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Predictores de la iniciación al consumo de sustancias en adolescentes relacionados con la impulsividad
Jodi Gilman1,2, Kevin Potter1,2, Jasmeen Kaur1
1https://ror.org/002pd6e78Massachusetts General Hospital, USA.
Psychological medicine
|February 6, 2026
Resumen
La impulsividad es un predictor significativo pero menor del consumo de sustancias en adolescentes. Los tamaños de muestra grandes son cruciales para una predicción fiable en entornos comunitarios.
Área de la Ciencia:
- Neurociencia
- Psicología del Desarrollo
- Investigación sobre Adicciones
Sus antecedentes:
- La impulsividad se considera un factor de riesgo clave para el consumo de sustancias en adolescentes en los modelos de neurodesarrollo.
- Predecir el consumo de sustancias es un desafío debido a las variadas medidas de impulsividad y a las limitaciones de la investigación, como los tamaños de muestra pequeños y los diseños transversales.
Objetivo del estudio:
- Examinar la utilidad predictiva de las medidas de impulsividad para el consumo de sustancias en adolescentes.
- Investigar cómo las estrategias y los tamaños de muestra influyen en la asociación entre la impulsividad y el consumo de sustancias.
Principales métodos:
- Se utilizó el conjunto de datos ABCD (n=11,868) para analizar las correlaciones entre las medidas de impulsividad.
- Se evaluó la precisión predictiva longitudinal prospectiva y concurrente para los resultados de consumo de sustancias antes de los 15 años.
- Se empleó simulación para explorar variaciones en las estrategias y tamaños de muestra.
Principales resultados:
- Las medidas del cuestionario, en particular la escala de externalización del CBCL, superaron a las medidas conductuales en la predicción de la iniciación al consumo de sustancias.
- Las predicciones de impulsividad mostraron efectos estadísticamente detectables pero clínicamente pequeños (AUCs 0.6-0.76), sensibles al tamaño de la muestra y a las tasas base de consumo de sustancias.
- Se necesitaron tamaños de muestra grandes (n > 1000) para una potencia estadística adecuada para predecir la iniciación al consumo de sustancias.
Conclusiones:
- La impulsividad contribuye de manera significativa pero mínima a la predicción del inicio del consumo de sustancias en adolescentes tempranos, insuficiente por sí sola para la implementación clínica.
- La predicción reproducible del consumo de sustancias en adolescentes en muestras comunitarias requiere tamaños de muestra grandes.
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