Personalized Feedback Intervention to Reduce Risky Cannabis Use.

Center for Addiction and Mental Health (CAMH)

Status: Completed

Conditions: Cannabis Use

Treatments: Behavioral: Personalized Feedback; Behavioral: Education

Study type: Interventional

Funder types: Other

Identifiers

NCT04060602

143/2018

Details and patient eligibility

About

The purpose of this project is to determine whether participants who receive a personalized feedback report and educational materials about risky cannabis use will be less likely to report risky cannabis use at follow-up compared to participants who only received educational materials.

Full description

This project aims to reduce risky cannabis use among those with less severe cannabis use, most of whom will never seek formal treatment. All of the participants will receive educational material regarding risky cannabis use and its prevention. Half of the participants will also be assigned by chance to receive a personalized feedback report.

The investigators hypothesize that:

1. Participants who receive the full personalized feedback intervention will be less likely to report risky cannabis use at 3- and 6-month follow-ups compared to participants who receive educational materials only (Primary Hypothesis).
2. Participants who receive the full personalized feedback intervention will report greater reductions in their perceptions of how much others use cannabis at a 3-month follow-up compared to participants who receive educational materials only.
3. Reductions in perceptions of how much others use cannabis at 3-month follow-up will be positively associated with reduction in the participant's risky cannabis use at 6-month follow-up.

A 2-arm parallel group randomized controlled trial will be conducted to test these hypotheses with follow-ups occurring at 3 and 6 months after randomization. Online media advertisements will be used to recruit people currently using cannabis. The advertisements will be placed across Canada using locations found successful in previous trials to rapidly recruit participants (e.g. Google AdWords).

Enrollment: 747 patients

Sex: All

Ages: 18 to 99 years old

Volunteers: No Healthy Volunteers

Inclusion criteria

• Score of 4 or more on the Alcohol, Smoking, and Substance Involvement Screening Test, Cannabis subscale (ASSIST)

Exclusion criteria

• Being under 18 years of age

Trial design

Primary purpose: Treatment

Allocation: Randomized

Interventional model: Parallel Assignment

Masking: Double Blind

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747 participants in 2 patient groups

Personalized Feedback and Education

Experimental group

Description:

This arm is provided personalized feedback concerning their cannabis use in addition to educational materials about risky cannabis use.

Treatment:

Behavioral: Education

Behavioral: Personalized Feedback

Education

Active Comparator group

Description:

This arm is provided educational materials about risky cannabis use.

Treatment:

Behavioral: Education