Cannabis Use
Conditions
Keywords
Cannabis Use, Marijuana, Substance-Related Disorders, Mental Disorders
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.
Interventions
OTHERJust-In-Time-Adaptive-Intervention (JITAI)
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.
Sponsors
National Institute on Drug Abuse (NIDA)
University of Michigan
Study design
Allocation
NA
Intervention model
SINGLE_GROUP
Primary purpose
OTHER
Masking
NONE
Eligibility
Sex/Gender
ALL
Age
18 Years to 25 Years
Healthy volunteers
No
Inclusion criteria
* 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)
Exclusion criteria
* Use of Medical Cannabis * Failure to meet study verification criteria
Design outcomes
Primary
| Measure | Time frame | Description |
|---|---|---|
| App Feasibility | 1 month | % of participants who consented to the study who download the MiWaves app. |
| App Acceptability | 1 month | Participants will complete acceptability ratings for the MiWaves app within their post-test assessment (percent with positive rating). |
Countries
United States
Participant flow
Participants by arm
| Arm | Count |
|---|---|
| JITAI Experimental: 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.
Just-In-Time-Adaptive-Intervention (JITAI): 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. | 122 |
| Total | 122 |
Baseline characteristics
| Characteristic | JITAI |
|---|---|
| Age, Categorical <=18 years | 7 Participants |
| Age, Categorical >=65 years | 0 Participants |
| Age, Categorical Between 18 and 65 years | 115 Participants |
| Age, Continuous | 21.7 years STANDARD_DEVIATION 2 |
| Ethnicity (NIH/OMB) Hispanic or Latino | 19 Participants |
| Ethnicity (NIH/OMB) Not Hispanic or Latino | 103 Participants |
| Ethnicity (NIH/OMB) Unknown or Not Reported | 0 Participants |
| Race (NIH/OMB) American Indian or Alaska Native | 0 Participants |
| Race (NIH/OMB) Asian | 6 Participants |
| Race (NIH/OMB) Black or African American | 12 Participants |
| Race (NIH/OMB) More than one race | 14 Participants |
| Race (NIH/OMB) Native Hawaiian or Other Pacific Islander | 0 Participants |
| Race (NIH/OMB) Unknown or Not Reported | 1 Participants |
| Race (NIH/OMB) White | 89 Participants |
| Region of Enrollment United States | 122 participants |
| Sex: Female, Male Female | 65 Participants |
| Sex: Female, Male Male | 57 Participants |
Adverse events
| Event type | EG000 affected / at risk |
|---|---|
| deaths Total, all-cause mortality | 0 / 122 |
| other Total, other adverse events | 0 / 122 |
| serious Total, serious adverse events | 0 / 122 |
Outcome results
Primary
App Acceptability
Participants will complete acceptability ratings for the MiWaves app within their post-test assessment (percent with positive rating).
Time frame: 1 month
| Arm | Measure | Value (COUNT_OF_PARTICIPANTS) |
|---|---|---|
| JITAI | App Acceptability | 90 Participants |
Primary
App Feasibility
% of participants who consented to the study who download the MiWaves app.
Time frame: 1 month
Population: App feasibility outcome is operationalized as % of participants who consented to the study who download the MiWaves app. Not all that consented to the study were included in study flow since not all that consented downloaded the app. Therefore, the number analyzed for app feasibility is greater than the number in the participant flow.
| Arm | Measure | Value (COUNT_OF_PARTICIPANTS) |
|---|---|---|
| JITAI | App Feasibility | 122 Participants |