An App to Reduce Cannabis Use Among Emerging Adults
Pilot Project 1. Feasibility Pilot of a JITAI to Reduce Cannabis Use Among Emerging Adults
2 other identifiers
interventional
122
1 country
1
Brief Summary
This study is being completed to pilot prevention methods to promote wellness and reduce risky behaviors, including the use of substances such as cannabis. This study will help researchers learn about ways of delivering this information that is both appealing and helpful to young adults who use mobile apps.
Trial Health
Trial Health Score
Automated assessment based on enrollment pace, timeline, and geographic reach
participants targeted
Target at P50-P75 for not_applicable
Started Feb 2024
Shorter than P25 for not_applicable
1 active site
Health score is calculated from publicly available data and should be used for screening purposes only.
Trial Relationships
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Study Timeline
Key milestones and dates
First Submitted
Initial submission to the registry
April 6, 2023
CompletedFirst Posted
Study publicly available on registry
April 24, 2023
CompletedStudy Start
First participant enrolled
February 21, 2024
CompletedPrimary Completion
Last participant's last visit for primary outcome
May 28, 2024
CompletedStudy Completion
Last participant's last visit for all outcomes
May 28, 2024
CompletedResults Posted
Study results publicly available
June 12, 2025
CompletedJune 12, 2025
June 1, 2025
3 months
April 6, 2023
May 12, 2025
June 10, 2025
Conditions
Keywords
Outcome Measures
Primary Outcomes (2)
App Feasibility
% of participants who consented to the study who download the MiWaves app.
1 month
App Acceptability
Participants will complete acceptability ratings for the MiWaves app within their post-test assessment (percent with positive rating).
1 month
Study Arms (1)
JITAI
EXPERIMENTALExperimental: Within-participant micro-randomization Twice daily in the study, a participant is assigned to receive a message or no message. The micro-randomization will be performed by a reinforcement learning algorithm based on the participant's engagement with the intervention.
Interventions
Behavioral: MiWaves behavioral messages Participants will be using the MiWaves mobile app for 30 days. When a participant is assigned to receive a message, a message will be randomly selected from a pool of intervention message sets. Messages are based in motivational interviewing and include affect management and behavioral economic strategies.
Eligibility Criteria
You may qualify if:
- Reside in the US
- Speak and read English
- Have a smartphone on which the app can be downloaded
- Screen positive for cannabis use 3 or more times each week over the past month
- Report motivation to change cannabis as 1 or higher (using scale of 0-10)
- Meet Study verification criteria (i.e., use of CAPTCHA, IP address checks)
You may not qualify if:
- Use of Medical Cannabis
- Failure to meet study verification criteria
Contact the study team to confirm eligibility.
Sponsors & Collaborators
- University of Michiganlead
- National Institute on Drug Abuse (NIDA)collaborator
Study Sites (1)
University of Michigan
Ann Arbor, Michigan, 48109, United States
MeSH Terms
Conditions
Condition Hierarchy (Ancestors)
Results Point of Contact
- Title
- Inbal Billie Nahum-Shani
- Organization
- University of Michigan
Publication Agreements
- PI is Sponsor Employee
- No
- Restrictive Agreement
- No
Study Design
- Study Type
- interventional
- Phase
- not applicable
- Allocation
- NA
- Masking
- NONE
- Purpose
- OTHER
- Intervention Model
- SINGLE GROUP
- Sponsor Type
- OTHER
- Responsible Party
- PRINCIPAL INVESTIGATOR
- PI Title
- Associate Professor
Study Record Dates
First Submitted
April 6, 2023
First Posted
April 24, 2023
Study Start
February 21, 2024
Primary Completion
May 28, 2024
Study Completion
May 28, 2024
Last Updated
June 12, 2025
Results First Posted
June 12, 2025
Record last verified: 2025-06
Data Sharing
- IPD Sharing
- Will not share