Applying Social Comparison Theory to Behavioral Weight Loss: Does Modifying Group Membership Improve Outcome?

Study Overview
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Brief Summary
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The purpose of this study is to determine whether a modified behavioral treatment for weight loss that includes one-on-one treatment for individuals struggling to lose weight is associated with more weight loss than a standard behavioral treatment.

Official Title
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Applying Social Comparison Theory to Behavioral Weight Loss: Does Modifying Group Membership Improve Outcome?

Conditions
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Obesity

Intervention / Treatment
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* Behavioral: Standard behavioral treatment for weight loss
* Behavioral: Modified behavioral treatment for weight loss


Participation Criteria
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Eligibility Criteria
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Inclusion Criteria: BMI between 27 and 45 kg/m2 Exclusion Criteria: participating in a weight loss program or taking a weight loss medication currently pregnant, lactating, or less than 6-months post-partum or plan to become pregnant during the time of the intervention. report a heart condition, chest pain during periods of activity or rest, or loss of consciousness report conditions that would render the participant unlikely to follow the study protocol (e.g., terminal illness, relocation, substance abuse, sever psychiatric condition, dementia).

Ages Eligible for Study
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Minimum Age: 21 Years
Maximum Age: 70 Years

Sexes Eligible for Study
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All

Accepts Healthy Volunteers
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No

Study Plan
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How is the study designed?
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Design Details

Primary Purpose: Treatment
Allocation: Randomized
Intervention Model: Parallel Assignment
Masking: None (Open Label)


Arms and Interventions

| Participant Group/Arm | Intervention/Treatment |
| --- | --- |
| Active Comparator: 1<br>A 24-week intervention in which individuals will meet weekly to be instructed on behavioral change associated with weight loss, including modifying dietary intake, self-monitoring weight and eating behaviors, and increasing physical activity. | Behavioral: Standard behavioral treatment for weight loss<br>* A 24-week intervention in which individuals will meet weekly to be instructed on behavioral change associated with weight loss, including modifying dietary intake, self-monitoring weight and eating behaviors, and increasing physical activity.<br>|
| Experimental: 2<br>A 24-week intervention in which individuals will meet weekly to be instructed on behavioral change associated with weight loss, including modifying dietary intake, self-monitoring weight and eating behaviors, and increasing physical activity. In this intervention, individuals not meeting weight loss goals will be given one-on-one treatment. | Behavioral: Modified behavioral treatment for weight loss<br>* A 24-week intervention in which individuals will meet weekly to be instructed on behavioral change associated with weight loss, including modifying dietary intake, self-monitoring weight and eating behaviors, and increasing physical activity. In this intervention, individuals not meeting weight loss goals will be given one-on-one treatment.<br>|

What is the study measuring?
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Primary Outcome Measures

| Outcome Measure | Measure Description | Time Frame |
| --- | --- | --- |
| weight |  | weekly for 24-weeks |