		−4.7		−0.02		−0.04		−0.1		0.03		−0.1		0.2		0.1		−0.6
	ICC (95% CI)	0.82 (0.07−0.96)		0.83 (0.32−0.96)		0.50 (−0.06−0.84)		0.98 (0.93−1.0)		0.98 (0.92−1.0)		0.98 (0.92−1.0)		0.98 (0.93−1.0)		0.98 (0.91−0.99)		0.98 (0.92−0.99)		0.98 (0.92−1.0)		0.98 (0.91−1.0)
	TE	27.1		24.5		127.2		4.3		4.5		4.6		4.3		4.8		4.6		4.3		3.8
	LoA	51	−199	72	−161	237	−468	60	−60	63	−60	63	−65	61	−58	65	−67	70	−58	64	−56	38	−68