Testing Intervention Strategies for Addressing Obesity and Binge Eating

Study Overview
=================
Brief Summary
-----------------
The purpose of this study is to conduct a randomized pilot trial of a mobile intervention that targets obesity and binge eating.

Official Title
-----------------
Testing Intervention Strategies for Addressing Obesity and Binge Eating

Conditions
-----------------
Obesity, Binge Eating

Intervention / Treatment
-----------------
* Behavioral: Behavioral weight loss
* Behavioral: Intervention component: Decrease overvaluation of weight and shape
* Behavioral: Intervention component: Decrease unhealthy weight control practices
* Behavioral: Intervention component: Decrease negative affect


Participation Criteria
=================
Eligibility Criteria
-----------------
Inclusion Criteria: Adults age 18 years or older Obesity (BMI ≥30) Recurrent binge eating (≥12 episodes in the past 3 months) Interested in losing weight and reducing binge eating Willing to use a mobile application Has a smartphone with Internet access and capacity for calls and text messaging Has a valid email address Has access to a scale Not pregnant English-speaking Exclusion Criteria: Diagnosis for which the study/intervention is not clinically indicated Not currently receiving clinical services for weight management or binge eating

Ages Eligible for Study
-----------------
Minimum Age: 18 Years

Sexes Eligible for Study
-----------------
All

Accepts Healthy Volunteers
-----------------
No

Study Plan
=================
How is the study designed?
-----------------

Design Details

Primary Purpose: Treatment
Allocation: Randomized
Intervention Model: Factorial Assignment
Masking: Single


Arms and Interventions

| Participant Group/Arm | Intervention/Treatment |
| --- | --- |
| Experimental: Condition 1<br>Behavioral weight loss intervention | Behavioral: Behavioral weight loss<br>* Participants will receive behavioral weight loss intervention<br>|
| Experimental: Condition 2<br>Behavioral weight loss intervention and decrease negative affect | Behavioral: Behavioral weight loss<br>* Participants will receive behavioral weight loss intervention<br>Behavioral: Intervention component: Decrease negative affect<br>* Participants will receive an intervention component to decrease negative affect<br>|
| Experimental: Condition 3<br>Behavioral weight loss intervention and decrease unhealthy weight control practices | Behavioral: Behavioral weight loss<br>* Participants will receive behavioral weight loss intervention<br>Behavioral: Intervention component: Decrease unhealthy weight control practices<br>* Participants will receive an intervention component to decrease unhealthy weight control practices<br>|
| Experimental: Condition 4<br>Behavioral weight loss intervention, decrease unhealthy weight control practices, and decrease negative affect | Behavioral: Behavioral weight loss<br>* Participants will receive behavioral weight loss intervention<br>Behavioral: Intervention component: Decrease unhealthy weight control practices<br>* Participants will receive an intervention component to decrease unhealthy weight control practices<br>Behavioral: Intervention component: Decrease negative affect<br>* Participants will receive an intervention component to decrease negative affect<br>|
| Experimental: Condition 5<br>Behavioral weight loss intervention and decrease overvaluation of weight and shape | Behavioral: Behavioral weight loss<br>* Participants will receive behavioral weight loss intervention<br>Behavioral: Intervention component: Decrease overvaluation of weight and shape<br>* Participants will receive an intervention component to decrease overvaluation of weight and shape<br>|
| Experimental: Condition 6<br>Behavioral weight loss intervention, decrease overvaluation of weight and shape, and decrease negative affect | Behavioral: Behavioral weight loss<br>* Participants will receive behavioral weight loss intervention<br>Behavioral: Intervention component: Decrease overvaluation of weight and shape<br>* Participants will receive an intervention component to decrease overvaluation of weight and shape<br>Behavioral: Intervention component: Decrease negative affect<br>* Participants will receive an intervention component to decrease negative affect<br>|
| Experimental: Condition 7<br>Behavioral weight loss intervention, decrease overvaluation of weight and shape, and decrease unhealthy weight control practices | Behavioral: Behavioral weight loss<br>* Participants will receive behavioral weight loss intervention<br>Behavioral: Intervention component: Decrease overvaluation of weight and shape<br>* Participants will receive an intervention component to decrease overvaluation of weight and shape<br>Behavioral: Intervention component: Decrease unhealthy weight control practices<br>* Participants will receive an intervention component to decrease unhealthy weight control practices<br>|
| Experimental: Condition 8<br>Behavioral weight loss intervention, decrease overvaluation of weight and shape, decrease unhealthy weight control practices, and decrease negative affect | Behavioral: Behavioral weight loss<br>* Participants will receive behavioral weight loss intervention<br>Behavioral: Intervention component: Decrease overvaluation of weight and shape<br>* Participants will receive an intervention component to decrease overvaluation of weight and shape<br>Behavioral: Intervention component: Decrease unhealthy weight control practices<br>* Participants will receive an intervention component to decrease unhealthy weight control practices<br>Behavioral: Intervention component: Decrease negative affect<br>* Participants will receive an intervention component to decrease negative affect<br>|

What is the study measuring?
-----------------
Primary Outcome Measures

| Outcome Measure | Measure Description | Time Frame |
| --- | --- | --- |
| Weight | Changes in weight | Measured at baseline, post-intervention (16-weeks), and 3-month follow-up | 
| Binge eating episodes | Changes in episodes of binge eating | Measured at baseline, post-intervention (16-weeks), and 3-month follow-up |