Evidence-based psychological interventions for adult survivors of torture and trauma: a 30-year review.

In this paper we review research evidence on psychosocial interventions for adult survivors of torture and trauma. We identified 40 studies from 1980 to 2010 that investigated interventions for adult survivors of torture and trauma. Population subtypes include resettled refugees, asylum seekers, displaced persons, and persons resident in their country of origin. Settings include specialized services for torture and trauma, specialized tertiary referral clinics, community settings, university settings, as well as psychiatric and multidisciplinary mental health services. Interventions were delivered as individual or group treatments and lasted from a single session to 19 years duration. The studies employed randomized controlled trials, nonrandomized comparison studies and single cohort follow-up studies. In all, 36 of the 40 studies (90%) demonstrated significant improvements on at least one outcome indicator after an intervention. Most studies (60%) included participants who had high levels of posttraumatic stress symptomatology. Improvements in symptoms of posttraumatic stress, depression, anxiety, and somatic symptoms were found following a range of interventions. Little evidence was available with regard to the effect on treatment outcomes of the amount, type, or length of treatment, the influence of patient characteristics, maintenance of treatment effects, and treatment outcomes other than psychiatric symptomatology. The review highlights the need for more carefully designed research that addresses the shortcomings of current studies and that integrates the experience of expert practitioners.