Reliability and validity of two fitness tracker devices in the laboratory and home environment for older community-dwelling people

Table 6 Factors associated with fitness tracker steps and GENEactiv moderate-to-vigorous physical activity and sleep 14-day free-living data

		Correlation between Fitness Tracker Steps & GENEactiv Moderate-to-vigorous physical activity		Correlation between fitness tracker and GENEactiv Sleep
		Mean Correlation (SD)	p-value	Mean Correlation (SD)	p-value
Categorical Variables
Fitness tracker	Flex	0.68 (0.27)	0.674	0.47 (0.27)	0.220
	ChargeHR	0.72 (0.29)		0.30 (0.35)
Arm worn	Dominant	0.66 (0.32)	0.434	0.38 (0.35)	0.817
	Non-Dominant	0.75 (0.22)		0.35 (0.31)
Gender	Male	0.73 (0.19)	0.683	0.23 (0.33)	0.133
	Female	0.68 (0.33)		0.44 (0.31)
Age group	65–69	0.86 (0.12)	0.313	0.35 (0.36)	0.705
	70–79	0.66 (0.32)		0.41 (0.32)
	80–89	0.66 (0.24)		0.25 (0.36)
Living status	Alone	0.62 (0.35)	0.332	0.44 (0.18)	0.446
	With Spouse	0.74 (0.25)		0.33 (0.39)
Health Issues	No	0.76 (0.18)	0.540	0.31 (0.37)	0.634
	Yes	0.68 (0.30)		0.39 (0.32)
Prescribed Medications	No	0.75 (0.20)	0.703	0.41 (0.40)	0.728
	Yes	0.69 (0.30)		0.35 (0.32)
Fall in past year	No	0.75 (0.20)	0.040*	0.38 (0.35)	0.716
	Yes	0.49 (0.45)		0.32 (0.19)
Problems staying	No	0.70 (0.23)	0.937	0.48 (0.33)	0.081
asleep	Yes	0.70 (0.35)		0.24 (0..29)
Continuous Variables
		Correlation	p-value	Correlation	p-value
Age		−0.32	0.086	−0.004	0.984
Body Mass Index		0.15	0.279	−0.05	0.823
Distance walked in 2MWT(1)		0.12	0.520	−0.15	0.482
Distance walked in 2MWT(2)		0.17	0.368	−0.18	0.400
PASE (baseline)		0.29	0.148	−0.167	0.459
Post_PASE		.030	0.876	0.077	0.721

Note. 2MWT: two minute walk test, PASE: Physical Activity Scale for the Elderly. All 30 fitness tracker device data were utilised in the step data however only 10 Flex and 14 ChargeHR devices were utilised in the sleep analysis data. p-values for categorical variables from ANOVA or t-test comparing correlations between groups. *statistically significant at p-value <0.05

ISSN: 1471-2318