Cannabis, Linked Emotions, and Adolescent Risk Study
Purpose
The goal of this study is to disentangle relationships between acute cannabis use and withdrawal on proximal depression and suicide risk and recovery in adolescents ages 12-18 years by incorporating time-varying patterns of substance use, mood, and SI. This project aims to guide the development of scalable, individualized, accessible, and affordable interventions aimed to reduce depression and suicide risk among adolescents.
Conditions
- Cannabis Use
- Depression
- Suicidal Ideation
- Adolescent Behavior
Eligibility
- Eligible Ages
- Between 12 Years and 18 Years
- Eligible Genders
- All
- Accepts Healthy Volunteers
- No
Inclusion Criteria
- Ages 12-18; - Current daily or near daily cannabis use (i.e., use ≥ 4 days per week on average; Timeline Followback); - Score ≥ 5 on PHQ-9 (telephone screener) or current depressive episode (Mini International Neuropsychiatric Interview Kid 7.0.2); - Current or recent (past month) SI (passive or active), plan, or attempt (Self-Injurious Thoughts and Behaviors Interview) (Nock et al., 2007); - Access to an internet-capable smartphone (iOS or Android); - Provision of at least 1 collateral contact for risk monitoring; - Provision of informed assent (or consent if 18 years or older) and parent/guardian consent if <age 18; - Greater than 60% response rate to EMA prompts during the first EMA phase; - No immediate plan to discontinue cannabis use in the next 3 months; - Positive toxicology result for cannabis on baseline urinalysis.
Exclusion Criteria
- Any factor that impairs ability to comprehend and effectively participate, including acute intoxication at time of consent; - Cannabis use >4 times/day on average (to maximize likelihood of capturing mood and SI during non-use times); - Inability to speak/write English fluently; - Gross cognitive impairment, for example due to florid psychosis, intellectual disability, developmental delay, or neurodegenerative disease; - Current epilepsy diagnosis; - Individuals who are under the legal protection of the government or state (wards of the state); - Response of "No" to the knowledge check question regarding EMA suicidality response time; - Inability to wear Fitbit device.
Study Design
- Phase
- N/A
- Study Type
- Interventional
- Allocation
- Randomized
- Intervention Model
- Parallel Assignment
- Intervention Model Description
- Following a shared two-week baseline assessment period (Arm 1) for all enrolled participants, participants will be split into 2 arms, randomly assigned to one of two interventions (Arms 2 or 3, CB-Abst or CB-Mon).
- Primary Purpose
- Basic Science
- Masking
- Single (Outcomes Assessor)
Arm Groups
| Arm | Description | Assigned Intervention |
|---|---|---|
|
Experimental Cannabis Abstinence (CB-Abst) |
Those randomized to the abstinence condition will be asked to stop using cannabis for eight weeks. They will participate in a contingency management protocol, which uses an escalating remuneration schedule to incentivize abstinence. Abstinence is confirmed biochemically via progressively decreasing values of creatinine-adjusted THCCOOH. |
|
|
No Intervention Cannabis Monitoring (CB-Mon) |
Those randomized to the monitoring condition will be asked to make no changes to their cannabis use frequency or dose for the duration of the eight week study. |
|
|
No Intervention Pre-intervention Pooled Groups (EMA Phase 1 Only) |
All enrolled participants will participate in approximately two weeks of EMA data collection prior to being randomized and starting intervention procedures to characterize mood during baseline use as usual (CB-Abst or CB-Mon). |
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Recruiting Locations
More Details
- Status
- Recruiting
- Sponsor
- Massachusetts General Hospital
Detailed Description
We will recruit 200 community-based adolescents, ages 12-18 years, with daily or near daily cannabis use, current depression, and past month SI. Participants will be enrolled in a 10-week, 3-phased, mixed-methods protocol. All participants will complete a 2 week baseline phase (Phase 1) involving real-time, ambulatory smartphone monitoring (ecological momentary assessment; EMA) during which they will use cannabis per usual to quantify the temporal relationship between use and mood and SI, and the within- (e.g., concurrent other substance use, social context of use) and between-subject factors (e.g., severity of cannabis use, depression and SI) that moderate these linkages. We will work with participants schedule to ensure that the start of this 2-week baseline phase coincides with when they do not anticipate any major deviations from their typical pattern of cannabis use (e.g., family vacation, exam week). After the baseline phase, participants will be scheduled for the randomization component of the study, which will employ a 2-arm, within-subject, parallel group design to examine the effects of short- and longer-term cannabis withdrawal across 8 weeks of cannabis abstinence on depression and SI. Participants will be randomized to 8 weeks of abstinence with contingency management (CB-Abst; n=100) or non-contingent monitoring with no abstinence requirement (CBMon; n=100). Randomization will occur in a 1:1 ratio in blocks of 6 based on a computerized scheme developed by the study statistician. Randomization will be stratified by age, sex, and depression severity. A key aspect of the approach is that the 8-week period is long enough to observe true changes due to cannabis discontinuation, separate from effects of cannabis withdrawal, and residual cannabinoid exposure. Both groups will complete 1-week of EMA in weeks 1 (Phase 2) and 8 (Phase 3) of the randomized study period. In addition to the 3 waves of smartphone, EMA data collection, participants will complete 12 study visits across ~10 weeks. Visits will entail collection of urine samples for verification of self-reported use and abstinence verification (for CB-Abst during the randomization phase), as well as brief questionnaires and interviews on interim substance use, craving, withdrawal, mood symptoms, and SI.
