Cannabis UseTRICCHOMENCT07063589
Cannabis Use Patterns Among Young Adults and Associations With Social and Health Outcomes.
An observational study of Cannabis Use, run by Centre hospitalier de l'Université de Montréal (CHUM) at 1 site in Canada.
Trial summary
The purpose of this study is to identify and characterize patterns of non-therapeutic cannabis consumption and their variation in time in regular/daily users aged 18-24 years using a multi-factor approach (frequency of use, product types, cannabinoid dosages) over a two-year period. Read more about this study
- Who is it for?
- Ages 18 to 24 yearsHealthy volunteers can take part
- Conditions the study is for
- Cannabis Use
- What is being tested?
- Mobile application
- How many people
- 350 participants
- Where
- 1 siteCanada
- Study dates
- 16 Sep 2025to Aug 2027
- Phase
- Observational
- Are there results?
- Not yet: the study is under way
Key requirements
Who can take part, as listed by the sponsor. Only the study team can confirm whether you are eligible, so take this list to your doctor.
- Ages 18 to 24 years
- All sexes
- Healthy volunteers accepted
- Adult
Study population: The target population for TRICCHOME is young adults between 18 and 24 years of age, who use cannabis regularly or daily.
Who may be able to join
- 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.
Who cannot join
- 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.
Trial locations and contacts
1 site in 1 country. Contact the study team or a site near you to ask about taking part.
Pamela Lachance-Touchette, Ph.D. contact
François-Olivier Hébert, Ph.D. contact
Canada1 site, 1 recruiting
- Recruiting
Centre de recherche du Centre Hospitalier Universitaire de Montréal
Montreal, Quebec, H2X0A9
Pamela Lachance-Touchette, Ph.D, 514 995 5338, pamela.lachance-touchette.chum@ssss.gouv.qc.ca
Isabelle Boisvert, Ba., 514 890 8000 ext. 30411, isabelle.boisvert.ib.chum@ssss.gouv.qc.ca
About this study
Official title: Trajectoires Individuelles de Consommation de Cannabis en Situation Habituelle et Observations de Leurs Modalités en Contexte Écologique
The purpose of this study is to identify and characterize patterns of non-therapeutic cannabis consumption and their variation in time in regular/daily users aged 18-24 years using a multi-factor approach (frequency of use, product types, cannabinoid dosages) over a two-year period.
Read the detailed description
Changes in the legal status of cannabis in Canada have highlighted the need for knowledge about the substance and its effects at individual, population and societal levels. In Quebec, in the past year, one in four cannabis users reported weekly use, and around 15% reported daily use. More specifically, young people between the ages of 18 and 24 account for the largest proportion of this consumption, representing a large proportion of these regular to daily users. Little information is currently available about the correlates, evolution and effects of regular, daily cannabis use in this age group, despite the fact that it is the most widely used in the province.
Such comprehensive longitudinal data on consumption dynamics within this population is crucial for our understanding of whether and how cannabis use trajectories vary over time, characterizing the health and social consequences of cannabis consumption at this critical stage in human development, and ultimately providing evidence for the development of strategies to prevent and mitigate potential harms to this specific population.
- Conditions
- Cannabis Use
- Being tested
- Mobile application
What participants receive
What participants receive. In a randomised study each person is assigned to one group by chance.
Mobile applicationOther
Cannabis use patterns and their resulting subjective experiences, along with social and health-related correlates will be collected in real time using a mobile application specifically designed for this study by a local custom software development company (Osedea, Montreal).
What is being measured
The primary outcome is the main question the study is designed to answer.
Cannabis use patterns
Primary outcome measures of this study are specific assessments of cannabis use patterns, measured at baseline and daily using the mobile app. Primary outcome assessments related to cannabis use patterns will be tracked daily, taking advantage of a short but detailed series of questions taking approximately 1-5 minutes to answer, depending on the number of consumption events during the day. Participants will be advised to provide information even during non-consumption days, which in these cases will be limited to their general appreciation of the day, in addition to the fact that they did not consume that day. Participants will be able to retrospectively enter daily cannabis consumption data up to a maximum of seven days in the past, to minimize recall bias.
