REStoring Mood After Early Life Trauma: the Effectiveness of Trauma-focused Therapy in Patients With Depression and Childhood Trauma

Depression is a debilitating psychiatric disorder with a recurrent and progressive course. Even though antidepressants and psychotherapy are often effective, a substantial proportion of patients does not respond to currently used evidence-based treatments. Around 25% of depressive patients has experienced moderate to severe levels of childhood trauma (CT), ranging from physical and emotional neglect to emotional, physical and sexual abuse. There is increasing evidence that depression related to childhood trauma (CT) is critically different from non-CT related depression: it emerges earlier in life with more severe and recurrent symptoms and has worse treatment outcomes. Therefore, there is a large and unmet need for novel therapeutic strategies for CT-related depression. Currently, there is no targeted treatment available for CT-related depression. Given the major role of trauma in CT-related depression, it is plausible that trauma-focused psychotherapies may be effective in this depression subtype. The current study aims to investigate the effectiveness of trauma-focused therapy (TFT), as an addition to 'treatment as usual' (TAU), in reducing depression symptom severity in patients with CT-related depression. It is expected that trauma-focused therapy will be a safe and rational strategy to enhance resilience and improve depression outcomes for patients with CT-related depression. RESET-psychotherapy is a 12-week randomized controlled clinical trial (single-blind RCT), in which TFT in combination with TAU will be compared to TAU only at various specialized mental healthcare units of mental health care institutions. The study population will consist of 158 adult patients who have a diagnosis of moderate to severe depression (according to the Diagnostic and Statistical Manual of Mental Disorders (DSM-5)) and moderate to severe childhood trauma (CT). The primary outcome measure is defined as depression symptom severity after 12 weeks treatment (post-treatment), measured with the Inventory of Depressive Symptomatology - Self Rated (IDS-SR). Data will be collected during multiple assessments: at baseline (T0), after 6 weeks (T1), after 12 weeks (T2; post-treatment), and after 6 months post-treatment (follow-up, T3). Information about depressive symptoms, childhood trauma and other health-related outcomes will be assessed using self-report questionnaires and semi-structured clinical interviews. In addition, to better understand how and for who TFT works, stress-related biomarkers (hair cortisol, inflammatory and epigenetic biomarkers in the blood) will be examined pre- and post-treatment. A sub-group of patients (N=60, 30 per intervention group) will be asked to undergo fMRI scans pre- and post-treatment to measure stress-related brain activity (fMRI sub-study, ±60 minutes per fMRI session).