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Psicothema was founded in Asturias (northern Spain) in 1989, and is published jointly by the Psychology Faculty of the University of Oviedo and the Psychological Association of the Principality of Asturias (Colegio Oficial de Psicólogos del Principado de Asturias).
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Meta-analysis of family-based selective prevention programs for drug consumption in adolescence

María Valero de Vicente, Lluís Ballester Brage, María del Carmen Orte Socías and Joan Alfred Amer Fernández

Universidad de las Islas Baleares

Background: Substance consumption (SC) begins in adolescence and has been linked to protection factors such as family relationships (FR) and positive parenting (PP). There are few studies concerning the effectiveness of prevention programs based on the family, even though assessing interventions is one of the objectives of preventive science. The aim of this study was to analyze the evidence on family-based selective prevention programs in relation to drug consumption in adolescents. Methodology: A meta-analysis of 9 studies with 102 measures grouped in three dimensions, FR, PP and SC, ranging between 2001 and 2015, was conducted. Results: Effect sizes (ES) were found to be 0.82 for FR, 0.71 for PP, 0.77 for the combination of both and 0.21 for SC. The Q and I2 indexes expressed high heterogeneity. Conclusions: Despite obtaining high ES consistent with previous studies, the great heterogeneity found did not allow us to draw clear conclusions regarding the primary studies. It is recommended that methodological improvements in assessment and reporting processes  be carried out for future comparisons.

Meta-análisis sobre programas de prevención selectiva del consumo de drogas en adolescentes basados en la familia. Antecedentes: el consumo de sustancias (CS) comienza en la adolescencia y se ha relacionado con factores de protección como las relaciones familiares (RF) o la parentalidad positiva (PP). Existen pocas evaluaciones acerca de la eficacia de los programas de prevención basados en la familia. Evaluar las intervenciones es uno de los objetivos que persigue la ciencia preventiva. El objetivo del estudio es analizar las evidencias sobre los programas de prevención selectiva basados en la familia en relación al consumo de drogas en adolescentes. Metodología: se ha llevado a cabo un meta-análisis de 9 estudios con 102 medidas agrupadas en tres dimensiones, RF, PP y CS, comprendidos entre el 2001 y el 2015. Resultados: los tamaños del efecto (TE) encontrados para RF fue de 0.82, para PP de 0.71, para la combinación de ambas 0.77, y para CS 0.21. Los índices Q e I2 expresaron alta heterogeneidad. Conclusiones: a pesar de obtener TE altos congruentes con los estudios anteriores, la alta heterogeneidad no permite sacar conclusiones claras acerca de los estudios primarios. Se recomienda realizar mejoras metodológicas en los procesos de evaluación y lo reporten para las futuras comparaciones.

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