Socioeconomic and ethnic differences in children's vigorous intensity physical activity: a cross-sectional analysis of the UK Millennium Cohort Study.
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Love, R., Adams, J., Atkin, A., & Van Sluijs, E. (2019). Socioeconomic and ethnic differences in children's vigorous intensity physical activity: a cross-sectional analysis of the UK Millennium Cohort Study.. BMJ open, 9 (5), e027627. https://doi.org/10.1136/bmjopen-2018-027627
ABSTRACT Objective: To investigate if daily vigorous physical activity, adjusted for minutes of moderate physical activity performed, differs by socio-economic position or ethnicity in a large sample of UK children with objectively measured physical activity. Design: Nationally representative prospective cohort study. Setting: UK children born between 2000 and 2002. Participants: 5172 7-8-year-old children with valid accelerometer data for ≥10 h on ≥3 days, including one weekend day. Main outcome measures: Time spent in vigorous physical activity (VPA) (>3841 counts per minute). Explanatory measures: Maternal education, annual household OECD equivalised income, ethnicity. Results: Multivariable linear regression models fitted to explore differences in average daily minutes of VPA (adjusted for moderate physical activity (MPA), mean accelerometer wear time, season of measurement, age and sex), revealed significantly higher amounts of VPA accumulated as a child’s socioeconomic position increased (highest versus lowest level of maternal education: β: 2.96, p: 0.00; annual household equivalised income: β: 0.58, p: 0.00, per £10,000 annual increase). Additionally, children from certain minority ethnicities (Bangladeshi and Pakistani: β: -3.34, p: 0.00; Other ethnic groups: β:-2.27, p: 0.02) accrued less daily VPA compared with their white British counterparts. Conclusions: The socioeconomic and ethnic patterning of vigorous activity observed in this study mirrors parallel inequalities in rates of childhood obesity. Given the stronger association of vigorous activity (VPA) with adiposity than of moderate activity (MPA), intensity specific differences may be contributing to widening inequalities in obesity. Accordingly, these findings suggest that the current global focus on overall MVPA may mask important behavioural inequalities.
Funding for this study and the work of all authors was supported, wholly or in part, by the Centre for Diet and Activity Research (CEDAR), a UKCRC Public Health Research Centre of Excellence (087636/Z/08/Z; ES/G007462/1; MR/K023187/1). Funding from the British Heart Foundation, Department of Health, Economic and Social Research Council, Medical Research Council, and the Wellcome Trust, under the auspices of the UK Clinical Research Collaboration, is gratefully acknowledged. Rebecca Love is funded by a Gates Cambridge Scholarship. The work of Esther M F van Sluijs was supported by the Medical Research Council (MC_UU_12015/7). No funders were involved in the production of this manuscript.
Wellcome Trust (087636/Z/08/Z)
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External DOI: https://doi.org/10.1136/bmjopen-2018-027627
This record's URL: https://www.repository.cam.ac.uk/handle/1810/292035
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