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Cannabis UseJointEffortNCT05099016

Joint Effort Study

A study testing Joint Effort and Brief normative feedback and standard information in people with Cannabis Use, run by Centre hospitalier de l'Université de Montréal (CHUM) at 1 site in Canada.

Completed

Finished. The study has ended and is not enrolling. Results may be posted on the official record.

Official record
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Trial summary

This pilot randomized controlled trial (RCT) will be conducted to evaluate the acceptability and feasibility of a digital tailored prevention tool (i.e., the Joint Effort mobile application) aimed at supporting university-level students into taking action on their cannabis use. Read more about this study

Who is it for?
Ages 18 to 30 yearsHealthy volunteers can take part
Conditions the study is for
Cannabis Use
What is being tested?
Joint Effort and Brief normative feedback and standard information
Could I receive a placebo?
No, everyone receives an active treatment
How many people
99 participants
Where
1 siteCanada
Study dates
15 Nov 2021to 31 Jul 2022
Phase
Interventional
Are there results?
None posted in the registry

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 30 years
  • All sexes
  • Healthy volunteers accepted
  • Adult

Who may be able to join

  • active cannabis user (i.e., having used cannabis at least once in the past month)
  • able to understand French
  • own an iPhone (running on iOS 13 or higher).

Who cannot join

None listed.

Trial locations and contacts

1 site in 1 country.

Canada1 site

  • Université de Montréal

    Montreal

Other trials in Canada

About this study

Official title: Taking Action to Better Manage Cannabis Use Among Young Adults: Preliminary Evaluation of a Digital Tailored Prevention Tool With a Pilot Randomized Control Trial

This pilot randomized controlled trial (RCT) will be conducted to evaluate the acceptability and feasibility of a digital tailored prevention tool (i.e., the Joint Effort mobile application) aimed at supporting university-level students into taking action on their cannabis use. The two main objectives of the proposed study are:

  1. To assess the acceptability of the Joint Effort mobile application in terms of uptake, engagement and intervention appreciation.
  2. To document the feasibility of the study processes in terms of online recruitment rate, adherence to online data collection methods, and attrition rate.
Conditions
Cannabis Use
Being tested
Joint Effort, Brief normative feedback and standard information

What participants receive

What participants receive. In a randomised study each person is assigned to one group by chance.

  • Joint EffortOther

    The Joint Effort intervention is available in the form of an iPhone mobile application (running on iOS 13 and 14) in French language. It aims to support young adults in school who have used cannabis in the past month into taking action on their cannabis use.

  • Brief normative feedback and standard informationOther

    The brief normative feedback is based on the frequency of cannabis use use. Participants will also be offered basic reliable non personalized information on lower-risk cannabis use in the form of official public websites.

Study groups in NCT05099016
Study groupRoleWhat they receive
Joint Effort (mobile application)ExperimentalThe Joint Effort mobile application aims to support young adults into taking action on their cannabis use. Based on the Theory of Planned Behaviour, the content focuses on intention, attitude and perceived behavioral control. Various intervention methods and strategies are used to address these determinants (e.g., personalized feedback, persuasive communication, self-observation and activation of intention). The objectives includes: to allow the individual to become aware (or more aware) of their cannabis use, to support the individual's decision-making process of taking action on their cannabis use, to guide and support the establishment and sustainability of an action plan. An optional logbook-type feature (weekly journal of cannabis use) allows personalized monitoring and data collection throughout the course of the intervention.
Receives: Other: Joint Effort
Brief normative feedback and standard informationActive comparatorThe comparator is composed of a a brief normative feedback regarding last month frequency of cannabis use and basic reliable non personalized information on lower-risk cannabis use (official public websites).
Receives: Other: Brief normative feedback and standard information

What is being measured

The primary outcome is the main question the study is designed to answer.

  1. Uptake of the developed mobile application (acceptability)

    Uptake is defined as the act of downloading and installing the mobile application (Szinay, Jones, Chadborn, Brown, \& Naughton, 2020). The uptake rate will measure the proportion of participants randomized to the EG group that downloaded the mobile application (via the Apple iOS App Store) versus those who did not do it.

