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Change 4 Better (C4B)

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

Status
Recruiting
Phases
Unknown
Study type
Interventional
Source
ClinicalTrials.gov
Registry ID
NCT06963931
Acronym
C4B
Enrollment
128
Registered
2025-05-09
Start date
2025-05-01
Completion date
2027-12-01
Last updated
2026-05-22

For informational purposes only — not medical advice. Sourced from public registries and may not reflect the latest updates. Terms

Conditions

Problem Gambling

Keywords

Problem gambling, mobile app

Brief summary

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).

Detailed description

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.

Interventions

BEHAVIORALChange4Better (C4B) mobile app

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

Sponsors

Yale University
Lead SponsorOTHER
Mohegan Sun Problem Gambling Treatment Fund
CollaboratorUNKNOWN

Study design

Allocation
RANDOMIZED
Intervention model
PARALLEL
Primary purpose
TREATMENT
Masking
NONE

Eligibility

Sex/Gender
ALL
Age
18 Years to No maximum
Healthy volunteers
No

Inclusion criteria

1. 18 years of age or older; 2. able to speak, read and write in English; 3. report gambling in the past 2 months (60 days); 4. 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); 5. at least mild gambling severity as measured by GSAS (Total \>8) 6. 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 7. own a smartphone with internet access.

Exclusion criteria

1. unwilling or unable to provide informed consent due to severe cognitive impairment or inability to read; 2. deemed to have current untreated psychosis or mania; 3. active suicidal ideation; 4. physical dependence on opioids and/or alcohol requiring medical detoxification.

Design outcomes

Primary

MeasureTime frameDescription
Change in gambling symptom severityBaseline to 6 monthsChange 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

MeasureTime frameDescription
App engagement-Days UsedRandomization through week 12Measured by number of days participants used the app
App engagement- Topics completedRandomization through week 12Measured by number of topics completed by participants
App engagement- Practice exercisesRandomization through week 12Measured by number of practice exercises completed
App engagement- Weekly usageRandomization through week 12Measured by average number of minutes per week participants used the app
App engagement- Total timeRandomization through week 12Measured by total time participants spent in the app

Countries

United States

Contacts

CONTACTElizabeth Doohan
elizabeth.doohan@yale.edu203-506-8043
PRINCIPAL_INVESTIGATORBrian Kiluk, PhD

Yale Universaity

Outcome results

None listed

Source: ClinicalTrials.gov · Data processed: May 23, 2026