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Preventing Childhood Obesity in Primary Schools: A Realist Review from UK Perspective

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  • Sharea Ijaz

    (The National Institute for Health Research, Applied Research Collaboration West (NIHR ARC West), University Hospitals Bristol and Weston NHS Foundation Trust, Bristol BS1 2NT, UK
    Bristol Medical School, University of Bristol, Bristol BS8 2PS, UK)

  • James Nobles

    (The National Institute for Health Research, Applied Research Collaboration West (NIHR ARC West), University Hospitals Bristol and Weston NHS Foundation Trust, Bristol BS1 2NT, UK
    Bristol Medical School, University of Bristol, Bristol BS8 2PS, UK)

  • Laura Johnson

    (Centre for Exercise, Nutrition and Health Sciences, School for Policy Studies, University of Bristol, Bristol BS8 1TZ, UK)

  • Theresa Moore

    (The National Institute for Health Research, Applied Research Collaboration West (NIHR ARC West), University Hospitals Bristol and Weston NHS Foundation Trust, Bristol BS1 2NT, UK
    Bristol Medical School, University of Bristol, Bristol BS8 2PS, UK
    Cochrane UK Methods Support Unit, Editorial & Methods Department, London SW1Y 4QX, UK)

  • Jelena Savović

    (The National Institute for Health Research, Applied Research Collaboration West (NIHR ARC West), University Hospitals Bristol and Weston NHS Foundation Trust, Bristol BS1 2NT, UK
    Bristol Medical School, University of Bristol, Bristol BS8 2PS, UK)

  • Russell Jago

    (The National Institute for Health Research, Applied Research Collaboration West (NIHR ARC West), University Hospitals Bristol and Weston NHS Foundation Trust, Bristol BS1 2NT, UK
    Centre for Exercise, Nutrition and Health Sciences, School for Policy Studies, University of Bristol, Bristol BS8 1TZ, UK)

Abstract

Childhood obesity is a global public health concern. While evidence from a recent comprehensive Cochrane review indicates school-based interventions can prevent obesity, we still do not know how or for whom these work best. We aimed to identify the contextual and mechanistic factors associated with obesity prevention interventions implementable in primary schools. A realist synthesis following the Realist And Meta-narrative Evidence Syntheses–Evolving Standards (RAMESES) guidance was with eligible studies from the 2019 Cochrane review on interventions in primary schools. The initial programme theory was developed through expert consensus and stakeholder input and refined with data from included studies to produce a final programme theory including all of the context-mechanism-outcome configurations. We included 24 studies (71 documents) in our synthesis. We found that baseline standardised body mass index (BMIz) affects intervention mechanisms variably as a contextual factor. Girls, older children and those with higher parental education consistently benefitted more from school-based interventions. The key mechanisms associated with beneficial effect were sufficient intervention dose, environmental modification and the intervention components working together as a whole. Education alone was not associated with favourable outcomes. Future interventions should go beyond education and incorporate a sufficient dose to trigger change in BMIz. Contextual factors deserve consideration when commissioning interventions to avoid widening health inequalities.

Suggested Citation

  • Sharea Ijaz & James Nobles & Laura Johnson & Theresa Moore & Jelena Savović & Russell Jago, 2021. "Preventing Childhood Obesity in Primary Schools: A Realist Review from UK Perspective," IJERPH, MDPI, vol. 18(24), pages 1-25, December.
  • Handle: RePEc:gam:jijerp:v:18:y:2021:i:24:p:13395-:d:706323
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    References listed on IDEAS

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    1. Liping Meng & Haiquan Xu & Ailing Liu & Joop van Raaij & Wanda Bemelmans & Xiaoqi Hu & Qian Zhang & Songming Du & Hongyun Fang & Jun Ma & Guifa Xu & Ying Li & Hongwei Guo & Lin Du & Guansheng Ma, 2013. "The Costs and Cost-Effectiveness of a School-Based Comprehensive Intervention Study on Childhood Obesity in China," PLOS ONE, Public Library of Science, vol. 8(10), pages 1-1, October.
    2. Rafaela Rosário & Bruno Oliveira & Ana Araújo & Oscar Lopes & Patrícia Padrão & André Moreira & Vítor Teixeira & Renata Barros & Beatriz Pereira & Pedro Moreira, 2012. "The Impact of an Intervention Taught by Trained Teachers on Childhood Overweight," IJERPH, MDPI, vol. 9(4), pages 1-13, April.
    3. Jean Adams & Oliver Mytton & Martin White & Pablo Monsivais, 2016. "Why Are Some Population Interventions for Diet and Obesity More Equitable and Effective Than Others? The Role of Individual Agency," PLOS Medicine, Public Library of Science, vol. 13(4), pages 1-7, April.
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