Measured: Baseline
Trajectories of consumption patterns over time_Route of administration
The investigators will use weekly reports on participants' habits surrounding cannabis use in the form of logbook entries, covering the route of administration for each product. This information will be collected for each consumption session during a use day.
Measured: From baseline (Day 1) up to two year (Day 730)
Trajectories of consumption patterns over time_product type
The investigators will use weekly reports on participants' habits surrounding cannabis use in the form of logbook entries, covering the product type for each product. This information will be collected for each consumption session during a use day.
Measured: From baseline (Day 1) up to two year (Day 730)
Trajectories of consumption patterns over time_THC constituent (%)
The investigators will use weekly reports on participants' habits surrounding cannabis use in the form of logbook entries, covering the THC constituent (%) for each product. This information will be collected for each consumption session during a use day.
Measured: From baseline (Day 1) up to two year (Day 730)
Trajectories of consumption patterns over time_CBD constituent (%)
The investigators will use weekly reports on participants' habits surrounding cannabis use in the form of logbook entries, covering the CBD constituent (%) for each product. This information will be collected for each consumption session during a use day.
Measured: From baseline (Day 1) up to two year (Day 730)
Trajectories of consumption patterns over time_amount per use
The investigators will use weekly reports on participants' habits surrounding cannabis use in the form of logbook entries, covering the amount per use for each product. This information will be collected for each consumption session during a use day.
Measured: From baseline (Day 1) up to two year (Day 730)
Trajectories of consumption patterns over time_supply source
The investigators will also capture information on supply source (choices are: cultivated by me or for me, family member or friend or acquaintance, SQDC, legal source from another province, health Canada licensed producer, illegal market) for each product used in the logbook.
Measured: From baseline (Day 1) up to two year (Day 730)
Secondary outcomes (2)
Socio-demographic and behavioral determinants
In addition to the information contained in the weekly logbook entries, for each cannabis use event we will collect socio-demographic variables to identify patterns of cannabis consumption.
Based on this multi-factor approach, we hypothesize that users will fall into distinct clusters of consumption patterns (e.g., stable, chaotic/variable patterns, etc.), which will each be associated with specific psychosocial determinants and health outcomes.
Measured: From baseline (Day 1) up to two year (Day 730) and from week 1 to week 104 and every 4 months (Weeks16, 32, 48, 64, 96)
Socio-demographic and behavioral determinants
In addition to the information contained in the weekly logbook entries, for each cannabis use event and every four months, various social and health measures will be collected with the mobile application.
Based on this multi-factor approach, we hypothesize that users will fall into distinct clusters of consumption patterns (e.g., stable, chaotic/variable patterns, etc.), which will each be associated with specific psychosocial determinants and health outcomes.
Measured: At Weeks 16, 32, 48, 64 and 96
Timeline
From the start of the study to its completion; the mark is today. Estimated dates are the sponsor’s plan.
- First posted14 Jul 2025
- Study start16 Sep 2025
- Primary completionAug 2027 (estimated)
- Study completionAug 2027 (estimated)
Resources
- Official record on ClinicalTrials.govThe registry entry this page is built from, with its full change history.
- Other trials for Cannabis UseStudies of the same condition, open and under way.
- More trials run by Centre hospitalier de l'Université de Montréal (CHUM)The sponsor's other registered studies.
- What the trial phases meanHow a treatment moves from first tests in people to approval.
More details
For doctors and researchers: how the study is designed, who runs it, and its registry IDs.
Study design
- Study type
- Observational
- Observational model
- Cohort
- Time perspective
- Prospective
- Enrolment
- 350 participants (estimated)
Sponsor and investigators
- Sponsor type
- University, hospital or other
- Responsible party
- Sponsor
- Investigators
- Didier Jutras-Aswad, MD, MS, Principal investigator, CRCHUM
IDs, dates and publications
- ClinicalTrials.gov ID
- NCT07063589
- Sponsor's protocol ID
- 2025-12297
- Other IDs
- 2025
- Acronym
- TRICCHOME
- Status last verified
- Dec 2025
- First submitted
- 12 May 2025
- Last updated
- 24 Dec 2025
- Results posted
- No
- Data monitoring committee
- Yes
- FDA-regulated drug
- No
- FDA-regulated device
- No
Study at a glance
From the registry record, last updated by the sponsor on 24 Dec 2025. Recruitment status is as the sponsor reported it: confirm with the study team.
