Theory-based digital intervention to promote weight loss and weight loss maintenance (Choosing Health) : protocol for a randomised controlled trial
Kwasnicka, D., Luszczynska, A., Hagger, M. S., Quested, E., Pagoto, S. L., Verboon, P., Robinson, S., Januszewicz, A., Idziak, P., Palacz, I., & Naughton, F. (2020). Theory-based digital intervention to promote weight loss and weight loss maintenance (Choosing Health) : protocol for a randomised controlled trial. BMJ Open, 10(11), Article e040183. https://doi.org/10.1136/bmjopen-2020-040183
Published inBMJ Open
© Authors, 2020
Introduction: Digital behavioural weight loss interventions have the potential to improve public health; however, these interventions are often not adequately tailored to the needs of the participants. This is the protocol for a trial that aims to determine the effectiveness and cost-effectiveness of the Choosing Health programme as a means to promote weight loss and weight loss maintenance among overweight/obese adults. Methods and analysis: The proposed study is a two-group randomised controlled trial with a nested interrupted time series (ITS) within-person design. Participants (n=285) will be randomly assigned to either the Choosing Health digital intervention or a control group. For intervention participants, ecological momentary assessment will be used to identify behavioural determinants for each individual in order to tailor evidence-based behaviour change techniques and intervention content. Control group participants will receive non-tailored weight loss advice via e-book and generic emails. The primary outcome is the mean difference in weight loss between groups at 6 months controlled for baseline. Secondary outcomes include blood pressure and percentage of body fat; self-reported measures of physical activity, sitting time, quality of life, cost and theory-derived correlates of weight loss. Secondary outcomes will be measured at baseline, 3, 6 and 12 months. The primary outcome for ITS will be daily weight loss plan adherence. Data will be analysed using regression and time series analyses. Ethics and dissemination: Ethics approval was granted by Faculty of Psychology, SWPS University of Social Sciences and Humanities, Wroclaw, Poland, approval number 03/P/12/2019. The project results will be disseminated through structured strategy implemented in collaboration with the Ministry of Health. ...
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Additional information about fundingThe Choosing Health project is carried out within the HOMING programme of the Foundation for Polish Science co-financed by the European Union under the European Regional Development Fund; grant number POIR.04.04.00-00-5CF3/18-00; HOMING 5/2018.
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