Adaptive Goals and Interventions for Lifestyle Enhancement

Summary

Mobile obesity interventions have the potential to reach a diverse population in need; however, while effective, have not resulted in weight losses obtained in in-person interventions. Newer digital approaches called Just-in-Time Adaptive Interventions (JITAI) that offer adaptive, personalized feedback 'when needed' and in 'real time' offer an opportunity to use digital health tools "just in time". This study seeks to identify the optimal components of a comprehensive weight loss JITAI that results in weight losses that meet or exceed those in existing remotely delivered interventions.

Conditions

• Obesity

Interventions

BEHAVIORAL

Core

Behavioral weight loss core includes behavioral lessons, activity tracker, daily self-weighing, weekly tailored feedback summary.

BEHAVIORAL

Standard Diet Monitoring

Standard monitoring using smartphone tracking of all calorie intake.

BEHAVIORAL

Simplified Diet Monitoring

Simplified diet monitoring using smartphone tracking of red foods using a traffic light approach.

BEHAVIORAL

Adaptive Activity Goals (Daily)

Physical activity goals that adapt once each day using the participants' data derived from activity tracker.

BEHAVIORAL

Adaptive Activity Goals (Weekly)

Physical activity goals that adapt once each week using the participants' data derived from activity tracker.

BEHAVIORAL

Message Decision Points (Fixed)

Message timing is fixed and evaluated at specific times each day to determine message eligibility.

BEHAVIORAL

Message Decision Points (Adaptive)

Message timing is adaptive and derived from individual user data to determine message eligibility.

BEHAVIORAL

Message Decision Rules (Standard)

Decision rules to determine eligibility to receive just-in-time messages consider participant's recent behaviors.

BEHAVIORAL

Message Decision Rules (Adaptive)

Decision rules to determine eligibility to receive just-in-time messages consider participant's recent behaviors and overall progress.

BEHAVIORAL

Message Choice (No)

Participant choice does not drive adaptation of 1) message type delivered or 2) lapse support provision

BEHAVIORAL

Message Choice (Yes)

Participant choice drives adaptation of 1) message type delivered and 2) lapse support provision.

Sponsors & Collaborators

• National Institute of Diabetes and Digestive and Kidney Diseases (NIDDK)

  collaborator NIH

• University of North Carolina, Chapel Hill

  lead OTHER

Principal Investigators

• Deborah F. Tate, PhD · University of North Carolina, Chapel Hill

Study Design

Allocation

RANDOMIZED

Purpose

TREATMENT

Masking

DOUBLE

Model

FACTORIAL

Eligibility

Min Age

18 Years

Max Age

39 Years

Sex

ALL

Healthy Volunteers

No

Timeline & Regulatory

Start

2022-04-28

Primary Completion

2024-06-20

Completion

2024-07-01

Countries

• United States

Study Locations