- Official title
- Trajectoires Individuelles de Consommation de Cannabis en Situation Habituelle et Observations de Leurs Modalités en Contexte Écologique
- ClinicalTrials.gov ID
- NCT07063589
- Acronym / sponsor ID
- TRICCHOME / 2025-12297
- Conditions
- Cannabis Use
- Study type
- Observational
- Recruitment status
- Recruiting
- Enrolment
- 350 participants (estimated)
- Lead sponsor
- Centre hospitalier de l'Université de Montréal (CHUM)University, hospital or other
- Study start
- 16 Sep 2025 (actual)
- Primary completion
- Aug 2027 (estimated)
- Study completion
- Aug 2027 (estimated)
- First posted
- 14 Jul 2025 (actual)
- Results
- Not posted in the source record
Clinical summary
The research question as the sponsor registered it. This describes what the study plans to test, not what it found.
The purpose of this study is to identify and characterize patterns of non-therapeutic cannabis consumption and their variation in time in regular/daily users aged 18-24 years using a multi-factor approach (frequency of use, product types, cannabinoid dosages) over a two-year period.
Detailed description
Changes in the legal status of cannabis in Canada have highlighted the need for knowledge about the substance and its effects at individual, population and societal levels. In Quebec, in the past year, one in four cannabis users reported weekly use, and around 15% reported daily use. More specifically, young people between the ages of 18 and 24 account for the largest proportion of this consumption, representing a large proportion of these regular to daily users. Little information is currently available about the correlates, evolution and effects of regular, daily cannabis use in this age group, despite the fact that it is the most widely used in the province.
Such comprehensive longitudinal data on consumption dynamics within this population is crucial for our understanding of whether and how cannabis use trajectories vary over time, characterizing the health and social consequences of cannabis consumption at this critical stage in human development, and ultimately providing evidence for the development of strategies to prevent and mitigate potential harms to this specific population.
Study design
- Observational model
- Cohort
- Time perspective
- Prospective
Who may qualify
- Ages
- 18 to 24 years
- Sex
- All
- Healthy volunteers
- Accepted
- Age groups
- Adult
- Study population
- The target population for TRICCHOME is young adults between 18 and 24 years of age, who use cannabis regularly or daily.
Key inclusion criteria (5 listed)
- 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.
Key exclusion criteria (4 listed)
- 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.
Eligibility is decided by the study team after screening; this overview does not establish that a patient qualifies. Full inclusion and exclusion criteria.
Interventions
| Intervention | Type | Arms |
|---|---|---|
| Mobile applicationCannabis use patterns and their resulting subjective experiences, along with social and health-related correlates will be collected in real time using a mobile application specifically designed for this study by a local custom software development company (Osedea, Montreal). | Other | – |
Primary outcome
Cannabis use patterns
Time frame: Baseline
Primary outcome measures of this study are specific assessments of cannabis use patterns, measured at baseline and daily using the mobile app. Primary outcome assessments related to cannabis use patterns will be tracked daily, taking advantage of a short but detailed series of questions taking approximately 1-5 minutes to answer, depending on the number of consumption events during the day. Participants will be advised to provide information even during non-consumption days, which in these cases will be limited to their general appreciation of the day, in addition to the fact that they did not consume that day. Participants will be able to retrospectively enter daily cannabis consumption data up to a maximum of seven days in the past, to minimize recall bias.
Trajectories of consumption patterns over time_Route of administration
Time frame: From baseline (Day 1) up to two year (Day 730)
The investigators will use weekly reports on participants' habits surrounding cannabis use in the form of logbook entries, covering the route of administration for each product. This information will be collected for each consumption session during a use day.
