NCT05402137

Daily Habits & Consumer Preferences Study

Completed NA Results posted Last updated 20 January 2026

What this trial tests

NA trial testing Weight stigma intervention in Obesity in 330 participants. Completed in 3 August 2024.

Timeline

28 April 2022

Primary endpoint
3 August 2024

3 August 2024

Quick facts

Lead sponsor	University of California, Los Angeles
Phase	NA
Status	Completed
Study type	INTERVENTIONAL
Allocation	randomized
Design	parallel
Masking	single
Primary purpose	basic science
Enrollment	330
Start date	28 April 2022
Primary completion	3 August 2024
Estimated completion	3 August 2024
Sites	1 location across United States

Drugs / interventions tested

• Weight stigma intervention

Conditions studied

• Obesity — all drugs for Obesity →

Sponsor

University of California, Los Angeles

Who can join

18 and older, any sex, with Obesity. Patients with the condition only — healthy volunteers not accepted.

Results — posted to ClinicalTrials.gov

Per-arm endpoint measurements with 95% confidence intervals where reported. Source: trial results section.

Hyperpalatable Food Intake Primary · Hyperpalatable food intake will be measured directly after the intervention, on average 10 minutes later.

Hyperpalatable food intake will initially be measured in grams and then converted into kilocalories. The food will consist of the following items: chocolate chip cookies, M\&Ms, potato chips, and Sprite. These foods were chosen because processed foods, added sugars, refined grains, starchy vegetables, and sugar sweetened beverages are foods to avoid according to the 2019 American Diabetes Association Nutrition Consensus Report and are high in carbohydrates and glycemic index.

Group	Value	95% CI
Control Group	325.95	± 261.24
Experimental Group	262.51	± 224.09

Change in Self-reported Dietary Intake Primary · Change in self-reported dietary intake will be assessed by measuring self-reported dietary intake 72 hours before the intervention as part of the baseline, and 72 hours after the intervention.

Dietary intake data for food recalls will be collected and analyzed using the Automated Self-Administered 24-hour (ASA24) Dietary Assessment Tool developed by the National Cancer Institute, Bethesda, MD. The primary eating outcome for the food diaries will be kilocalories.

Group	Value	95% CI
Control Group	100.32	± 911.66
Experimental Group	65.20	± 916.82

Change in Physical Activity Primary · Change in physical activity will be assessed by measuring physical activity for 72 hours before the intervention as part of the baseline, and 72 hours after the intervention.

Physical activity, quantified as Metabolic Equivalent of Task (MET) units, will be assessed using ActivPAL4 actigraphs.

Group	Value	95% CI
Control Group	-0.50	± 6.24
Experimental Group	-0.90	± 5.84

Change in Sleep Duration Primary · Change in sleep duration will be assessed by measuring sleep duration for three days before the intervention as part of the baseline, and three days after the intervention.

Change in sleep duration will be assessed using an Actiwatch-2 (Philips Respironics). Data will be captured in 30-second epochs and validated. Actiware 6.0.9 software algorithms will be used to estimate sleep parameters with the following sleep/wake algorithm: D = A-2\*(1/25) + A1\*(1/5) + A\*(1) + A + 1\*(1/5) + A + 2\*(1/25), where AX = accelerometer activity for that minute.

Group	Value	95% CI
Control Group	0.13	± 1.38
Experimental Group	-0.28	± 1.26

Change in Self-reported Sleep Quality Primary · Change in self-reported sleep quality will be assessed by measuring self-reported sleep quality during the mornings of the first 72 hour baseline period before the intervention, and in the mornings of the 72 hour period after the intervention.

Participants will respond to a single item assessing past night's sleep quality, with response options ranging from 1 (very bad) to 4 (very good). Change in subjective sleep quality will be calculated by taking the difference of the item score pre- and post-intervention. The possible minimum for change in self-reported sleep quality is -3 and the possible maximum is 3. In this difference score, higher scores indicate improvements in sleep quality from baseline to post.

Group	Value	95% CI
Control Group	-0.01	± 0.52
Experimental Group	-0.04	± 0.57

Change in Sleep Onset Latency Primary · Change in sleep onset latency will be assessed by measuring sleep onset latency for three days before the intervention as part of the baseline, and three days after the intervention.

Change in sleep onset latency will be assessed using an Actiwatch-2 (Philips Respironics). Data will be captured in 30-second epochs and validated. Actiware 6.0.9 software algorithms will be used to estimate sleep parameters with the following sleep/wake algorithm: D = A-2\*(1/25) + A1\*(1/5) + A\*(1) + A + 1\*(1/5) + A + 2\*(1/25), where AX = accelerometer activity for that minute. Sleep onset is operationalized as after 10 consecutive minutes of D ≤ 40 (as D \> 40 indicates participants are awake).

Group	Value	95% CI
Control Group	4.80	± 35.15
Experimental Group	10.09	± 20.45

Change in Sleep Efficiency Primary · Change in sleep efficiency will be assessed by measuring sleep efficiency for three days before the intervention as part of the baseline, and three days after the intervention.

Change in sleep efficiency will be assessed using an Actiwatch-2 (Philips Respironics). Data will be captured in 30-second epochs and validated. Actiware 6.0.9 software algorithms will be used to estimate sleep parameters with the following sleep/wake algorithm: D = A-2\*(1/25) + A1\*(1/5) + A\*(1) + A + 1\*(1/5) + A + 2\*(1/25), where AX = accelerometer activity for that minute. The possible minimum value is -100 and the possible maximum value is 100. Higher scores indicate better sleep efficiency.

Group	Value	95% CI
Control Group	0.33	± 14.96
Experimental Group	-5.01	± 8.09

Sponsor's own description

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.

Publications & conference data

No peer-reviewed publications indexed yet for this trial. Completed trials usually publish results within 12-18 months.