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| ID | Type | Description | Link |
|---|---|---|---|
| 2022I002 | Other Grant/Funding Number | Government Delegation for the National Plan on Drugs |
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| Name | Class |
|---|---|
| Delegación del Gobierno para el Plan Nacional sobre Drogas | UNKNOWN |
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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.
The aim of this study is to evaluate the efficacy and cost-effectiveness in the short (1-month) and long-term (3 and 6 months) of a digitalized intervention (CANQUIT) to reduce and/or quit cannabis among young Spanish adults.
CANQUIT is a 4-week digitalized CBT-based intervention aimed at reducing or ceasing cannabis use among regular cannabis users (at least 1 occasion of cannabis use in the previous month). It is specifically tailored to young adults (18-30 years old). CANQUIT will be available to download both on Apple Store (iOS) and Play Store (Android). Upon completion of the baseline assessment, participants will be randomly assigned 2:1 to either an experimental arm (60 participants: App-assisted CBT-based intervention) or control (60 participants: App-assisted self-help guide). Participants in the experimental arm will be exposed to seven weekly modules, which include: 1) psychoeducation regarding the benefits of ceasing cannabis use, its short and long-term effects and myths associated with its consumption, 2) training in emotion regulation strategies, stimulus control (i.e., alternatives to cannabis use), 3) behavioral activation strategies, and 4) relapse prevention (i.e., assertiveness and problem-solving abilities). Participants will also register daily consumption of cannabis (number of joints) and receive weekly recommendations regarding cannabis use reduction. To ensure adherence to treatment, CANQUIT includes gamification via direct contact with a mental health professional and social interaction with others (through an online chat).
Alternatively, participants allocated to the control group will receive a self-help guide with information based on the contents of the App. This guide will be also available through the App. As in the experimental arm, participants in the control group will also complete 1-month, 3-months and 6-months follow-ups through the App.
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| Label | Type | Description | Intervention Names |
|---|---|---|---|
| App-assisted CBT-based intervention | Experimental | Participants have access to a 4-week digitalized CBT-based intervention. Participants will have access to seven weekly modules. Modules include cannabis-related psychoeducation (i.e., benefits concerning cannabis use reduction/quitting, short- and long-term consequences, myths), training in emotional regulation strategies, stimulus control (i.e., alternatives to cannabis use), behavioral activation strategies and relapse prevention (i.e., training in assertiveness skills and problem-solving abilities). |
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| App-assisted self-help guide | Active Comparator | Participants receive a self-help guide based on psychoeducation on cannabis use and its physical/mental health effects. |
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| Name | Type | Description | Arm Group Labels | Other Names |
|---|---|---|---|---|
| CBT-based intervention | Behavioral |
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| Measure | Description | Time Frame |
|---|---|---|
| Cannabis abstinence |
| 7-day point prevalence abstinence (PP) at 4-week follow-up (FU), 3-months follow-up (FU), 6-months follow-up (FU) |
| Cannabis reduction |
| 4 weeks follow-up (FU), 3 months follow-up (FU), 6 months follow-up (FU) |
| 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. | 4-week follow-up (FU) |
| Measure | Description | Time Frame |
|---|---|---|
| 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). | 4 weeks follow-up (FU), 3 months follow-up (FU), 6 months follow-up (FU), |
| Changes in cannabis-related problems |
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Inclusion Criteria:
Exclusion Criteria:
-
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| Name | Role | Phone | Extension | |
|---|---|---|---|---|
| Alba González-Roz, PhD, Assistant Professor | Contact | +34 985104189 | gonzalezralba@uniovi.es |
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| Facility | Status | City | State | ZIP | Country | Contacts |
|---|---|---|---|---|---|---|
| Faculty of Psychology, University of Oviedo | Recruiting | Oviedo | Principality of Asturias | 33003 | Spain |
| PubMed Identifier | Type | Citation | Retractions |
|---|---|---|---|
| Result | Derogatis, L.R. (2001). BSI 18, Brief Symptom Inventory 18: Administration, scoring and Procedure Manual. Pearson. | ||
| 20347232 | Result | Adamson SJ, Kay-Lambkin FJ, Baker AL, Lewin TJ, Thornton L, Kelly BJ, Sellman JD. An improved brief measure of cannabis misuse: the Cannabis Use Disorders Identification Test-Revised (CUDIT-R). Drug Alcohol Depend. 2010 Jul 1;110(1-2):137-43. doi: 10.1016/j.drugalcdep.2010.02.017. Epub 2010 Mar 26. | |
| 10259963 |
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| ID | Term |
|---|---|
| D002189 | Marijuana Abuse |
| ID | Term |
|---|---|
| D019966 | Substance-Related Disorders |
| D064419 | Chemically-Induced Disorders |
| D001523 | Mental Disorders |
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| Self-help guide | Behavioral | Psychoeducation on cannabis. |
|
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. |
| 4-week follow-up (FU), 3-months follow-up (FU), 6-months follow-up (FU) |
| 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. | Changes in 4-week follow-up (FU), 6-months follow-up (FU) |
| University of Oviedo | Active, not recruiting | Oviedo | Principality of Asturias | 33003 | Spain |
| Result |
| Attkisson CC, Zwick R. The client satisfaction questionnaire. Psychometric properties and correlations with service utilization and psychotherapy outcome. Eval Program Plann. 1982;5(3):233-7. doi: 10.1016/0149-7189(82)90074-x. |