Just-in-time Adaptive Intervention Messaging in a Digital Weight Loss Intervention for Young Adults (Nudge)
Obesity, Overweight, Overweight and Obesity
About this trial
This is an interventional treatment trial for Obesity focused on measuring Mobile intervention, Diet, Physical Activity, Behavioral weight loss
Eligibility Criteria
Inclusion Criteria: Body mass index (BMI) of 25 - 45 kg/m^2 at baseline English-speaking, reading, and writing Own a smartphone with a data and text messaging plan Exclusion Criteria: Type 1 diabetes or currently receiving medical treatment for Type 2 diabetes Report a heart condition, chest pain during periods of activity or rest, or loss of consciousness on the Physical Activity Readiness Questionnaire (PAR-Q; items 1-4). Other health problems which may influence the ability to walk for physical activity or be associated with unintentional weight change, including cancer treatment within the past 5 years or tuberculosis Lost 10 lbs. or more of body weight (and kept it off) in the last 3 months Past diagnosis of or receiving treatment for a clinically diagnosed eating disorder (anorexia nervosa or bulimia nervosa) Current symptoms of alcohol or substance dependence Currently pregnant, pregnant within the past 6 months, or planning to become pregnant within the next 6 months Untreated thyroid disease or any changes (type or dose) in thyroid medication in last 6 months Hospitalization for depression or other psychiatric disorder within the past 12 months History of psychotic disorder or bipolar disorder Currently participating in a weight loss, nutrition, or physical activity study or program or other study that would interfere with this study Currently using prescription medications with known effects on appetite or weight (e.g., oral steroids, weight loss medications), with the exception of individuals on a stable dose of Selective Serotonin Reuptake Inhibitors (SSRIs) for 3 months) Previous surgical procedure for weight loss or planned weight loss surgery in the next year Another member of the household is a participant or staff member on this trial Reason to suspect that the participant would not adhere to the study intervention Reside outside of the United States
Sites / Locations
- University of North Carolina at Chapel HillRecruiting
Arms of the Study
Arm 1
Arm 2
Arm 3
Arm 4
Arm 5
Arm 6
Arm 7
Arm 8
Experimental
Experimental
Experimental
Experimental
Experimental
Experimental
Experimental
Experimental
Core Behavioral Weight Loss (BWL) Intervention
Core BWL Intervention + BCT 1 Message (Action Planning)
Core BWL Intervention + BCT 2 Message (Discrepancy)
Core BWL Intervention + BCT 3 Message (Feedback on Outcome of Behavior)
Core BWL Intervention + BCT 4 Message (Social Support)
Core BWL Intervention + BCT 5 Message (Social Comparison)
Core BWL Intervention + BCT 6 Message (Social Reward)
Core BWL Intervention + BCT 7 Message (Focus on Past Success)
Behavioral weight loss core intervention, includes activity tracker, wireless scale, daily self-weighing, and smartphone app with weekly behavioral lessons, food tracking log, weekly tailored feedback summary, and daily weight-related behavioral goals. Core intervention component is combined with each of the 7 intervention messages to be tested repeatedly over time.
Core BWL Intervention + Message testing the Behavior Change Technique "Action Planning"
Core BWL Intervention + Message testing the Behavior Change Technique "Discrepancy Between Current Behavior and Goal"
Core BWL Intervention + Message testing the Behavior Change Technique "Feedback on Outcome of Behavior"
Core BWL Intervention + Message testing the Behavior Change Technique "Social Support"
Core BWL Intervention + Message testing the Behavior Change Technique "Social Comparison"
Core BWL Intervention + Message testing the Behavior Change Technique "Social Reward"
Core BWL Intervention + Message testing the Behavior Change Technique "Focus on Past Success"