Effectiveness of metacognitive interventions for mental disorders in adults-A systematic review and meta-analysis (METACOG).

@article{Philipp2019EffectivenessOM,
  title={Effectiveness of metacognitive interventions for mental disorders in adults-A systematic review and meta-analysis (METACOG).},
  author={Rebecca Philipp and Levente Kriston and Jana Lanio and Franziska K{\"u}hne and Martin H{\"a}rter and Steffen Moritz and Ramona Meister},
  journal={Clinical psychology \& psychotherapy},
  year={2019},
  volume={26 2},
  pages={
          227-240
        }
}
We evaluated the effectiveness and acceptability of metacognitive interventions for mental disorders. We searched electronic databases and included randomized and nonrandomized controlled trials comparing metacognitive interventions with other treatments in adults with mental disorders. Primary effectiveness and acceptability outcomes were symptom severity and dropout, respectively. We performed random-effects meta-analyses. We identified Metacognitive Training (MCTrain), Metacognitive Therapy… 
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Effectiveness of metacognitive interventions for mental disorders in adults: a systematic review protocol (METACOG)
TLDR
A systematic review investigating the effectiveness of different metacognitive interventions for various mental disorders is missing and will provide researchers, clinicians and patients with substantial information on the intervention’s effectiveness across different mental disorders.
A systematic review and meta-analysis on controlled treatment trials of metacognitive therapy for anxiety disorders
TLDR
A systematic review and meta-analysis on controlled treatment trials of meta-cognitive therapy for anxiety disorders showed that MCT had statistically significant better results compared to the control groups in GAD, OCD, and PTSD.
Acceptance and Efficacy of Metacognitive Training (MCT) on Positive Symptoms and Delusions in Patients With Schizophrenia: A Meta-analysis Taking Into Account Important Moderators.
TLDR
This meta-analysis demonstrates that MCT exerts a small to moderate effect on delusions and positive symptoms and a large effect on acceptance of the intervention.
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The individual modularized MCT approach had a beneficial effect and is recommended to healthcare professionals as an application for patients with schizophrenia or delusional disorder.
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TLDR
More randomized trials that use standardized outcome measures, that use intention-to-treat analyses, and that follow-up participants at regular intervals after the intervention are needed to determine whether or not MCT should become a recommended adjunctive treatment for schizophrenia.
Metacognitive training for schizophrenia spectrum patients: a meta-analysis on outcome studies
TLDR
The studies so far do not support a positive effect for MCT on positive symptoms, delusions and data gathering, and the moderate to high heterogeneity in most analyses suggests that processes other than MCT alone have an impact on the results.
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TLDR
MCT and CBT were more effective than pharmacotherapy alone In treatment of MDD and showed significant improvement at post-treatment phase.
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