Human trafficking is a grave human rights violation and a major public health concern. Survivors present with high rates of mental health problems including post-traumatic stress disorder (PTSD). Studies of effective treatments for PTSD in survivors of human trafficking are lacking. Narrative exposure therapy (NET) is an effective PTSD treatment for multiple, prolonged and complex trauma, but its efficacy has not been rigorously tested in survivors of human trafficking.

To test the feasibility and acceptability of a randomised controlled trial (RCT) offering NET as a treatment for PTSD in trafficking survivors with a history of multiple traumatic events, as well as providing preliminary evidence regarding its efficacy (trial registration: ISRCTN95136302).

A single-blind RCT compared NET with a wait-list control in survivors of trafficking with PTSD (n = 25). In the NET arm of the study, participants attended a mean of 17 sessions.

NET was well tolerated by participants. There were significant reductions in PTSD, depression and anxiety symptoms post-treatment in the NET group but no significant change in the wait-list group.

The results indicate that NET is a promising and acceptable treatment for trafficking survivors. Psychological therapy in an RCT design can be safely delivered to this vulnerable group, although modifications are required to ensure their holistic needs are properly addressed.

Refugees and asylum seekers often report having experienced numerous complex traumas. It is important to understand the prevalence of complex post-traumatic stress disorder (CPTSD), which can follow complex traumas.

This systematic review aims to summarise the available literature reporting the prevalence in refugees and asylum seekers of three operationalised definitions of CPTSD: the ICD-11 diagnostic criteria, the ICD-10 criteria (for enduring personality change after catastrophic experience) and the DSM-IV criteria (for disorders of extreme stress not otherwise specified).

Six electronic databases were searched for studies reporting the prevalence of CPTSD in adult refugee and/or asylum-seeking samples. Owing to heterogeneity between the studies, a narrative synthesis approach was used to summarise studies. Methodological quality was assessed using the Joanna Briggs Critical Appraisal Checklist for Prevalence Studies. This systematic review has been registered with PROSPERO (registration number CRD42020188422, https://www.crd.york.ac.uk/prospero/display_record.php?RecordID=188422).

Systematic searches identified 15 eligible studies, with 10 examining treatment-seeking samples and five using population samples. CPTSD prevalence in treatment-seeking samples was between 16 and 38%. Prevalence in population samples ranged from 2.2 to 9.3% in four studies, with the fifth reporting a much higher estimate (50.9%).

This review highlights both the high prevalence of CPTSD in treatment samples and the lack of research aiming to establish prevalence of CPTSD in refugee and asylum-seeking populations. Understanding the prevalence of these disabling disorders has implications for policy and healthcare services for the appropriate promotion, planning and provision of suitable treatment and interventions for this highly traumatised population.

Asylum seekers are required to narrate past experiences to the UK Home Office, doctors, lawyers and psychologists as part of their claims for international protection. The Home Office often cites perceived inconsistencies in asylum interviews as grounds for refusal of their claims. A number of processes affect asylum seekers' abilities to narrate past experiences fully to the professionals interviewing them. The dilemmas around disclosure that asylum seekers face have received little attention to date. This work aims to explore the perspectives of UK-based medico-legal report-writing doctors, lawyers and psychologists whose work involves eliciting narratives from asylum seekers on the processes that affect asylum seekers' abilities to disclose sensitive personal information in interview settings. Eighteen professionals participated in semi-structured interviews in individual or focus group settings to discuss, from their perspectives of extensive collective professional experience, the narrative dilemmas experienced by asylum seekers with whom they have worked.

Professionals identified a number of processes that made disclosure of personal information difficult for asylum seekers. These included asylum seekers' lack of trust towards the professionals conducting the interview, unclear ideas around pertinence of information for interviewers, feelings of fear, shame and guilt related to suspicions around collusions between UK and their country-of-origin's authorities, sexual trauma and, occasionally, their own involvement or collusion in crimes against others.

Recommendations are made on how to improve the interview environment to encourage disclosure. These have important implications for future research and policy initiatives.

Post-traumatic stress disorder (PTSD) is a potentially chronic and disabling disorder affecting a significant minority of people exposed to trauma. Various psychological treatments have been shown to be effective, but their relative effects are not well established.

We undertook a systematic review and network meta-analyses of psychological interventions for adults with PTSD. Outcomes included PTSD symptom change scores post-treatment and at 1–4-month follow-up, and remission post-treatment.

We included 90 trials, 6560 individuals and 22 interventions. Evidence was of moderate-to-low quality. Eye movement desensitisation and reprocessing (EMDR) [standardised mean difference (SMD) −2.07; 95% credible interval (CrI) −2.70 to −1.44], combined somatic/cognitive therapies (SMD −1.69; 95% CrI −2.66 to −0.73), trauma-focused cognitive behavioural therapy (TF-CBT) (SMD −1.46; 95% CrI −1.87 to −1.05) and self-help with support (SMD −1.46; 95% CrI −2.33 to −0.59) appeared to be most effective at reducing PTSD symptoms post-treatment v. waitlist, followed by non-TF-CBT, TF-CBT combined with a selective serotonin reuptake inhibitor (SSRI), SSRIs, self-help without support and counselling. EMDR and TF-CBT showed sustained effects at 1–4-month follow-up. EMDR, TF-CBT, self-help with support and counselling improved remission rates post-treatment. Results for other interventions were either inconclusive or based on limited evidence.

EMDR and TF-CBT appear to be most effective at reducing symptoms and improving remission rates in adults with PTSD. They are also effective at sustaining symptom improvements beyond treatment endpoint. Further research needs to explore the long-term comparative effectiveness of psychological therapies for adults with PTSD and also the impact of severity and complexity of PTSD on treatment outcomes.