Trajectories of consumption patterns over time_product type
Time frame: From baseline (Day 1) up to two year (Day 730)
The investigators will use weekly reports on participants' habits surrounding cannabis use in the form of logbook entries, covering the product type for each product. This information will be collected for each consumption session during a use day.
Trajectories of consumption patterns over time_THC constituent (%)
Time frame: From baseline (Day 1) up to two year (Day 730)
The investigators will use weekly reports on participants' habits surrounding cannabis use in the form of logbook entries, covering the THC constituent (%) for each product. This information will be collected for each consumption session during a use day.
Trajectories of consumption patterns over time_CBD constituent (%)
Time frame: From baseline (Day 1) up to two year (Day 730)
The investigators will use weekly reports on participants' habits surrounding cannabis use in the form of logbook entries, covering the CBD constituent (%) for each product. This information will be collected for each consumption session during a use day.
Trajectories of consumption patterns over time_amount per use
Time frame: From baseline (Day 1) up to two year (Day 730)
The investigators will use weekly reports on participants' habits surrounding cannabis use in the form of logbook entries, covering the amount per use for each product. This information will be collected for each consumption session during a use day.
Trajectories of consumption patterns over time_supply source
Time frame: From baseline (Day 1) up to two year (Day 730)
The investigators will also capture information on supply source (choices are: cultivated by me or for me, family member or friend or acquaintance, SQDC, legal source from another province, health Canada licensed producer, illegal market) for each product used in the logbook.
2 secondary outcomes
Socio-demographic and behavioral determinants
Time frame: From baseline (Day 1) up to two year (Day 730) and from week 1 to week 104 and every 4 months (Weeks16, 32, 48, 64, 96)
Socio-demographic and behavioral determinants
Time frame: At Weeks 16, 32, 48, 64 and 96
Results and safety
This study is still under way. Results are not available in the source record yet.
Research links
- Official record on ClinicalTrials.govLast updated by the sponsor 24 Dec 2025.
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Referral and contact
AzTrials does not enrol participants or take referrals. Contact the study team or a site listed below; they decide who can take part.
Pamela Lachance-Touchette, Ph.D. contact
François-Olivier Hébert, Ph.D. contact
Didier Jutras-Aswad, MD, MS principal investigator
CRCHUM
1 site in 1 country: see every site and its status.
Questions about this trial
What is this clinical trial studying?
An observational study of Cannabis Use, run by Centre hospitalier de l'Université de Montréal (CHUM) at 1 site in Canada.
The full registered description is in the About this study section and the official record.
Who may be eligible to take part?
The sponsor lists 5 inclusion and 4 exclusion criteria. Eligibility is decided by the study team after screening, so read the full criteria and contact a listed site.
Is this clinical trial currently recruiting?
The record says: looking for participants now, as of the sponsor's last update on 24 Dec 2025. Status can change between updates, so confirm with the study contact before making plans.
Where is the study taking place?
The record lists 1 site in Canada. Whether a site is taking part right now should be confirmed with that site. See every site.
What are the possible benefits and risks?
They depend on the study and the treatment, and no study can promise a benefit. The study team explains the known risks during informed consent, before anyone joins; the record itself does not list them.
Are results available for this study?
This study is still under way. Results are not available in the source record yet.
How can a doctor refer a patient or contact the research team?
Contact Pamela Lachance-Touchette, Ph.D. (514-890-8000 ext. 30938, pamela.lachance-touchette.chum@ssss.gouv.qc.ca), or a site near the patient. AzTrials does not enrol participants or take referrals.
What does the primary outcome measure?
Cannabis use patterns (time frame: Baseline). The study lists 7 primary outcomes in all. It is what the study was designed to measure, not a finding.
Where can I read the original study information?
Does a listing mean the treatment is approved or proven to work?
No. A listing means the study is registered. It does not show that the treatment is safe, works, or is approved by a regulator.
How often is this information updated?
AzTrials copies changed records from ClinicalTrials.gov every night and reloads the whole registry every week. The sponsor last updated this record on 24 Dec 2025.