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Neighbourhood physical activity environments and adiposity in children and mothers : a three-year longitudinal study

Timperio, Anna, Jeffery, Robert W., Crawford, David, Roberts, Rebecca, Giles-Corti, Billie and Ball, Kylie 2010, Neighbourhood physical activity environments and adiposity in children and mothers : a three-year longitudinal study, International journal of behavioral nutrition and physical activity, vol. 7, no. 18, pp. 1-8.

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Title Neighbourhood physical activity environments and adiposity in children and mothers : a three-year longitudinal study
Author(s) Timperio, Anna
Jeffery, Robert W.
Crawford, David
Roberts, Rebecca
Giles-Corti, Billie
Ball, Kylie
Journal name International journal of behavioral nutrition and physical activity
Volume number 7
Issue number 18
Start page 1
End page 8
Publisher BioMed Central Ltd.
Place of publication London, England
Publication date 2010-02-19
ISSN 1479-5868
Summary Background Although neighbourhood environments are often blamed for contributing to rising levels of obesity, current evidence is based predominantly on cross-sectional samples. This study examined associations between objectively-measured environmental characteristics of neighbourhoods and adiposity cross-sectionally and longitudinally over three years in children and their female carers.

Methods Longitudinal study of 140 5-6 year-old and 269 10-12 year-old children and their female carers (n = 369). At baseline (2001) and follow-up (2004), height and weight were measured among children and self-reported among female carers, and were used to compute BMI z-scores and BMI, respectively. A Geographic Information System determined access to destinations (public open spaces, sports options, walking/cycling tracks), road connectivity (density of cul-de-sacs and intersections, proportion of 4-way intersections, length of 'access' paths (overpasses, access lanes, throughways between buildings)) and traffic exposure (length of 'busy' and 'local' roads) within 800 m and 2 km of home. Univariate and multivariable linear regression analyses examined associations between environmental characteristics and BMI/BMI z-scores at baseline and change in BMI/BMI z-scores over the three years.

Results
Cross-sectionally, BMI z-score was inversely associated with length (km) of access paths within 800 m (b = -0.50) and 2 km (b = -0.16) among younger and number of sport/recreation public open spaces (b = -0.14) and length (km) of 'access' paths (b = -0.94) within 800 m and length of local roads within 2 km (b = -0.01) among older children. Among female carers, BMI was associated with length (km) of walking/cycling tracks (b = 0.17) and busy roads (b = -0.34) within 800 m. Longitudinally, the proportion of intersections that were 4-way (b = -0.01) within 800 m of home was negatively associated with change in BMI z-score among younger children, while length (km) of access paths (b = 0.18) within 800 m was significant among older children. Among female carers, options for aerobics/fitness and swimming within 2 km were associated with change in BMI (B = -0.42).

Conclusion
A small number of neighbourhood environment features were associated with adiposity outcomes. These differed by age group and neighbourhood scale (800 m and 2 km) and were inconsistent between cross-sectional and longitudinal findings. However, the results suggest that improvements to road connectivity and slowing traffic and provision of facilities for leisure activities popular among women may support obesity prevention efforts.
Notes This is an open access article distributed under the terms of the attached BioMed Central License. See attached license for details.
Language eng
Field of Research 111706 Epidemiology
Socio Economic Objective 920412 Preventive Medicine
HERDC Research category C1 Refereed article in a scholarly journal
Copyright notice ©2010, The Authors
Persistent URL http://hdl.handle.net/10536/DRO/DU:30031298

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Every reasonable effort has been made to ensure that permission has been obtained for items included in DRO. If you believe that your rights have been infringed by this repository, please contact drosupport@deakin.edu.au.