Cannabis use patterns and social and health effects in young adults
Trajectoires Individuelles de Consommation de Cannabis en Situation Habituelle et Observations de Leurs Modalités en Contexte Écologique
We will follow 18–24-year-olds who use cannabis at least weekly for two years to see if different patterns of product type, frequency, and dosage are linked to social and health outcomes.
Quick facts
| Study type | Observational |
|---|---|
| Enrollment | 350 (estimated) |
| Ages | 18 Years to 24 Years |
| Sex | All |
| Sponsor | Centre hospitalier de l'Université de Montréal (CHUM) Academic / other |
| Locations | 1 site (Montreal, Quebec) |
| Trial ID | NCT07063589 on ClinicalTrials.gov |
What this trial studies
This is a two-year observational cohort that enrolls regular cannabis users aged 18–24 and uses a mobile application to collect repeated information on frequency of use, product types, and cannabinoid dosages. Participants complete periodic surveys and mobile-based consumption logs to map how use patterns change over time. The study links these longitudinal use trajectories with social and health measures to characterize potential consequences during this developmental period. No experimental treatments are given; the project aims to generate detailed real-world data to inform prevention and harm-reduction strategies.
Who should consider this trial
Good fit: Young adults aged 18–24 who use cannabis at least one day per week, can read English or French, have a mobile phone, and are willing to comply with study procedures for two years.
Not a fit: People currently receiving or planning treatment for cannabis use disorder, those with a medical authorization for cannabis, or those who cannot commit to the study period (for example due to planned extended absence) are unlikely to benefit from participation.
Why it matters
Potential benefit: If successful, the study could identify risky consumption patterns and inform targeted prevention or harm-reduction efforts for young adults.
How similar studies have performed: Previous longitudinal studies have linked heavy youth cannabis use to adverse outcomes, but detailed multi-factor tracking of product types and cannabinoid dosages over time in this age group is relatively novel.
Eligibility criteria
Show full inclusion / exclusion criteria
Inclusion Criteria: * 18 to 24 years of age; * Cannabis use frequency of at least 1 day/week in the past three months; * Ability to speak and read French or English; * willingness to comply with all study procedures; * access to a mobile phone. Exclusion Criteria: * Planned extended absence during study period (e.g. pending legal action, surgery, incarceration, inpatient residential program) which, in the opinion of the research staff, might prevent completion of the study; * Current or anticipated treatment for cannabis use disorder, confirmed via self-report; * Medical document authorizing the use of cannabis for medical purposes; * Participation in clinical studies or undergoing other investigational procedures involving cannabis or cannabinoids administration.
Where this trial is running
Montreal, Quebec
- Centre de recherche du Centre Hospitalier Universitaire de Montréal — Montreal, Quebec, Canada (Recruiting)
Study contacts
- Principal investigator: Didier Jutras-Aswad, MD, MS — Crchum
- Study coordinator: Pamela Lachance-Touchette, Ph.D.
- Email: pamela.lachance-touchette.chum@ssss.gouv.qc.ca
- Phone: 514-890-8000
How to participate
- Review the eligibility criteria above with your treating physician.
- Visit the official trial page on ClinicalTrials.gov for the most current contact information and recruitment status.
- Contact the listed study coordinator or principal investigator to request pre-screening. Pre-screening is free and never obligates you to enroll.