    Measured: 6 months

  2. Subjective engagement with the developed mobile application (acceptability)

    Subjective engagement (self-reported) will be measured by using the validated French version (Fontaine et al., 2020) of the User Engagement Scale - Short Form (UES-SF)(O'Brien et al., 2018). This 12-item instrument serves to measure four dimensions of engagement: 1) aesthetic appeal; 2) focused attention; 3) perceived usability; and 4) reward factor. Possible answers range from strongly disagree (+1) to strongly agree (+5). The possible total score ranges between 12 and 60. The score for each item will be interpreted and the scores for each dimensions will be compared to indicate which are rated more highly than other.

    Measured: 4-weeks post baseline

  3. Objective engagement with the developed mobile application (acceptability)

    Objective engagement (ie. number of screens viewed by participants) will be assessed. This data will be collected automatically when users log into the application.

    Measured: 6 months

  4. Mobile application appreciation (acceptability)

    The intervention appreciation will be measured with the User Version of the Mobile Application Rating Scale (uMARS) (Stoyanov, Hides, Kavanagh, \& Wilson, 2016). The uMARS is a 20-item measure that includes 4 objective quality subscales regarding engagement, functionality, aesthetics, and information quality and 1 subjective quality subscale. Each item is rated on a 5-point scale ranging from inadequate (+1) to excellent (+5). The possible total score ranges between 20 and 100; a higher scores indicates a higher appreciation.

    Measured: 2-weeks post baseline

Secondary outcomes (3)

  1. Online recruitment rate (feasibility of the study processes)

    The recruitment rate (ie. number of participants who signed the inform consent form) will be assessed.

    Measured: 6 months

  2. Adherence to data collection methods (feasibility of the study processes)

    The adherence to data collection methods (ie. number of missing data) will be assessed.

    Measured: baseline, 4-weeks post baseline, 8-weeks post baseline

  3. Attrition rate (feasibility of the study processes)

    The attrition rate will be measured by taking into account the proportion of participants who completed only the baseline but no follow-up assessment (study dropouts). The proportion of participants who completed the baseline assessment and only one follow-up and the proportion of study completers (who completed all assessments) will also be determined. Loss-to-follow up in both intervention groups will be compared (experimental VS control groups).

    Measured: 6 months

Timeline

From the start of the study to its completion; the mark is today. Estimated dates are the sponsor’s plan.

  1. First posted29 Oct 2021
  2. Study start15 Nov 2021
  3. Primary completion30 Apr 2022
  4. Study completion31 Jul 2022

Resources

More details

For doctors and researchers: how the study is designed, who runs it, and its registry IDs.

Study design
Study type
Interventional
Phase
Phase N/A
Primary purpose
Supportive care
Allocation
Randomised
Intervention model
Parallel groups
Masking
None (open label)
Enrolment
99 participants (actual)
IDs, dates and publications
ClinicalTrials.gov ID
NCT05099016
Sponsor's protocol ID
21.196
Acronym
JointEffort
Status last verified
Aug 2021
First submitted
31 Aug 2021
Last updated
25 Aug 2022
Results posted
No
Data monitoring committee
Yes
FDA-regulated drug
No
FDA-regulated device
No
Individual data sharing
No

Publications

  • Cote J, Chicoine G, Auger P, Vinette B, Rouleau G, Maheu-Cadotte MA, Page MG, Lapierre J, Lal S, Genest C, Fontaine G, Cossette S, Cheng J, Jutras-Aswad D. Acceptability, Feasibility, and Outcome Responsiveness of the Joint Effort Mobile App for Promoting Lower-Risk Cannabis Use Among Young Adults: Pilot Randomized Controlled Trial. JMIR Mhealth Uhealth. 2026 May 28;14:e71957. doi: 10.2196/71957.

    PubMed 42208065

Questions about this trial

What is this clinical trial studying?

A study testing Joint Effort and Brief normative feedback and standard information in people with 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 3 inclusion and 0 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: finished, as of the sponsor's last update on 25 Aug 2022. 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?

The study is completed, but results are not available in the source record. That does not mean the treatment did or did not work.

How can a doctor refer a patient or contact the research team?

The record lists no contact. The official record names the sponsor, who can be asked directly. AzTrials does not enrol participants or take referrals.

What does the primary outcome measure?

Uptake of the developed mobile application (acceptability) (time frame: 6 months). The study lists 4 primary outcomes in all. It is what the study was designed to measure, not a finding.

Where can I read the original study information?

On the ClinicalTrials.gov record for NCT05099016, which also lists 1 linked publication.

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 25 Aug 2022.

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