Self-monitoring as a mediator of weight loss in the SMART randomized clinical trial.
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Date
2013-11-25
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Abstract
BACKGROUND Integral components of behavioral weight loss treatment include self monitoring of diet and physical activity along with feedback to participants regarding their behaviors While providing feedback has been associated with weight loss no studies have examined the impact of feedback frequency on weight loss or the mediating role of self monitoring adherence in this relationship PURPOSE This study examined the effect of participant feedback frequency on weight loss and determined if this effect was mediated by adherence to self monitoring in a behavioral weight loss trial conducted in the USA METHOD Participants N 210 were randomly assigned to one of three self monitoring methods with either no daily feedback messages or daily feedback messages 1 paper diary PD no daily feedback 2 personal digital assistant PDA no daily feedback and 3 PDA daily tailored feedback messages PDA FB The Sobel test via bootstrapping examined the direct effect of feedback frequency on weight loss and the indirect effect through self monitoring adherence RESULTS Receiving daily feedback messages significantly increased participants self monitoring adherence A significant effect of feedback frequency on weight loss was noted however after adjusting for self monitoring adherence the effect of feedback frequency on weight loss was no longer significant Feedback frequency had a significant indirect effect on weight loss through self monitoring adherence CONCLUSION Self monitoring adherence mediated the effect of feedback frequency on weight loss Increasing the frequency with which participants receive feedback could enhance self monitoring adherence a critical component of behavioral weight loss treatment
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Keywords
Client, Access to information or data, Supply of services, Nutrition, Obesity, Social and behavior change communication, Health education or promotion, Disease prevention