A Study to See if an iPhone Weight Management App Can Help Promote Weight Loss in Adolescents and Young Adults After a Stem Cell Transplant

May 7, 2026 updated by: Jonsson Comprehensive Cancer Center

Behavioral Weight Loss Intervention Utilizing Mobile Health Technology in Hematopoietic Stem Cell Transplant Patients (BWL001)

This early phase I trial studies how well a behavioral weight loss intervention consisting of a smartphone application and coaching works for the promotion of weight loss in adolescents and young adults after a stem cell transplant. This study may help researchers learn more about how adolescents and young adults can lose weight and develop healthy eating habits.

Study Overview

Status

Status

Indicates the current recruitment status or the expanded access status.
Recruiting

Conditions

Conditions

The disease, disorder, syndrome, illness, or injury that is being studied. On ClinicalTrials.gov, conditions may also include other health-related issues, such as lifespan, quality of life, and health risks.

Intervention / Treatment

Intervention / Treatment

A process or action that is the focus of a clinical study. Interventions include drugs, medical devices, procedures, vaccines, and other products that are either investigational or already available. Interventions can also include noninvasive approaches, such as education or modifying diet and exercise.

Detailed Description

PRIMARY OBJECTIVE:

I. To evaluate the effectiveness of an addiction-based weight loss intervention, embodied as a smartphone application (app) with telephone coaching, on weight outcomes of overweight and obese post hematopoietic stem cell transplantation (HSCT) adolescents and young adults.

SECONDARY OBJECTIVES:

I. To evaluate the changes in metabolic parameters and physical activity levels, in addition to modifications in addictive eating behaviors, motivation, and self-regulatory behaviors.

II. To evaluate the feasibility, adherence, and satisfaction of this intervention.

OUTLINE:

Patients receive an iPhone with W8Loss2Go app, a body scale and a digital food scale to weigh themselves and food daily. Patients interact with coaches via text messages for 4 days weekly and receive weekly 15 minute phone calls for appointment reminders, emotional support, progress discussion, and follow up on items discussed in a prior visit or phone call. Patients also have telemedicine interviews with the coach lasting 60 minutes at 2 and 4 months to elicit both positive and negative impacts on weight management and to identify barriers such as emotional eating, displacement behaviors, poor coping skills to life stressors, and social challenges. Patients who opt to extend the intervention until month 12 attend an additional telemedicine meeting with the coach. Patients also complete questionnaires over approximately 1.5 hours.

Study Type

Study Type

Describes the nature of a clinical study. Study types include interventional studies (also called clinical trials), observational studies (including patient registries), and expanded access.
Interventional

Enrollment (Estimated)

Enrollment

The number of participants in a clinical study. The "anticipated" enrollment is the target number of participants that the researchers need for the study.
20

Phase

Phase

The stage of a clinical trial studying a drug or biological product, based on definitions developed by the U.S. Food and Drug Administration (FDA). The phase is based on the study's objective, the number of participants, and other characteristics. There are five phases: Early Phase 1 (formerly listed as Phase 0), Phase 1, Phase 2, Phase 3, and Phase 4. Not Applicable is used to describe trials without FDA-defined phases, including trials of devices or behavioral interventions.
  • Not Applicable

Contacts and Locations

This section provides the contact details for those conducting the study, and information on where this study is being conducted.

Study Locations

  • United States
    • California
      • Los Angeles, California, United States, 90095
        • Recruiting
        • UCLA / Jonsson Comprehensive Cancer Center
        • Contact:
        • Principal Investigator:
          • Theodore B. Moore

Participation Criteria

Researchers look for people who fit a certain description, called eligibility criteria. Some examples of these criteria are a person's general health condition or prior treatments.

Eligibility Criteria

Eligibility Criteria

The key requirements that people who want to participate in a clinical study must meet or the characteristics they must have. Eligibility criteria consist of both inclusion criteria (which are required for a person to participate in the study) and exclusion criteria (which prevent a person from participating). Types of eligibility criteria include whether a study accepts healthy volunteers, has age or age group requirements, or is limited by sex.

