Meta-analysis reviews psychosis prevalence in bipolar disorder patients across 285 studies
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Key Takeaway
Note that mood-incongruent psychosis is quite prevalent at 47% in bipolar disorder patients.
This meta-analysis evaluates the prevalence of psychosis and psychotic symptoms among patients with bipolar disorder by synthesizing data from 285 studies. The scope covers diagnostic comorbidity and specific symptom types without detailing specific interventions or comparators. The authors report that the comorbidity of schizophrenia diagnoses in bipolar patients is low, with an effect size of 8%.
The review highlights that mood-incongruent psychosis is quite prevalent, affecting 47% of the population. Additionally, psychotic symptoms are described as common in this patient group. Regarding specific symptomatology, delusions were more common than hallucinations and thought disorders. The analysis does not provide absolute numbers or confidence intervals for these specific outcomes.
Safety data, including adverse events, serious adverse events, discontinuations, and tolerability, were not reported in the included studies. The authors acknowledge these gaps in the available evidence. The review does not establish causality and limits conclusions to prevalence estimates rather than treatment effects. Practice relevance is framed cautiously due to the observational nature of the pooled data and the lack of reported safety profiles.
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View Original Abstract ↓
BACKGROUND: The boundary between bipolar disorder and schizophrenia has long been blurred by the shared psychopathology, genetic risk, and social factors. This study aims to examine the prevalence of psychosis and psychotic symptoms in bipolar patients.
METHOD: Key words 'bipolar', 'psychosis', 'schizophrenia', and the variants were searched in titles and abstracts using Medline, Psych INFO and Web of Science and forward and backward citation searches were conducted; effects were computed using single proportion analysis with double arcsine transformation.
RESULTS: The final analysis comprised 285 studies. The comorbidity of schizophrenia diagnoses in bipolar patients was low (8%). However, more broadly defined mood incongruent psychosis was quite prevalent (47%). Similarly, psychotic symptoms were common in bipolar patients, specifically those with a type I diagnosis or manic episode; delusions were more common than hallucinations and thought disorders.
CONCLUSIONS: Significant overlap in phenomenology and psychopathology was observed between bipolar disorder and schizophrenia in this review. Future research should focus on comparing patients with similar symptoms and exploring the shared processes that contribute to these symptoms.
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