Obesity Clinical Trial
Official title:
Precision Public Health: Enhancing Connections to Develop Just-in-Time Adaptive Intervention Strategies
The purpose of this pilot study is to examine the effects of different types of just-in-time intervention messages on daily meeting dietary, activity, and weighing goals in a sample of young adults participating in a mobile-based weight loss program.
Public health interventions typically rely on a set schedule of intervention delivery.
Advances in technology and computer tailoring allow us to go from a "one size fits all"
approach to one that uses digital health data to deliver "just-in-time adaptive
interventions," or JITAIs, that can vary the timing, dose, and content of intervention
messages to individuals. This pilot study is a micro-randomized trial that evaluates the
effects of various intervention message options delivered in JIT moments on meeting dietary,
activity, and weighing goals among young adults in a mobile-based weight loss program.
The Nudge study is a 12-week mobile health weight loss program delivered via a native
smartphone application. Individuals are asked to track their red foods (high-calorie,
high-fat foods) in the app daily and meet their personalized red foods goal, wear a Fitbit
daily and meet their daily active minutes goal, and weigh daily on their WiFi-enabled scale.
Up to 4 times each day, participants are randomized to receive or not receive intervention
messages in order to examine the effects of these intervention message types on meeting daily
weighing goals, red food goals, and activity goals. This is a within-subjects design in which
each participant serves as their own control, and data is analyzed at the person-day level.
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