In 105 adolescent psychiatric patients, time perspective mediated the relationship between trauma and PTSD symptoms, and PTSD symptoms predicted cannabis use frequency.
Adolescent therapists, PTSD researchers, school counselors working with traumatized youth.
105 adolescent psychiatric patients studied
What the researchers found
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.
Why it matters
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.
The numbers in context
105 participants. Ages 14-20. Recruited from psychiatric units. PTSD patients showed high negative past orientation and low positive past/future orientation. PTSD symptoms predicted cannabis use frequency. Time perspective mediated PTSD symptom severity.
How the study worked
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.
What this study cannot tell us
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.
How to read the evidence
Preliminary: novel finding with plausible mechanism but small cross-sectional sample from a clinical population.
When this study was published
2025 study
The bigger picture
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.
Questions still open
- Would time perspective therapy reduce both PTSD symptoms and cannabis use in adolescents? Does cannabis use further distort time perspective, creating a feedback loop? Are there sex differences in how time perspective mediates trauma-cannabis relationships?
Common questions
Why do teens with PTSD use cannabis?
Could therapy help reduce cannabis use in traumatized teens?
Read the original research
Post-Traumatic Stress in Adolescence: The Mediating Role of Time Perspective Between Trauma Exposure, PTSD Symptoms, and Cannabis Use.
European journal of investigation in health, psychology and education, 15(9)
Citation
Pütz, Alexander; Hapfelmeier, Gerhard; Martin, Alexandra; Bender, Stephan; Walg, Marco. (2025). Post-Traumatic Stress in Adolescence: The Mediating Role of Time Perspective Between Trauma Exposure, PTSD Symptoms, and Cannabis Use.. European journal of investigation in health, psychology and education, 15(9). https://doi.org/10.3390/ejihpe15090177
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