Guided Self-Change Prevention Program for Alcohol Abuse in Adolescents in Educational Settings

Study Overview
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Brief Summary
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This study corresponds to a pretest-posttest randomized experimental design with two arms. Arm 1 includes Guided Self-Change program, and Arm 2 a psychoeducational program to promote healthy habits. This study aims to analyze the efficacy of a selective and indicated prevention program based on the Guided Self-Change model (GSC) in adolescent alcohol users between 16-18 years. Researchers hypothesize that implementation of GSC therapy will lead to a greater reduction of alcohol drinkers compare with the control condition, and will prevent alcohol abuse after 6 and 12 months.

Official Title
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Prevention of Alcohol Abuse in Educational Settings (PRVENALC)

Conditions
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Alcohol Abuse or Dependence

Intervention / Treatment
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* Behavioral: Guided Self-Change therapy (GSC)
* Behavioral: Psychoeducation program about healthy habits


Participation Criteria
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Eligibility Criteria
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Inclusion Criteria: 16-18 years old. Having inform consent from parents Report using alcohol at least once a month during the previous last three months Exclusion Criteria: Participants will be excluded if they refer being diagnosed with a severe mental disorder. Have a severe medical illness that will limit participation Being under treatment for a psychological of psychiatric problem. Meet DSM criteria for Drug dependence to illegal drugs.

Ages Eligible for Study
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Minimum Age: 16 Years
Maximum Age: 18 Years

Sexes Eligible for Study
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All

Accepts Healthy Volunteers
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Accepts Healthy Volunteers

Study Plan
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How is the study designed?
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Design Details

Primary Purpose: Prevention
Allocation: Randomized
Intervention Model: Parallel Assignment
Masking: Triple


Arms and Interventions

| Participant Group/Arm | Intervention/Treatment |
| --- | --- |
| Experimental: Guided Self-Change therapy<br> | Behavioral: Guided Self-Change therapy (GSC)<br>* The GSC program follows a motivational cognitive-behavioral approach designed to minimize resistance in drug behavior changes, prevent relapse risk, and increase motivation to quit. The GSC consists of 5 weekly sessions of 50 minutes delivered in groups of 20-25 people.<br>|
| Active Comparator: Psychoeducation program about healthy habits<br> | Behavioral: Psychoeducation program about healthy habits<br>* The psychoeducational program will include talks about healthy habits such as physical activity, relaxation, and sleep hygiene. This intervention consists of 5 weekly sessions of 50 minutes delivered in groups of 20-25 people.<br>|

What is the study measuring?
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Primary Outcome Measures

| Outcome Measure | Measure Description | Time Frame |
| --- | --- | --- |
| Alcohol use change | Alcohol use will be assessed using the Timeline Follow-Back (Sobell & Sobell, 1992) | Change from baseline up to 5 weeks and two follow-ups at 6 and 12 months post intervention | 
| Alcohol abuse | Alcohol abuse will be assessed using the Rutgers Alcohol Problem Index (White & Labouvie, 1989). The global score ranges from 0 to 69, where higher scores represent greater level of alcohol-related problems. | Change from baseline to week 5, and at 6 and 12 months post intervention. | 
| Alcohol dependence | Alcohol dependence will be assessed with the Alcohol Use Disorder and Associated Disabilities Interview Schedule-5 (Grant et al., 2015). | Change from baseline to week 5, and at 6 and 12 months post intervention. | 

Secondary Outcome Measures

| Outcome Measure | Measure Description | Time Frame |
| --- | --- | --- |
| Drug use | Assessed with the Drug History Questionnaire (Sobell et al., 1995). | Change from baseline to week 5, and at 6 and 12 months post intervention. | 
| Impulsiveness | Impulsiveness will be assessed with the Impulsive Behavior Scale (Cyders et al., 2014). The global score ranges from 20 to 80, where higher scores represent greater level of impulsivity. | Change from baseline to week 5, and at 6 and 12 months post intervention. | 
| Sleep quality | Sleep will be assessed with different sleep measures, such as the Brief version of the Pittsburgh Sleep Quality Index (Sancho-Domingo et al., 2021). The global score of the B-PSQI ranges from 0 to 15, where higher scores represent poor sleep quality. | Change from baseline to week 5, and at 6 and 12 months post intervention. |