Health TrialsbyHealthPanel

A Mobile App to Reduce and/or Quit Cannabis Use

ConditionCannabis Dependence
Trial statusRecruiting
Trial phaseNot applicable
Trial typeInterventional
Biological sexAll
Age18-30
SponsorAlba González-Roz, PhD

About this trial

This study aims to develop an App-based intervention (CANQUIT) aimed at regular cannabis users. The efficacy of this intervention will be evaluated in the short-term (1-month follow-up) and long-term (3- and 6-months follow-ups) using a sample of 120 participants. Participants will be randomly assigned to the experimental arm (App-assisted CBT-based intervention) or the control (App-assisted self-help guide). The study will also estimate the economic impact of the intervention by considering the benefit-cost ratio (BCR) and net benefit (in €) associated with the total cost of the program. The goal is to provide evidence that can inform policy decisions regarding cannabis use and minimize the negative consequences on the physical and mental health of young adults in Spain. This study aims to offer a cost-effective prevention strategy that minimize the negative consequences on the physical and mental health of young adults in Spain.

Eligibility criteria

This trial does not accept healthy volunteers

Qualifiers

Between 18 and 30 years old.

At least one occasion of cannabis use in the last month.

Access to smartphones (iOS or Android).

Access to Internet.

Disqualifiers

None

Trial design

Design model

Parallel

Treatments tested in this trial

  • CBT-based intervention

    Behavioral

    * 1st week: Daily self-report on cannabis and tobacco use, myths regarding cannabis use and its health consequences, motives for cannabis use reduction/quitting, psychoeducation concerning withdrawal symptomatology, therapist's recommendation (progressive reduction of cannabis use). * 2nd week: Daily self-report on cannabis and tobacco use, myths regarding cannabis use and its health and behavioral consequences, identification of triggers, alternatives to cannabis use, therapist's recommendation (progressive reduction of cannabis use). * 3rd week: Daily self-report on cannabis and tobacco use benefits from quitting cannabis, behavioral activation, diaphragmatic breathing, training in social abilities, strategies to prevent smoking, therapist's recommendation (progressive reduction of cannabis use). * 4th week: Daily self-report on cannabis and tobacco use (i.e., nº of joints/cigarettes), high-risk situations for relapse, lapse vs. relapse, coping strategies, relapse prevention plan.

  • Self-help guide

    Behavioral

    Psychoeducation on cannabis.

Treatment groups

120 Participants
are divided into 2 treatment groups
Group A: App-assisted CBT-based interventionExperimental treatment 1 intervention
Group B: App-assisted self-help guideActive comparator 1 intervention

Trial outcomes

Primary outcomes

1

Cannabis abstinence

* Self-reported point prevalence cannabis abstinence * Continuous self-reported cannabis abstinence

Time frame
7-day point prevalence abstinence (PP) at 4-week follow-up (FU), 3-months follow-up (FU), 6-months follow-up (FU)
2

Cannabis reduction

* Self-reported reduction in quantity of cannabis used on a weekly basis (daily joints, number of hashish/marijuana joints, grams) * Decreases in self-reported past-month frequency of cannabis use (i.e., once, less than one per week, once/twice per week, 3-4 times a week, 5-6 times a week, every day).

Time frame
4 weeks follow-up (FU), 3 months follow-up (FU), 6 months follow-up (FU)
3

Acceptability

Client Satisfaction Questionnaire-8 (CSQ-8). The CSQ-8 is an 8-item questionnaire that evaluates the level of satisfaction with the treatment received by the participants. Scores range between 8-32, with higher scores indicating higher levels of satisfaction.

Time frame
4-week follow-up (FU)

Secondary outcomes

1

Changes in legal and illegal substance use

Self-reported past-month legal and illegal substance use (alcohol, tobacco, cocaine, heroine, amphetamine, ecstasies, hallucinogens, prescription drugs).

Time frame
4 weeks follow-up (FU), 3 months follow-up (FU), 6 months follow-up (FU),
2

Changes in cannabis-related problems

Pre to post-intervention changes in cannabis problems as measured by the Cannabis Use Disorder Identification Test-Revised (CUDIT-R). The CUDIT-R is an 8-item screening test for measuring cannabis-related problems. Scores of 8 or more are indicative of hazardous cannabis use. Meanwhile, scores of 12 or more indicate the participant may present a cannabis use disorder.

Time frame
4-week follow-up (FU), 3-months follow-up (FU), 6-months follow-up (FU)
3

Improvement in risk of emotional disorders

Reductions in the severity of symptoms of depression, anxiety, somatization as measured by the Brief Symptoms Inventory-18 (BSI-18). The BSI-18 is an 18-item assessment screening of psychological distress (somatic, anxious and depressive symptomatology). Scores range between 0-72, with higher values indicating higher risk of depression, anxiety and somatization.

Time frame
Changes in 4-week follow-up (FU), 6-months follow-up (FU)

Other outcomes

Sponsors and contacts

Click on the lead sponsor to view all of their trials.

Alba González-Roz, PhD

Lead sponsor

University of Oviedo

Sponsor institution

Delegación del Gobierno para el Plan Nacional sobre Drogas

Collaborator

Source ClinicalTrials.gov
Apply now