Objective: This individual participant data meta-analysis aimed to investigate the effectiveness of cognitive behavioral therapy with a trauma focus (CBT-TF) for posttraumatic stress disorder (PTSD). Furthermore, we examined the effect of moderators on PTSD symptom severity.

Background Over 6 million people have fled their homes in response to the full- scale invasion of Russian armed forces into Ukraine and are forcibly displaced since the start on 4 February 2022. Refugees, both adults and children, have a high risk of developing mental health disorders, in particular post- traumatic stress disorder, depression and anxiety disorders. Research into the mental health of Ukrainian families and their needs is urgently needed.

Sleep plays a crucial role in emotion regulation. Disturbed sleep is therefore increasingly seen as a potential causal factor for the development and maintenance of affective psychiatric disorders. This may hold especially for borderline personality disorder (BPD), a core emotion dysregulation disorder. Although BPD is strongly associated with sleep disturbances such as insomnia, nightmares and circadian dysrhythmia, research into the role of sleep in BPD remains sparse.

Recent work has continued to deepen our understanding of the manifestation of Complex Post Traumatic Stress Disorder (CPTSD). While disturbance of self-organization (DSO) is identified as a key symptom set distinguishing CPTSD from general PTSD diagnostic criteria, specific DSO assessments which include attachment themes would be a helpful tool for clinicians to address DSO in clinical, subclinical, and nonclinical populations.