Wear compliance, sedentary behaviour and activity in freeliving children from hip-and wrist-mounted ActiGraph GT3X+ accelerometer
Citation
McLellan, G., Buchan, D. and Arthur, R. (2018) 'Wear compliance, sedentary behaviour and activity in freeliving children from hip-and wrist-mounted ActiGraph GT3X+ accelerometers' (from 7th International Society for Physical Activity and Health Congress, London, 15-17 October), Journal of Physical Activity and Health. 15(s1), pp. S218-219.
Abstract
This study examined the compliance of children wearing wrist- and hipmounted ActiGraph GT3X+ accelerometers and compared estimates of
sedentary behaviour (SB) and physical activity (PA). One hundred and eighty-eight 9-12-year-old children wore a wrist- and
hip-mounted accelerometer for 7 days. Data were available for 160 (hip)
and 161 (wrist) participants. Compliance was analysed using 9 different
wear-time criteria. Output comparisons were compared against one weartime criteria (any 4 days at 10-hours per day). Time spent in SB and PA was
calculated using R-package GGIR.
Wear-time for the wrist (15.6 to 17.4 h.d−1
) was significantly greater than
the hip (15.2 to 16.8 h.d−1
) across all wear-time criteria (all P < 0.05).
Moderate-strong associations were found between time spent in SB (r =
0.39), LPA (r = 0.33), MPA (r = 0.99), VPA (r = 0.82) and MVPA (r =
0.81) between the two device placements (All P < 0.001). The wrist device
detected more minutes in LPA, MPA, VPA and MVPA whereas the hip
detected more minutes in SB (all P = 0.001). Estimates of time in SB and all
activity outcomes from the wrist and hip lacked equivalence.
The GT3X+ when worn at the wrist promotes greater compliance than at
the hip. Minutes in SB and PA calculated from raw accelerations at the hip
and wrist provide contrasting estimates and cannot be directly compared.
Further calibration and correction factors may facilitate the comparison of
findings in studies that estimate time spent in SB and PA intensities
captured from the wrist and hip.