Effectiveness of group psychotherapy for adult outpatients traumatized by abuse, neglect, and/or pregnancy loss: a multiple-site, pre-post-follow-up, naturalistic study.

The New Experience for Survivors of Trauma (NEST) is a group psychotherapy intervention for clients traumatized by consequences of abuse, neglect, and pregnancy loss. This multiple site study is the first investigation of its effectiveness. Ninety outpatients from a naturalistic setting completed the Symptom Checklist and the Sense of Coherence questionnaire at baseline, end of treatment, and one-year follow-up. Effectiveness was tested with statistical significance, effect size, and clinical significance. Clients from the total sample as well as from the abortion subsample showed improvement at the end of treatment and at follow-up. Lack of a control group is balanced to some extent by the high ecological validity. The findings suggest that the NEST treatment may be beneficial for traumatized clients and call for further research.