Insul-In This Together: Leveraging Family Support and Diabetes Technology for Adolescents Living With Type 1 Diabetes (IITT)

September 28, 2026 updated by: Jessie Wong, Stanford University

The goal of this clinical trial is to learn if the "Insul-In This Together" family program works to improve outcomes for adolescents living with type 1 diabetes. It will also learn about how the program influences diabetes-related factors, including parenting. The main questions it aims to answer are:

Does this program improve glycemic (blood glucose) outcomes? Does this program improve adolescent quality of life related to diabetes? Researchers will offer the program to all participating families, with one group receiving the program right after enrollment and another group receiving the program 6 months later.

Adolescent and parent participants will:

Attend 8 weekly 30-minute videoconference sessions with an interventionist Complete online surveys, share diabetes device data, and conduct at-home A1c tests 3-5 times over a 12-month period

Study Overview

Status

Status

Indicates the current recruitment status or the expanded access status.
Not yet 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

The proposed study is a nationwide randomized controlled trial with 200 adolescents ages 12-17 living with type 1 diabetes for at least six months who are US residents and their parents. Participants will be randomized 1:1 to either the intervention condition (offered the intervention immediately post-baseline) or the waitlisted control condition (offered the intervention after completing the 6-month follow-up). The primary outcome endpoint will be 3-month post-baseline, based on prior findings. This cross-over design will support recruitment and retention and offer all participants the opportunity to receive this empirically supported program, while maintaining an experimental comparison group. The revised intervention includes eight 30-minute weekly sessions to be delivered to each parent-adolescent dyad by a trained interventionist. Didactic and interactive content targets parental monitoring, involvement strategies, collaborative problem-solving, and communication across six sessions with two glycemic sessions that focus on glucose monitoring, data interpretation, and strategies to increase/optimize technology use. Data will be gathered via adolescent and parent report, continuous glucose monitoring (CGM) and other device data, and at-home HbA1c test kits. We will assess intervention outcomes, differential intervention responses, and key drivers of change.

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.
200

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 Contact

Study Contact

The name and contact information for the person who can answer enrollment questions for a clinical study. Each location where the study is being conducted may also have a specific contact, who may be better able to answer those questions.

Study Locations

  • United States
    • California
      • Palo Alto, California, United States, 94305
        • Stanford University
        • Contact:
        • Principal Investigator:
          • Jessie J Wong, PhD

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

12 years and older (Child, Adult, Older Adult)

Accepts Healthy Volunteers

No

Genders Eligible for Study

Female

Description

Inclusion Criteria:

  • For adolescent participants: ages 12-17, diagnosed with type 1 diabetes for at least 6 months, US resident, English proficiency, and resides with the participating parent/caregiver.
  • For parent participants: residing with eligible and participating adolescent, US resident, and English proficiency.

Exclusion Criteria:

  • Severe or pervasive physical or mental health condition that would limit participation in data collection or the intervention (e.g., pervasive developmental delays).

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: Treatment
  • Allocation: Randomized
  • Interventional Model: Crossover 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: Intervention

Offered the intervention immediately after Baseline data collection
Behavioral: Insul-In This Together

The "Insul-In This Together" intervention consists of eight weekly 30-minute sessions. Each adolescent-parent dyad (an adolescent with corresponding parent/caregiver) meets remotely with an interventionist (not in groups). The structure of adolescents and parents receiving the intervention as a single dyad (not in groups) offers space to discuss sensitive topics and flexibility to accommodate variability in families' schedules. Intervention content targets diabetes-related parental monitoring, involvement, and conflict with a focus on communication and problem-solving skills. Diabetes technology use is addressed related to shared goals, expectations, and communication based on each family's current use.
Other: Waitlisted Control

Offered the intervention after 6-Month Post-Baseline data collection
Behavioral: Insul-In This Together

The "Insul-In This Together" intervention consists of eight weekly 30-minute sessions. Each adolescent-parent dyad (an adolescent with corresponding parent/caregiver) meets remotely with an interventionist (not in groups). The structure of adolescents and parents receiving the intervention as a single dyad (not in groups) offers space to discuss sensitive topics and flexibility to accommodate variability in families' schedules. Intervention content targets diabetes-related parental monitoring, involvement, and conflict with a focus on communication and problem-solving skills. Diabetes technology use is addressed related to shared goals, expectations, and communication based on each family's current use.

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
Adolescent diabetes-related quality of life
Time Frame: From Baseline (post enrollment) to 12-month post-baseline

The Type 1 Diabetes and Life (T1DAL) survey is a 23-item scale with a teen version (ages 12-17) and a young adult version (ages 18-25) that capture quality of life related to living with diabetes (for those who turn 18 during the study).
From Baseline (post enrollment) to 12-month post-baseline
Percent time-in-range (TIR)
Time Frame: From baseline (post enrollment) to 12-month post-baseline

TIR is strongly linked to risk of health complications and offers valuable insights beyond hemoglobin A1c, particularly.13 Percent time spent in target range (70-180mg/dL) will be calculated based on continuous glucose monitoring (CGM) data captured in a 14-day window. At least 10 days of data will be required within the 14-day window to be included in analyses.
From baseline (post enrollment) to 12-month post-baseline

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
Hemoglobin A1c
Time Frame: From baseline (post enrollment) to 12-month post-baseline

HbA1c results will be gathered based on at-home test kits provided and analyzed by University of Minnesota.
From baseline (post enrollment) to 12-month post-baseline
Adolescent diabetes distress
Time Frame: From baseline (post enrollment) to 12-month post-baseline

The Problem Areas in Diabetes questionnaire (PAID) is a 20-item scale of emotional responses related to diabetes distress among adolescents.
From baseline (post enrollment) to 12-month post-baseline
Parent diabetes distress
Time Frame: From Baseline (post enrollment) to 12-month post-baseline

The Parent Diabetes Distress Scale (P-DDS) is a 20-item measure of diabetes related distress among parents of teens with diabetes.
From Baseline (post enrollment) to 12-month post-baseline

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.
Stanford University

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 (Estimated)

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.
January 1, 2028

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 1, 2031

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.
June 1, 2032

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).
September 28, 2026

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.
September 28, 2026

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.
October 5, 2026

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.
October 5, 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.
September 28, 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.
September 1, 2026

More Information

Terms related to this study

Keywords

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.
  • 88772

Plan for Individual participant data (IPD)

Plan to Share Individual Participant Data (IPD)?

YES

IPD Plan Description

De-identified individual participant data may be shared with qualified researchers upon reasonable request after publication of the primary results. Requests will be reviewed by the study team and will require a scientifically sound proposal, institutional approvals as applicable, and a data use agreement that prohibits re-identification or onward sharing. Data sharing will be limited to information that can be provided without compromising participant privacy or confidentiality.

Drug and device information, study documents

Studies a U.S. FDA-regulated drug product

No

Studies a U.S. FDA-regulated device product

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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