Daily Habits & Consumer Preferences Study

University of California, Los Angeles (UCLA)

Status: Completed

Conditions: Obesity

Treatments: Behavioral: Weight stigma intervention

Study type: Interventional

Funder types: Other

Identifiers

NCT05402137

21-000460

Details and patient eligibility

About

The study will use a between-subjects design in a sample of individuals with BMI greater than or equal to 28 from the Los Angeles community (N=330). Participants will be randomly assigned to a weight stigma vs. control manipulation. Changes to the following health behaviors will be subsequently measured in their everyday lives: 3-day diet as captured by ecological momentary assessment (EMA) food diaries, objectively measured eating of obesogenic foods, objectively measured physical activity captured by 24-hour actigraphy, and sleep, captured objectively by overnight actigraphy and subjectively self-reported sleep measures. The investigators hypothesize that weight stigma causes decrements in health behaviors (e.g., sleep, eating, and physical activity) in everyday life.

Enrollment: 330 patients

Sex: All

Ages: 18+ years old

Volunteers: Accepts Healthy Volunteers

Inclusion criteria

1. Age 18+
2. English-speaking
3. BMI greater than or equal to 28

Exclusion criteria

1. Major mental disorder including eating disorder, mood disorder, schizophrenia, PTSD
2. Recent (<1 year) diagnosis of major physical conditions that limit physical movement
3. Recent (<1 year) diagnosis of sleep disorder
4. Allergy to any of the foods in the food buffet

Trial design

Primary purpose: Basic Science

Allocation: Randomized

Interventional model: Parallel Assignment

Masking: Single Blind

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330 participants in 2 patient groups

Experimental (Weight Stigma) Arm

Experimental group

Description:

Participants undergoing the experimental (Weight Stigma) arm are exposed to an interaction partner (a trained confederate) who endorses anti-fat attitudes. Prior to their interaction, participants exchange a "Getting to Know You Questionnaire" with the confederate, where the confederate endorses anti-fat attitudes. During their interaction with the confederate, participants are told they will be completing consumer rating tasks with another participant in the study. During the ostensible consumer rating task, participants in the experimental condition rate items such as a diet magazine, body sunscreen, running shoes, and a size small T-shirt labeled as size large to bolster the weight stigma manipulation.

Treatment:

Behavioral: Weight stigma intervention

Control Arm

No Intervention group

Description:

Participants undergoing the control arm are also exposed to an interaction partner (a trained confederate) who does not endorse anti-fat attitudes. Prior to their interaction, participants exchange a "Getting to Know You Questionnaire" with the confederate; however, the confederate does not endorse anti-fat attitudes. During their interaction with the confederate, participants are told they will be completing consumer rating tasks with another participant in the study. During the ostensible consumer rating task, participants in the control condition rate items such as an interior design magazine, face sunscreen, regular (non-running) shoes, and a size large T-shirt correctly labeled as size large to avoid weight stigma.