Resultados preliminares del Programa de Intervención Breve para Adolescentes que Inician el Consumo de Alcohol y otras Drogas / Preliminary study of a brief intervention program for adolescents who initiate alcohol and other drugs consumption

During the last two decades, alcohol, tobacco and illicit drug consumption among young people has come to be regarded as a serious public health problem, both in Mexico and internationally. This recognition has resulted from a trend toward higher levels of use, greater diversification of the types of drugs used and abused, and increased drug marketing. Epidemiological data show that most users initiate drug use when they are about 16 years old. However, the age of first drug experimentation appears to be decreasing, with recent reports indicating an average age 12 or 13 years at present. The societal costs of adolescent drug use cut across different domains including physical and mental health, car crashes, and morbidity and mortality related to substance misuse. The personal costs of teen drug use include school failure, drop-out, and truancy. Moreover, aggressive behavior and crime, risky sexual behaviour, and many other behavioural problems have been shown to be associated with adolescent drug use. Research from many different disciplines has increased knowledge about (a) important dimensions of adolescent substance use and (b) the processes and variables related to the origin and maintenance of addictive behavior among teenagers. Despite this growing body of knowledge, few current prevention and treatment programs are based on empirical investigation. Moreover, many current intervention programs have not been adequately evaluated in regard to effectiveness. A recent development in the addiction field is brief intervention (BI). BIs have been demonstrated to be effective in the treatment of addictive behavior among adult problem drinkers, with the most successful programs based on the Theory of the Social Learning. Only recently have BIs been tried with adolescent populations. While promising, little empirical research exists about the effectiveness of brief treatment with adolescents. The primary goals of BIs are to (a) reduce or eliminate substance consumption and (b) to mitigate the adverse effects of using alcohol or other drugs (i.e., harm reduction). While the goals of BIs are clear, the effectiveness of such programs with adolescents, despite their promise, is not well researched. For this reason, it is important to develop and empirically test BI programs for adolescents demonstrating problematic alcohol or other drug consumption. Schools represent a particularly good place to access adolescents who would benefit from BIs, and BIs represent an attractive alternative to the typical strategies used by school to address student substance use (i.e., suspension or expulsion). The main goal of this investigation was to develop and to evaluate a brief intervention program for teenagers with substance abuse (but who have not developed substance dependence) between 14 and 18 years old. The intervention program tries to: (a) promote a change in drug consumption through establishing consumption goals (in the case of the alcohol, moderation or abstinence; in the case of illegal drugs, abstinence); (b) identify high-risk situations in which use is probable; and (c) develop alternative strategies to these situations. The theorical bases of the intervention include Self-control Theory, Motivational Interviewing, Relapse Prevention and <>. Our brief intervention program consisted of six steps: 1. case detection, which involved the identification of adolescents who abuse alcohol or another drugs, by means of teacher's reports, legal and psychology personnel, trained by the investigators; 2. screening, which involved determining whether adolescents met inclusion criteria; 3. assessment, which addressed the frequency and amount of consumption and self-confidence to suitably face situation of probable drug; 4. induction to the program, the objective of which was to sensitize the adolescents about the importance of attending treatment; 5. intervention; and, 6. one, three and six months follow-up assessments. The intervention program consisted of four individual sessions with the participants in which they chose their own substance reduction goals, identified their high risk situations, developed coping plans for each high risk situation, and appraised the impact of their substance use on their own life-goals success. The researchers used a single-case design with 25 participants, 17 of whom had alcohol problems and eight of whom had marijuana problems. The age average of participants was 16 years (SD = 1.8), and 19 were male and six were female. The average age of first consumption was 14 years old (SD = 1.72); the average duration of substance use was 18 months. From the complete sample, 45% reported consumption one or twice per week, 22% reported daily consumption, and the remainder consumed once a month. Results indicated that from the 25 participants, 24 demonstrated changes from the baseline in their consumption pattern (measured by frequency and quantity) during intervention and at follow-up assessments. Self-efficacy levels (self-perceptions about the capability to abstain or use moderately in high risk situations) changed as well. Specifically, among the adolescents who consumed alcohol a one-way ANOVA revealed significant changes in average consumption between the baseline, treatment, and follow-up phases F(2.48) = 17.691, p < .001. Bonferroni's post-hoc tests showed differences between baseline ( = 8.89, SD = 3.55) and treatment ( = 4.46, SD = 3.27), and between baseline and the follow-up ( = 3.29, SD = 1.35). Student's t tests for each subject showed that 16 adolescents significantly reduced their alcohol consumption from the baseline to the follow-up. Only one participant demonstrated increased use (from five standard drinks per drinking occasion at the baseline to 5.90 standard drinks at the follow-up). Regarding consumers of marijuana, a one-way ANOVA showed significant changes in consumption across the baseline, treatment and follow-up phases F(2.21) = 8.219, p = .002. Bonferroni's post-hoc tests showed significant differences between the baseline ( = 18.23, SD = 16.62) treatment phases ( = 1.07, SD = 0.77), and between the baseline and the follow-up phases ( = 1.59, SD = 1.06). An additional one-way ANOVA revealed significant changes in self-efficacy. Specifically, participants demonstrated increased self-efficacy in situations including: Unpleasant emotions, Pleasant emotions, Testing personal control, Conflict with others, Social pressure, and Pleasant time with others (all p < .01), F(2.78) = 24.30, 12.47, 11.34, 11.02, 16.91 and 25.62, respectively. Self-efficacy in regard to Physical discomfort and Urges and temptations to drink also showed significant changes, but at p < .05 F(2.78) = 3.97 and 3.26, respectively. Finally, in order to evaluate the impact of the intervention on problems that participants associated with their alcohol use (or other drugs), seven areas were examined: School, Health, Cognitive, Interpersonal, Family, Legal and Economic. At the end of the treatment, there was a reduction in the number of problems related to these seven areas, compared with the baseline.

