How Teens Think About Time May Explain the Link Between Trauma and Cannabis Use

Among 105 adolescent psychiatric patients (ages 14-20), those with clinically relevant PTSD symptoms showed imbalanced time perspective: high orientation to negative past and low orientation to positive past and future. Time perspective mediated the level of PTSD symptoms in the relationship between trauma exposure and symptoms. PTSD symptoms predicted cannabis use frequency, suggesting a pathway from trauma through distorted time perception to substance use.

Cross-sectional study of 105 patients aged 14-20 recruited from child and adolescent psychiatric units. Standardized questionnaires assessed exposure to potentially traumatic experiences (EPTE), PTSD symptoms, time perspective, and cannabis use. Mediation analysis examined direct and indirect pathways.

Understanding why traumatized adolescents turn to cannabis is crucial for prevention. This study identifies time perspective, how teens think about past, present, and future, as a key mediator. If therapy can help teens develop a more balanced time orientation, it might reduce both PTSD severity and associated cannabis use.

Most PTSD models are developed from adult research. This study suggests that adolescent PTSD may have distinct features related to how young people process temporal experience. Incorporating time perspective interventions into adolescent PTSD therapy could address both the trauma symptoms and the cannabis use that often accompanies them.

Cross-sectional design cannot determine causal direction. Clinical psychiatric sample may not generalize to community adolescents. Self-reported cannabis use. Relatively small sample (N=105). Cannot determine whether cannabis use preceded or followed trauma/PTSD development.