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Comparing Self-Monitoring Strategies for Weight Loss in a Smartphone App: Randomized Controlled Trial.

Publication ,  Journal Article
Patel, ML; Hopkins, CM; Brooks, TL; Bennett, GG
Published in: JMIR mHealth and uHealth
February 2019

Self-monitoring of dietary intake is a valuable component of behavioral weight loss treatment; however, it declines quickly, thereby resulting in suboptimal treatment outcomes.This study aimed to examine a novel behavioral weight loss intervention that aims to attenuate the decline in dietary self-monitoring engagement.GoalTracker was an automated randomized controlled trial. Participants were adults with overweight or obesity (n=105; aged 21-65 years; body mass index, BMI, 25-45 kg/m2) and were randomized to a 12-week stand-alone weight loss intervention using the MyFitnessPal smartphone app for daily self-monitoring of either (1) both weight and diet, with weekly lessons, action plans, and feedback (Simultaneous); (2) weight through week 4, then added diet, with the same behavioral components (Sequential); or (3) only diet (App-Only). All groups received a goal to lose 5% of initial weight by 12 weeks, a tailored calorie goal, and automated in-app reminders. Participants were recruited via online and offline methods. Weight was collected in-person at baseline, 1 month, and 3 months using calibrated scales and via self-report at 6 months. We retrieved objective self-monitoring engagement data from MyFitnessPal using an application programming interface. Engagement was defined as the number of days per week in which tracking occurred, with diet entries counted if ≥800 kcal per day. Other assessment data were collected in-person via online self-report questionnaires.At baseline, participants (84/100 female) had a mean age (SD) of 42.7 (11.7) years and a BMI of 31.9 (SD 4.5) kg/m2. One-third (33/100) were from racial or ethnic minority groups. During the trial, 5 participants became ineligible. Of the remaining 100 participants, 84% (84/100) and 76% (76/100) completed the 1-month and 3-month visits, respectively. In intent-to-treat analyses, there was no difference in weight change at 3 months between the Sequential arm (mean -2.7 kg, 95% CI -3.9 to -1.5) and either the App-Only arm (-2.4 kg, -3.7 to -1.2; P=.78) or the Simultaneous arm (-2.8 kg, -4.0 to -1.5; P=.72). The median number of days of self-monitoring diet per week was 1.9 (interquartile range [IQR] 0.3-5.5) in Sequential (once began), 5.3 (IQR 1.8-6.7) in Simultaneous, and 2.9 (IQR 1.2-5.2) in App-Only. Weight was tracked 4.8 (IQR 1.9-6.3) days per week in Sequential and 5.1 (IQR 1.8-6.3) days per week in Simultaneous. Engagement in neither diet nor weight tracking differed between arms.Regardless of the order in which diet is tracked, using tailored goals and a commercial mobile app can produce clinically significant weight loss. Stand-alone digital health treatments may be a viable option for those looking for a lower intensity approach.ClinicalTrials.gov NCT03254953; https://clinicaltrials.gov/ct2/show/NCT03254953 (Archived by WebCite at http://www.webcitation.org/72PyQrFjn).

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Published In

JMIR mHealth and uHealth

DOI

EISSN

2291-5222

ISSN

2291-5222

Publication Date

February 2019

Volume

7

Issue

2

Start / End Page

e12209

Related Subject Headings

  • Weight Loss
  • Self-Management
  • North Carolina
  • Mobile Applications
  • Middle Aged
  • Male
  • Humans
  • Female
  • Feeding Behavior
  • Aged
 

Citation

APA
Chicago
ICMJE
MLA
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Patel, M. L., Hopkins, C. M., Brooks, T. L., & Bennett, G. G. (2019). Comparing Self-Monitoring Strategies for Weight Loss in a Smartphone App: Randomized Controlled Trial. JMIR MHealth and UHealth, 7(2), e12209. https://doi.org/10.2196/12209
Patel, Michele L., Christina M. Hopkins, Taylor L. Brooks, and Gary G. Bennett. “Comparing Self-Monitoring Strategies for Weight Loss in a Smartphone App: Randomized Controlled Trial.JMIR MHealth and UHealth 7, no. 2 (February 2019): e12209. https://doi.org/10.2196/12209.
Patel ML, Hopkins CM, Brooks TL, Bennett GG. Comparing Self-Monitoring Strategies for Weight Loss in a Smartphone App: Randomized Controlled Trial. JMIR mHealth and uHealth. 2019 Feb;7(2):e12209.
Patel, Michele L., et al. “Comparing Self-Monitoring Strategies for Weight Loss in a Smartphone App: Randomized Controlled Trial.JMIR MHealth and UHealth, vol. 7, no. 2, Feb. 2019, p. e12209. Epmc, doi:10.2196/12209.
Patel ML, Hopkins CM, Brooks TL, Bennett GG. Comparing Self-Monitoring Strategies for Weight Loss in a Smartphone App: Randomized Controlled Trial. JMIR mHealth and uHealth. 2019 Feb;7(2):e12209.

Published In

JMIR mHealth and uHealth

DOI

EISSN

2291-5222

ISSN

2291-5222

Publication Date

February 2019

Volume

7

Issue

2

Start / End Page

e12209

Related Subject Headings

  • Weight Loss
  • Self-Management
  • North Carolina
  • Mobile Applications
  • Middle Aged
  • Male
  • Humans
  • Female
  • Feeding Behavior
  • Aged