Cognitive processing therapy for the treatment of acute stress disorder following sexual assault: A randomised effectiveness study

Reginald Nixon, Talitha Best, Sarah Wilksch, Samantha Angelakis, Lisa Beatty, Nathan Weber

    Research output: Contribution to journalArticle

    10 Citations (Scopus)

    Abstract

    The effectiveness of individually administered cognitive processing therapy (CPT) when compared with treatment as usual (TAU) in a community sexual assault centre was tested. Trauma survivors with acute stress disorder (ASD) following sexual assault were randomised to either CPT (n = 25) or TAU (n = 22), and assessed at pretreatment, posttreatment, and 3-, 6- and 12-month follow-up. Both groups demonstrated large reductions in PTSD and depression symptoms following treatment, and these gains were maintained over the course of follow-ups (Cohen's ds for PTSD symptom reductions ranging between 0.76 to 1.45). Although smaller and not always consistent, between-group effect sizes typically favoured CPT. Effect sizes (d) ranged between 0.13-0.50 for posttraumatic stress and 0.13-0.41 for depression over the course of follow-ups. Independent assessment of PTSD severity indicated more CPT participants reached good end-state functioning at 12-month follow-up (50%) than TAU(31%). Although both treatments were effective, there were some indications that CPT led to better outcomes relative to therapists delivering their usual therapy. The present study demonstrates that evidence-based, trauma-focused therapy such as CPT can be effective when delivered as an early intervention in a routine mental health setting.

    Original languageEnglish
    Pages (from-to)232-250
    Number of pages19
    JournalBehaviour Change
    Volume33
    Issue number4
    DOIs
    Publication statusPublished - 1 Dec 2016

    Keywords

    • Cognitive processing therapy
    • Effectiveness
    • Posttraumatic stress disorder
    • Sexual assault
    • Treatment outcome

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