The long-term effectiveness of cognitive behavior therapy for psychosis within a routine psychological therapies service

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Abstract

Randomised controlled trials (RCTs) have shown the efficacy of CBTp, however, few studies have considered its long-term effectiveness in routine services. This study reports the outcomes of clients seen in a psychological therapies clinic, set up following positive results obtained from an RCT (Peters et al., 2010). The aims were to evaluate the effectiveness of CBTp, using data from the service's routine assessments for consecutive referrals over a 12 years period, and assess whether gains were maintained at a 6+ months' follow-up. Of the 476 consenting referrals, all clients (N = 358) who received =5 therapy sessions were offered an assessment at four time points (baseline, pre-, mid-, and end of therapy) on measures assessing current psychosis symptoms, emotional problems, general well-being and life satisfaction. A sub-set (N = 113) was assessed at a median of 12 months after finishing therapy. Following the waiting list (median of 3 months) clients received individualized, formulation-based CBTp for a median number of 19 sessions from 121 therapists with a range of experience receiving regular supervision. Clients showed no meaningful change on any measure while on the waiting list (Cohen's d

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APA

Peters, E., Crombie, T., Agbedjro, D., Johns, L. C., Stahl, D., Greenwood, K., … Kuipers, E. (2015). The long-term effectiveness of cognitive behavior therapy for psychosis within a routine psychological therapies service. Frontiers in Psychology, 6(OCT). https://doi.org/10.3389/fpsyg.2015.01658

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