Accelerometry outcomes from a four-year community-based systems approach to childhood obesity prevention
Oral Presentation A10.1
DOI:
https://doi.org/10.14288/hfjc.v14i3.413Keywords:
Systems Approaches, Physical Activity, ChildrenAbstract
Background: Whole of Systems Trial of Prevention Strategies for Childhood Obesity (WHOSTOPS) was one of the first whole-of-community systems-based interventions designed to prevent childhood obesity. Purpose: We present objectively measured physical activity and sedentary time results from this four-year cluster-randomised controlled trial among children in grades four (approximately 9-10 years old) and six (approximately 11-12 years old). Methods: Ten communities were randomly allocated (1:1) to the WHOSTOPS intervention. A repeat cross-sectional design was used to collect data from children in 2015 (baseline), 2017, and 2019. Children wore hip-mounted ActiGraph (wGT3x-BT) accelerometer for 7 days. Freedson-Trost age-specific activity counts per minute (Axis 1) were converted into minutes.day-1 spent engaged in moderate-to-vigorous physical activity (MVPA), light physical activity (LPA), and sedentary time (ST). Linear mixed models were fitted to estimate the effects of the intervention on the three activity outcomes. Results: Data from 1,406 children (intervention n=745; control n=661) were included in the analyses. No significant intervention effects were observed for MVPA, LPA, or ST. There were positive, but non-significant, changes in mean MVPA between 2015-2017 favouring intervention boys (3.7mins/day; 95% confidence interval [CI]: -5.7, 13.1) and girls (5.5mins/day; 95% CI: -1.5, 12.6) which had decreased by 2019. Conclusions: WHOSTOPS did not significantly alter activity levels. Community initiatives – such as active transport drop-off zones and bike buses – may have contributed to the potentially meaningful increases MVPA, highlighting the necessity for further research. Funding: Australian National Health and Medical Research Council, Western Alliance, Australian National Heart Foundation.
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Copyright (c) 2021 Claudia Strugnell, Nicholas Crooks, Cadeyrn Gaskin, Denise Becker, Liliana Orellana, Kristy Bolton, Penny Fraser, Andrew Brown, Ha Le, Colin Bell, Steven Allender
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