Skip to main content
OpenTrials
Recruiting

NCT Number: NCT06963931

Change 4 Better (C4B)

The purpose of this research study is to determine the effectiveness of the Change4Better (C4B) mobile app at reducing the severity of problem gambling as compared to standard treatment as usual (TAU).

Recruiting

Interested in participating?

Request Info

Key information

Conditions

Age range

18 year and older

Sex eligibility

All sexes

Study type

Interventional

Phase

Not applicable

Primary location

Kindbridge Behavioral Health, Denver, Colorado, United States

Loading trial locations.

About this study

This study is a 6-month randomized clinical trial for individuals with a gambling disorder enrolled in or seeking treatment for problem gambling at an outpatient treatment facilities affiliated with the Bettor Choice Gambling Treatment Programs in Connecticut or Kindbridge Behavioral Health with locations across the US. The purpose is to evaluate the feasibility and efficacy of a cognitive behavioral therapy-based mobile app (Change4Better; C4B), as an adjunct to treatment as usual (TAU) in community-based outpatient treatment programs. Eligible participants will be randomly assigned to receive either: (1) standard treatment as usual (TAU) or (2) TAU plus access to the Change4Better (C4B) mobile app. TAU will consist of standard services provided at outpatient clinics within the Bettor Choice Programs or Kindbridge Behavioral Health. Clinicians providing TAU within the Bettor Choice Programs or Kindbridge Behavioral Health will not be participants in the research trial, and they will not be asked to perform any additional duties outside of their typical services. Participants assigned to C4B will receive TAU plus access to the C4B mobile app, which they can access as often as desired using their own device. The C4B mobile app will be managed by the Yale research team.

Who can participate

Healthy volunteers accepted: No

Only the study team can determine whether someone qualifies for participation.

Inclusion criteria

  • 18 years of age or older;
  • able to speak, read and write in English;
  • report gambling in the past 2 months (60 days);
  • meet DSM-5 criteria for gambling disorder within past 12 months as determined by the Structured Clinical Interview for Pathological Gambling - DSM-5 version (SCI-PG-DSM);
  • at least mild gambling severity as measured by GSAS (Total >8)
  • seeking or currently enrolled in treatment for gambling; if seeking treatment, must be deemed appropriate for outpatient level of care by treatment facility clinical team
  • own a smartphone with internet access.

Exclusion criteria

  • unwilling or unable to provide informed consent due to severe cognitive impairment or inability to read;
  • deemed to have current untreated psychosis or mania;
  • active suicidal ideation;
  • physical dependence on opioids and/or alcohol requiring medical detoxification.

Treatment and study plan

Change4Better (C4B) mobile app

Behavioral

The content of the C4B app is designed to teach key CBT strategies to address gambling behaviors. The content targets concerns that people with gambling problems often experience (gambling debts, cognitive distortions related to gambling - for example, how unrelated events might be related to gambling outcomes). We have designed the content such that people using the app can see the pattern of progress, identify mistakes and setbacks, and learn from common experiences of people with gambling disorder

Primary outcomes

  1. Change in gambling symptom severity

    Time frame: Baseline to 6 months

    Change in gambling symptom severity as measured monthly by the Gambling Symptom Assessment Scale (G-SAS) from baseline to 6 months. Each item is scored on a 5-point scale from 0 (no symptoms) to 4 (extreme symptoms). The total score ranges from 0 to 48.

Secondary outcomes

  1. App engagement-Days Used

    Time frame: Randomization through week 12

    Measured by number of days participants used the app

  2. App engagement- Topics completed

    Time frame: Randomization through week 12

    Measured by number of topics completed by participants

  3. App engagement- Practice exercises

    Time frame: Randomization through week 12

    Measured by number of practice exercises completed

  4. App engagement- Weekly usage

    Time frame: Randomization through week 12

    Measured by average number of minutes per week participants used the app

  5. App engagement- Total time

    Time frame: Randomization through week 12

    Measured by total time participants spent in the app

Study contacts

Contact information is provided by the study sponsor or research team.

Elizabeth Doohan

CONTACT

[email protected]

203-506-8043

Sponsors and collaborators

Lead sponsor

Yale University

Other

Collaborators

  • Mohegan Sun Problem Gambling Treatment Fund

Registry information

Official study title

Change 4 Better (C4B): A Smartphone App to Address Problem Gambling

Acronym: C4B

Important dates

Study start
2025
Primary completion
2027
Study completion
2027
First posted
May 9, 2025
Registry last updated
May 22, 2026

OpenTrials presents study information sourced from ClinicalTrials.gov. The official registry record should be consulted for the latest information.

View the official ClinicalTrials.gov record (opens in a new tab)

This listing is for discovery and informational purposes only. It is not medical advice, does not guarantee that a study is recruiting, and does not determine eligibility. Contact the study team and a qualified healthcare professional when considering participation.

Published trials that share one or more normalized conditions with this study.