Optimization of Dietary Adherence in a Mobile Weight Loss Intervention

Summary

The goal of this study is to test multiple individual treatment components added to a 6-month standard mobile behavioral weight loss program that are intended to help participants follow dietary recommendations and meet their dietary goals more often. The four components to be studied include switching dietary tracking methods, receiving access to a goal planning tool, receiving additional personalized text messages, and receiving three sessions with a health coach. The study will identify the best combination of these additional treatments for improving total number of weeks in the program that participants meet their dietary goals.

Conditions

• Overweight and/or Obesity

Interventions

BEHAVIORAL

Coach Sessions

Receive 3 brief telephone or video coach sessions (20-30 minutes) every other week following randomization.

BEHAVIORAL

Core

Behavioral weight loss core includes daily self-monitoring (tracking) of dietary intake, physical activity, and weight; personalized daily goals for dietary intake and physical activity; weekly behavioral lessons in the study app; weekly tailored feedback on goal progress and weight change; 5-6 text messages per week.

BEHAVIORAL

Switch to Simplified Diet Monitoring

Switch from standard detailed calorie tracking to a simplified diet self-monitoring approach in which participants track red foods using a color-coded traffic light system.

BEHAVIORAL

Goal Autonomy/Planning

A weekly goal planning tool that allows participants to adjust their dietary goals and make a specific plan for the week.

BEHAVIORAL

Just-in-time (JIT) Messaging

Increased frequency of text messages (1-2 per day), highly personalized based on past and current dietary adherence and weight change.

Sponsors & Collaborators

• National Heart, Lung, and Blood Institute (NHLBI)

  collaborator NIH

• UNC Lineberger Comprehensive Cancer Center

  lead OTHER

Study Design

Allocation

RANDOMIZED

Purpose

TREATMENT

Masking

DOUBLE

Model

FACTORIAL

Eligibility

Min Age

18 Years

Sex

ALL

Healthy Volunteers

No

Timeline & Regulatory

Start

2027-03-31

Primary Completion

2029-09-30

Completion

2029-10-31

Countries

• United States

Study Locations