Ages Eligible for Study

13 years to 30 years (Child, Adult)

Accepts Healthy Volunteers

Yes

Description

Inclusion Criteria:

  • Patients with a history of HSCT of any type, at least 100 days post-transplant at initial consultation of the study, will be eligible for the study
  • Patients must classify as obese, represented as body mass index (BMI) >= 85th percentile for age and gender
  • Patients must also be able to read English since the app intervention is only available in English form
  • No patients will be excluded for any specific underlying medical condition, but decisions will be made on a case by case basis if a patient's functioning is deemed to significantly interfere with intervention participation
  • PARENT:
  • His/her child meets all inclusion criteria
  • >= 18 years of age
  • Can speak English

Exclusion Criteria:

  • Patients who are < 100 days post-transplant at initial consultation will not be eligible for the study, but may become eligible if they are > 100 days post-transplant at their next consultation that falls within the enrollment window
  • Patients whose BMI does not fall under the obese category will be excluded

Study Plan

This section provides details of the study plan, including how the study is designed and what the study is measuring.

How is the study designed?

Design Details

  • Primary Purpose: Supportive Care
  • Allocation: N/A
  • Interventional Model: Single Group Assignment
  • Masking: None (Open Label)

Arms and Interventions

Participant Group / Arm

Participant Group / Arm

A group or subgroup of participants in a clinical trial that receives a specific intervention/treatment, or no intervention, according to the trial's protocol.
Intervention / Treatment

Intervention / Treatment

A process or action that is the focus of a clinical study. Interventions include drugs, medical devices, procedures, vaccines, and other products that are either investigational or already available. Interventions can also include noninvasive approaches, such as education or modifying diet and exercise.
Experimental: Supportive Care (app, scales, coaching, questionnaire)
Patients receive an iPhone with W8Loss2Go app, a body scale and a digital food scale to weigh themselves and food daily. Patients interact with coaches via text messages for 4 days weekly and receive weekly 15 minute phone calls for appointment reminders, emotional support, progress discussion, and follow up on items discussed in a prior visit or phone call. Patients also have telemedicine interviews with the coach lasting 60 minutes at 2 and 4 months to elicit both positive and negative impacts on weight management and to identify barriers such as emotional eating, displacement behaviors, poor coping skills to life stressors, and social challenges. Patients who opt to extend the intervention until month 12 attend an additional telemedicine meeting with the coach. Patients also complete questionnaires over approximately 1.5 hours.
Other: Questionnaire Administration
Complete questionnaires
Other: Interview
Participate in interviews
Other: Media Intervention
Receive iPhone with W8Loss2Go app
Other: Scale Device
Receive body scale and food scale
Other Names:
  • Scale
Behavioral: Telephone-Based Intervention
Receive telephone calls
Other: Text Message
Receive text message
Other Names:
  • Short Message Service (SMS) Text
  • Text
  • SMS Text Message

What is the study measuring?

Primary Outcome Measures

Primary Outcome Measures

In a clinical study's protocol, the planned outcome measure that is the most important for evaluating the effect of an intervention/treatment. Most clinical studies have one primary outcome measure, but some have more than one.
Outcome Measure
Measure Description
Time Frame
Change in body mass index (BMI) status
Time Frame: Baseline up to 12 months
The main outcomes measures will be height (meters), weight (kg), and BMI (kg/m^2). Height will be measured to assess consistency in height measurements. Weight will be measured to assess trends in weight over the time span of the intervention. BMI will be measured as a product of weight and height to obtain an appropriate metric that accounts for these measures, and is the standard measure to assess weight progression in weight intervention studies.
Baseline up to 12 months

