Prestwich, A, Conner, MT, Lawton, RJ et al. (3 more authors) (2014) Partner- and planning-based interventions to reduce fat consumption: randomized controlled trial. British Journal of Health Psychology, 19 (1). pp. 132-148. ISSN 1359-107X
Abstract
OBJECTIVE: The research tested the efficacy of partner- and planning-based interventions to reduce dietary fat intake over a 6-month period. DESIGN: Randomized controlled, blinded, parallel trial. METHODS: A computer randomization feature was used to allocate council employees (N = 427, of which 393 completed baseline measures) to one of four conditions (partner + implementation intentions, partner-only, implementation intentions, and control group) before they completed measures at baseline and follow-ups at 1, 3, and 6 months post-baseline. Outcome measures were comprised of validated self-report measures of dietary fat intake (saturated fat intake, fat intake, ratio of 'good' fats to 'bad' fats); psychosocial mediators (enjoyment, intention, self-efficacy, social influence, partner support); weight and waist size (baseline and 6 months only). RESULTS: Data from 393 participants were analysed in accordance with intention-to-treat analyses. All intervention groups reported greater reductions in fat intake than the control group at 3 months. The partner-based groups increased the ratio of 'good' fats to 'bad' fats at 3 and 6 months and lost more inches on their waist, versus the non-partner groups. The impacts of the partner-based manipulations on outcomes were partially mediated by greater perceived social influences, partner support, and enjoyment of avoiding high-fat foods. The partner-based interventions also increased intention and self-efficacy. However, the effects in this study were typically small and generally marginally significant. CONCLUSIONS: Partner-based interventions had some positive benefits on dietary-related outcomes at 3 and 6 months. Support for implementation intentions was more limited.
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Copyright, Publisher and Additional Information: | © 2013 The British Psychological Society. Uploaded in accordance with the publisher's self-archiving policy. This is the accepted version of the following article: Prestwich, A., Conner, M.T., Lawton, R.J., Ward, J.K., Ayres, K., & McEachan, R.R.C. (2014). Partner and planning-based interventions to reduce fat consumption: Randomized controlled trial. British Journal of Health Psychology, 19(1), 132-148, which has been published in final form at http://onlinelibrary.wiley.com/doi/10.1111/bjhp.12047/abstract. This article may be used for non-commercial purposes in accordance with the Wiley Self-Archiving Policy http://olabout.wiley.com/WileyCDA/Section/id-820227.html | ||||
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Institution: | The University of Leeds | ||||
Academic Units: | The University of Leeds > Faculty of Medicine and Health (Leeds) > School of Psychology (Leeds) | ||||
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Depositing User: | Symplectic Publications | ||||
Date Deposited: | 13 Apr 2016 14:55 | ||||
Last Modified: | 18 Jan 2018 16:59 | ||||
Published Version: | http://dx.doi.org/10.1111/bjhp.12047 | ||||
Status: | Published | ||||
Publisher: | Wiley | ||||
Identification Number: | https://doi.org/10.1111/bjhp.12047 | ||||
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