Weight loss app for adolescents

A Displacement Theory Mobile Health Weight Loss Intervention: A Pilot Clinical Trial

Not applicable Interventional University of California, Los Angeles · NCT05530538

This study is testing a new smartphone app to help teenagers with obesity cut down on overeating by getting their feedback during the development process.

Quick facts

PhaseNot applicable
Study typeInterventional
Enrollment38 (estimated)
Ages14 Years to 21 Years
SexAll
SponsorUniversity of California, Los Angeles Academic / other
Locations1 site (Los Angeles, California)
Trial IDNCT05530538 on ClinicalTrials.gov

What this trial studies

This project aims to develop and test a smartphone app designed to help adolescents with obesity reduce over-eating behaviors. The app is based on displacement theory, which suggests that addictive behaviors stem from situations that individuals feel unable to confront. The development process will involve input from various stakeholders, including healthcare professionals and individuals with obesity. The app will undergo beta testing with two groups of teens to gather feedback and make necessary modifications, followed by an evaluation of its feasibility among a larger group of adolescents.

Who should consider this trial

Good fit: Ideal candidates for this study are adolescents aged 14-18 who are motivated to lose weight and have a BMI at or above the 95th percentile for their age and gender.

Not a fit: Patients with psychiatric conditions or developmental delays that require ongoing treatment may not benefit from this study.

Why it matters

Potential benefit: If successful, this app could provide adolescents with effective tools to manage their eating behaviors and promote healthier lifestyles.

How similar studies have performed: Other studies have shown promise in using technology-based interventions for weight management, suggesting that this approach could be effective.

Eligibility criteria

Show full inclusion / exclusion criteria
Inclusion Criteria:

1. 14-21 years old
2. Has an iPhone or are willing to use a study iPhone
3. Ability to read and speak English
4. Endorsement of one of the three items listed below on the five-item S-weight questionnaire indicating motivation for change During the last year I haven't done anything to lose weight but I'm planning to do something over the next 30 days.

I've been making an effort to lose weight (by dieting1 and/or exercising2) for less than 6 months.

I've been making an effort to maintain my weight (by dieting1 and/or exercising2) for more than 6 months.

6\. Body mass index \[BMI\] ≥85th percentile for age and gender

Exclusion Criteria:

1. Any psychiatric condition and/or developmental delay which would require immediate or ongoing treatment that would make study participation difficult or harmful
2. Parent/guardian-reported physical, mental of other inability to provide consent or refusal to provide consent for minor children
3. Self-reported diagnosis of Prader-Willi Syndrome, brain tumor, hypothalamic obesity, or other diagnosis associated with obesity
4. Concurrent participation in an alternative weight loss intervention
5. Participation in the study team's previous app weight loss studies (exclusion for trial but not beta testing participants)

Where this trial is running

Los Angeles, California

Study contacts

How to participate

  1. Review the eligibility criteria above with your treating physician.
  2. Visit the official trial page on ClinicalTrials.gov for the most current contact information and recruitment status.
  3. Contact the listed study coordinator or principal investigator to request pre-screening. Pre-screening is free and never obligates you to enroll.
Conditions Weight LossObesity and OverweightAdolescentsSmartphone AppObesityOverweight
Last reviewed 2026-06-15 by the Find a Trial editorial team. Information on this page is for educational purposes and is not medical advice. Always consult qualified healthcare professionals about clinical trial participation.