NCT07524985

Brief Summary

This study aims to evaluate a mobile app designed to promote the safe use of cannabis among adult users in Quebec.

Trial Health

77
On Track

Trial Health Score

Automated assessment based on enrollment pace, timeline, and geographic reach

Enrollment
110

participants targeted

Target at P50-P75 for not_applicable

Timeline
9mo left

Started Apr 2026

Geographic Reach
1 country

1 active site

Status
recruiting

Health score is calculated from publicly available data and should be used for screening purposes only.

Trial Relationships

Click on a node to explore related trials.

Study Timeline

Key milestones and dates

Study Progress14%
Apr 2026Apr 2027

First Submitted

Initial submission to the registry

April 2, 2026

Completed
11 days until next milestone

First Posted

Study publicly available on registry

April 13, 2026

Completed
17 days until next milestone

Study Start

First participant enrolled

April 30, 2026

Completed
11 months until next milestone

Primary Completion

Last participant's last visit for primary outcome

April 1, 2027

Expected
Same day until next milestone

Study Completion

Last participant's last visit for all outcomes

April 1, 2027

Last Updated

June 3, 2026

Status Verified

June 1, 2026

Enrollment Period

11 months

First QC Date

April 2, 2026

Last Update Submit

June 1, 2026

Conditions

Cannabis Use

Outcome Measures

Primary Outcomes (1)

  • Protective Behavioral Strategies for Marijuana

    Adoption of Protective Behavioral Strategies; measured with the Protective Behavioral Strategies for Marijuana scale (PBSM-17). The French version of the questionnaire translated by Côté et al. (2021) will be used. The 17 items each represent a behavioral protection strategy. They are measured in terms of frequency of use on a six-point Likert-type scale (never, rarely, occasionally, sometimes, often and always). The total score of the PBSM-17 is obtained by calculating the total score of each item and then converting this raw score into a standardized form (T-score) ranging from 15 to 73. The lower the total score, the lesser the use of PBS.

    Baseline, 2-weeks, 4-weeks

Secondary Outcomes (3)

  • Intention to take action

    Baseline, 2-weeks, 4-weeks

  • Cannabis use frequency

    Baseline, 4-weeks

  • Severity of Dependence

    Baseline

Other Outcomes (1)

  • Engagement

    2-weeks post-intervention usage

Study Arms (2)

Joint Effort

EXPERIMENTAL

Mobile application

Other: Joint Effort

Brief normative feedback and standard information

ACTIVE COMPARATOR

Webpage

Other: Brief normative feedback and standard information

Interventions

Brief normative feedback and standard informationOTHER

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

Brief normative feedback and standard information
Joint EffortOTHER

The Joint Effort intervention is available as an iPhone mobile application in French language. It aims to support cannabis users to take action upon their cannabis use.

Joint Effort

Eligibility Criteria

Age18 Years+
Sexall
Healthy VolunteersYes
Age GroupsAdult (18-64), Older Adult (65+)

You may qualify if:

  • Aged 18 years old or older
  • Be an active non-medical cannabis user (ie. self reported past month usage)
  • Understand, read and write French
  • Own a smartphone (iPhone)

You may not qualify if:

  • None

Contact the study team to confirm eligibility.

Sponsors & Collaborators

Study Sites (1)

Université de Montréal

Montreal, Quebec, Canada

RECRUITING

Study Officials

  • Didier Jutras-Aswad

    Université de Montréal

    PRINCIPAL INVESTIGATOR

  • Sylvie Cossette

    Université de Montréal

    PRINCIPAL INVESTIGATOR

  • Christine Genest

    Université de Montréal

    PRINCIPAL INVESTIGATOR

  • Shalini Lal

    Université de Montréal

    PRINCIPAL INVESTIGATOR

  • Judith Lapierre

    Laval University

    PRINCIPAL INVESTIGATOR

  • Gabrielle Pagé

    Université de Montréal

    PRINCIPAL INVESTIGATOR

  • Jinghui Cheng

    Polytechnique Montréal

    PRINCIPAL INVESTIGATOR

Central Study Contacts

José Côté, PhD

CONTACT

514-890-8000jose.cote@umontreal.ca

Study Design

Study Type
interventional
Phase
not applicable
Allocation
RANDOMIZED
Masking
TRIPLE
Who Masked
PARTICIPANT, INVESTIGATOR, OUTCOMES ASSESSOR
Purpose
PREVENTION
Intervention Model
PARALLEL
Sponsor Type
OTHER
Responsible Party
SPONSOR

Study Record Dates

First Submitted

April 2, 2026

First Posted

April 13, 2026

Study Start

April 30, 2026

Primary Completion (Estimated)

April 1, 2027

Study Completion (Estimated)

April 1, 2027

Last Updated

June 3, 2026

Record last verified: 2026-06

Data Sharing

IPD Sharing
Will not share

Locations

CA(1)