En las últimas décadas, el abuso de drogas legales e ilegales en los jóvenes ha sido considerado como un serio problema de salud pública, tanto en el ámbito internacional como en nuestro país. Los estudios epidemiológicos indican que la mayoría de los consumidores experimentan por primera vez con drogas alrededor de los 16 años, pero esta experimentación continúa disminuyendo presentándose en promedio a los 12 o 13 años. Esto representa altos costos para la sociedad y el individuo. Por ejemplo, en áreas de la salud se incrementan los costos de la atención médica, los servicios de salud mental y los tratamientos especializados, además de aumentar la probabilidad de accidentes y muertes relacionadas con el abuso; en el área escolar se presenta el fracaso y/o la deserción escolar, y la expulsión de los estudiantes por parte de las instituciones; y en el área social se pueden presentar conductas agresivas y/o delictivas, contacto sexual de riesgo y otros problemas de conducta relacionados con el consumo de sustancias. De los diferentes programas existentes, resaltan las intervenciones breves en el tratamiento de usuarios que abusan pero que no dependen de las sustancias. Este tipo de intervenciones se basan en la Teoría del Aprendizaje Social y están diseñadas para reducir los patrones de abuso de alcohol u otras drogas. Sin embargo, la aplicación de las intervenciones breves se ha realizado principalmente en adultos, y es hasta últimas fechas que éstas se han adaptado a población adolescente que abusa de las sustancias, sin tenerse todavía resultados concluyentes. Es por esto que es fundamental desarrollar programas de intervención breve como una alternativa para adolescentes que inician el abuso de alcohol u otras drogas. Otro punto que requiere atención es el desarrollo de estrategias para detectar los casos en las escuelas, con la finalidad de ofrecer los servicios de atención en las propias instituciones educativas sin que el adolescente tenga consecuencias como la suspensión o la expulsión. Ante este fenómeno se ha recomendado fortalecer acciones que se basan en la identificación temprana de patrones de consumo que ponen en riesgo al adolescente a diferentes problemas relacionados con el abuso de las drogas. Estos programas se deben caracterizar por ser costo-eficientes, breves y capaces de instrumentarse en una variedad de escenarios, así como de aplicarse a una variedad de culturas. Por lo tanto, el objetivo de esta investigación fue desarrollar y evaluar un programa de intervención breve para adolescentes de entre 14 y 18 años de edad, estudiantes de nivel medio y medio superior, que consumen alcohol en exceso u otras drogas, y que presentan problemas relacionados con este patrón de consumo pero sin cubrir los síntomas físicos de la dependencia. Para realizar la evaluación se utilizó un diseño de caso único con 25 réplicas, 17 casos de consumo de alcohol y 8 casos de consumo de mariguana. De los 25 adolescentes que participaron en el estudio, 24 mostraron una disminución en el patrón de consumo (cantidad y frecuencia de consumo), al comparar las mediciones de los datos recabados en las fases de línea base, tratamiento y seguimiento. Así mismo, se dieron cambios en el nivel de auto-eficacia (percepción de la capacidad de los sujetos para controlar sus situaciones de consumo), es decir, al finalizar el tratamiento los adolescentes se percibieron a sí mismos con mayor capacidad para controlar la cantidad de consumo en situaciones de riesgo. Además, al final del tratamiento los sujetos reportaron una reducción del número de problemas relacionados con su consumo. Esta investigación es uno de los primeros esfuerzos por demostrar el impacto de las intervenciones breves en el patrón de consumo de los adolescentes. Las limitaciones del estudio fueron que no se determinó el efecto específico de cada uno de los componentes del programa ni tampoco se evaluó la presencia de otras conductas problemáticas (comorbilidad). Sin embargo, esta investigación ofrece un apoyo empírico a los programas de intervención breve en población adolescente de nuestro país.