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BMC Public Health
Published in: BMC Public Health 1/2012

Open Access 01-12-2012 | Study protocol

A smartphone-supported weight loss program: design of the ENGAGED randomized controlled trial

Authors: Christine A Pellegrini, Jennifer M Duncan, Arlen C Moller, Joanna Buscemi, Alyson Sularz, Andrew DeMott, Alex Pictor, Sherry Pagoto, Juned Siddique, Bonnie Spring

Published in: BMC Public Health | Issue 1/2012

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Abstract

Background

Obesity remains a major public health challenge, demanding cost-effective and scalable weight management programs. Delivering key treatment components via mobile technology offers a potential way to reduce expensive in-person contact, thereby lowering the cost and burden of intensive weight loss programs. The ENGAGED study is a theory-guided, randomized controlled trial designed to examine the feasibility and efficacy of an abbreviated smartphone-supported weight loss program.

Methods/design

Ninety-six obese adults (BMI 30–39.9 kg/m2) will be randomized to one of three treatment conditions: (1) standard behavioral weight loss (STND), (2) technology-supported behavioral weight loss (TECH); or (3) self-guided behavioral weight loss (SELF). All groups will aim to achieve a 7% weight loss goal by reducing calorie and fat intake and progressively increasing moderate intensity physical activity to 175 minutes/week. STND and TECH will attend 8 group sessions and receive regular coaching calls during the first 6 months of the intervention; SELF will receive the Group Lifestyle Balance Program DVD’s and will not receive coaching calls. During months 1–6, TECH will use a specially designed smartphone application to monitor dietary intake, body weight, and objectively measured physical activity (obtained from a Blue-tooth enabled accelerometer). STND and SELF will self-monitor on paper diaries. Linear mixed modeling will be used to examine group differences on weight loss at months 3, 6, and 12. Self-monitoring adherence and diet and activity goal attainment will be tested as mediators.

Discussion

ENGAGED is an innovative weight loss intervention that integrates theory with emerging mobile technologies. We hypothesize that TECH, as compared to STND and SELF, will result in greater weight loss by virtue of improved behavioral adherence and goal achievement.

Trial registration

NCT01051713
Appendix
Available only for authorised users
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Metadata
Title
A smartphone-supported weight loss program: design of the ENGAGED randomized controlled trial
Authors
Christine A Pellegrini
Jennifer M Duncan
Arlen C Moller
Joanna Buscemi
Alyson Sularz
Andrew DeMott
Alex Pictor
Sherry Pagoto
Juned Siddique
Bonnie Spring
Publication date
01-12-2012
Publisher
BioMed Central
Published in
BMC Public Health / Issue 1/2012
Electronic ISSN: 1471-2458
DOI
https://doi.org/10.1186/1471-2458-12-1041

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