Secondary Outcome Measures

Secondary Outcome Measures

In a clinical study's protocol, a planned outcome measure that is not as important as the primary outcome measure for evaluating the effect of an intervention but is still of interest. Most clinical studies have more than one secondary outcome measure.
Outcome Measure
Measure Description
Time Frame
Adherence
Time Frame: Up to 12 months
Compliance with app intervention will be measured by daily interaction with the application and the coach. A point system has been designed in the application to measure compliance with the app intervention, measured by +/- weight measured daily, logging of problem foods, logging of snacking panel, and logging of meals. The coach interacts with the participants through text daily, and through phone calls weekly.
Up to 12 months
Fasting lab test analysis: HbA1c
Time Frame: At four months up to 12 months
HbA1c: Glycated hemoglobin (A1C) test result reflects your average blood sugar level for the past two to three months. Specifically, the A1C test measures what percentage of your hemoglobin is coated with sugar. The healthy range is between 4% and 5.6%
At four months up to 12 months
Fasting lab test analysis: Total cholesterol
Time Frame: At four months up to 12 months
Total cholesterol: This measures the overall amount of cholesterol in your blood. The healthy range is < 170 mg/dL
At four months up to 12 months
Fasting lab test analysis: Low density lipoprotein
Time Frame: At four months up to 12 months
LDL: low density lipoprotein (LDL) is the bad cholesterol in your blood. The healthy range is <100 mg/dL
At four months up to 12 months
Fasting lab test analysis: High density lipoprotein
Time Frame: At four months up to 12 months
HDL: high density lipoprotein (HDL) is the good cholesterol in your blood. The healthy range is > 45 mg/dL
At four months up to 12 months
Fasting lab test analysis: triglycerides
Time Frame: At four months up to 12 months
TG: triglycerides (TG) are a type of lipid in your blood. The healthy range is < 150 mg/dL
At four months up to 12 months
Fasting lab test analysis: aspartate/alanine aminotransferase
Time Frame: At four months up to 12 months
AST/ALT: aspartate/alanine aminotransferase (AST/ALT) are liver enzymes to measure liver health. The healthy range or AST is 10-34 IU/L and the healthy range for ALT is 8-37 IU/L.
At four months up to 12 months
Fasting lab test analysis: glucose
Time Frame: At four months up to 12 months
Glucose: This measures the amount of sugar in your blood. We measure this after fasting for 8 hours. The healthy range is 70-99 mg/dL
At four months up to 12 months
Yale Food Addiction Scale
Time Frame: Up to 12 months
visual analog scale (1: never to 5:always). Higher scores may suggest more addictive like eating
Up to 12 months
Center for epidemiologic studies depression scale
Time Frame: Up to 12 months
4 categorical options (never/rarely, sometimes, moderately, all of the time). A higher score suggests utility for screening for depression
Up to 12 months
Perceived stress scale
Time Frame: Up to 12 months
Likert Scale (0: never to 4:very often). Higher scores suggests higher stress
Up to 12 months
Satisfaction with program
Time Frame: Up to 12 months
Measured by "Satisfaction Survey". This Likert Scale will be completed by the participant and their parent at the end of the study. This scale uses a Likert Scale where 1 = completely disagree to 7 = completely agree. Higher scores suggest greater satisfaction with the intervention.
Up to 12 months
Demographic questionnaire
Time Frame: Up to 12 months
10 questions with varying options to inquire about common demographic questions (gender, age, primary language, etc). Questions are descriptive in nature and no score is assigned.
Up to 12 months
Food craving questionnaire
Time Frame: Up to 12 months
Likert scale (1: never to 5: always). A higher score suggests higher degrees of food cravings
Up to 12 months
Binge eating disorder screen
Time Frame: Up to 12 months
4 categorical options (never/rarely, sometimes, often, always). A higher score suggests utility for screening for binge eating disorder
Up to 12 months
Physical activity questionnaire
Time Frame: Up to 12 months
participants identify number of times (0 to more than 7) that they conducted a particular physical activity in the past 7 days. This includes skipping, rowing, etc.
Up to 12 months
S weight
Time Frame: Up to 12 months
Likert scale (1: strongly disagree to 5: strongly agree). Higher scores indicates more motivation for change in weight
Up to 12 months
Height encounters questionnaire
Time Frame: Up to 12 months
six questions about the participants health care utilization in the past month. Questions are descriptive in nature and no score is assigned.
Up to 12 months

Collaborators and Investigators

This is where you will find people and organizations involved with this study.

Sponsor

Sponsor

The organization or person who initiates the study and who has authority and control over the study.
Jonsson Comprehensive Cancer Center

Collaborators

Collaborators

An organization other than the sponsor that provides support for a clinical study. This support may include activities related to funding, design, implementation, data analysis, or reporting.
eHealth International, INC.

