The prevalence and course of post-traumatic depression in children and adolescents

Background: The prevalence and course of depression following trauma is currently poorly understood within the literature, particularly in youth. Understanding the trajectory of depressive reactions post-trauma is critical for developing approaches to early management and treatment. This study considered the prevalence and trajectories of depression symptoms up to one-year post-trauma.

Method: Participants were 2006 trauma-exposed youth (mean age = 12.6 years; SD = 3.16) from the international PACT/R archive. Depression prevalence was assessed at four post-trauma intervals: acute (>24 h to 1 month), short (>1 to 3 months), intermediate (>3 to 6 months), and long-term (>6 to 12 months). Two operational definitions were used: “likely DSM-5 depression” (meeting DSM-5 diagnostic criteria) and “likely clinically significant depression” (based on frequently assessed symptoms). Prevalence of individual symptoms and symptom trajectories over time were analysed.

Results: The prevalence of “likely DSM-5 depression” was 18.5% in the acute phase and 14.8% at long-term follow-up. For “likely clinically significant depression”, rates were higher: 38.7% (acute) and 34.7% (long-term). Individual symptom prevalence ranged from 13.5% to 62.6% in the acute phase and 15.5% to 63.5% at long-term follow-up. Two symptom trajectories emerged: a smaller group (n = 165) with minimal symptoms and a larger group (n = 411) with persistent symptoms.

Conclusion: Depression is a common and often persistent response to trauma in children and adolescents, with limited spontaneous recovery over the first year. Routine screening and early intervention for depression in trauma-exposed youth are warranted. Further longitudinal research is needed to identify modifiable risk factors and effective treatment strategies.