Investigators

Investigators

A researcher involved in a clinical study. Related terms include site principal investigator, site sub-investigator, study chair, study director, and study principal investigator.
  • Principal Investigator: Theodore B Moore, UCLA / Jonsson Comprehensive Cancer Center

Study record dates

These dates track the progress of study record and summary results submissions to ClinicalTrials.gov. Study records and reported results are reviewed by the National Library of Medicine (NLM) to make sure they meet specific quality control standards before being posted on the public website.

Study Major Dates

Study Start (Actual)

Study Start

The actual date on which the first participant was enrolled in a clinical study. The "anticipated" study start date is the date that the researchers think will be the study start date.
July 1, 2020

Primary Completion (Estimated)

Primary Completion

The date on which the last participant in a clinical study was examined or received an intervention to collect final data for the primary outcome measure. Whether the clinical study ended according to the protocol or was terminated does not affect this date. For clinical studies with more than one primary outcome measure with different completion dates, this term refers to the date on which data collection is completed for all the primary outcome measures. The "anticipated" primary completion date is the date that the researchers think will be the primary completion date for the study.
December 31, 2026

Study Completion (Estimated)

Study Completion

The date on which the last participant in a clinical study was examined or received an intervention/treatment to collect final data for the primary outcome measures, secondary outcome measures, and adverse events (that is, the last participant's last visit). The "anticipated" study completion date is the date that the researchers think will be the study completion date.
December 31, 2027

Study Registration Dates

First Submitted

First Submitted

The date on which the study sponsor or investigator first submitted a study record to ClinicalTrials.gov. There is typically a delay of a few days between the first submitted date and the record's availability on ClinicalTrials.gov (the first posted date).
June 10, 2020

First Submitted That Met QC Criteria

First Submitted That Met QC Criteria

The date on which the study sponsor or investigator first submits a study record that is consistent with National Library of Medicine (NLM) quality control (QC) review criteria. The sponsor or investigator may need to revise and submit a study record one or more times before NLM's QC review criteria are met. It is the responsibility of the sponsor or investigator to ensure that the study record is consistent with the NLM QC review criteria.
June 29, 2020

First Posted (Actual)

First Posted

The date on which the study record was first available on ClinicalTrials.gov after National Library of Medicine (NLM) quality control (QC) review has concluded. There is typically a delay of a few days between the date the study sponsor or investigator submitted the study record and the first posted date.
July 1, 2020

Study Record Updates

Last Update Posted (Actual)

Last Update Posted

The most recent date on which changes to a study record were made available on ClinicalTrials.gov. There may be a delay between when the changes were submitted to ClinicalTrials.gov by the study's sponsor or investigator (the last update submitted date) and the last update posted date.
May 11, 2026

Last Update Submitted That Met QC Criteria

Last Update Submitted That Met QC Criteria

The most recent date on which the study sponsor or investigator submitted changes to a study record that are consistent with National Library of Medicine (NLM) quality control (QC) review criteria. It is the responsibility of the sponsor or investigator to ensure that the study record is consistent with the NLM QC review criteria.
May 7, 2026

Last Verified

Last Verified

The most recent date on which the study sponsor or investigator confirmed the information about a clinical study on ClinicalTrials.gov as accurate and current. If a study with a recruitment status of recruiting; not yet recruiting; or active, not recruiting has not been confirmed within the past 2 years, the study's recruitment status is shown as unknown.
May 1, 2026

More Information

Terms related to this study

Additional Relevant MeSH Terms

Other Study ID Numbers

Other Study ID Numbers

Identifiers or ID numbers other than the NCT number that are assigned to a clinical study by the study's sponsor, funders, or others. These numbers may include unique identifiers from other trial registries and National Institutes of Health grant numbers.
  • 19-001992
  • NCI-2020-02687 (Registry Identifier: CTRP (Clinical Trial Reporting Program))

Drug and device information, study documents

Studies a U.S. FDA-regulated drug product

No

Studies a U.S. FDA-regulated device product

No

product manufactured in and exported from the U.S.

No

This information was retrieved directly from the website clinicaltrials.gov without any changes. If you have any requests to change, remove or update your study details, please contact register@clinicaltrials.gov. As soon as a change is implemented on clinicaltrials.gov, this will be updated automatically on our website as well.

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