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Prevalence of mixed mania using 3 definitions
1Bipolar Disorder Programme, Institut Clínic de Neurociencies, Hospital Clinic, IDIBAPS, Universitat de Barcelona, CIBERSAM, Barcelona, Catalonia, Spain. evieta@clinic.ub.es
Journal of Affective Disorders
|July 15, 2010
Summary
Diagnosing mixed episodes in bipolar disorder (BD) is challenging due to varying criteria. Current diagnostic systems capture only a limited proportion of patients, necessitating revised definitions for better therapeutic management.
Area of Science:
- Psychiatry
- Clinical Psychology
- Neuroscience
Background:
- Mixed episodes in bipolar disorder (BD) present a complex clinical challenge, characterized by concurrent manic and depressive symptoms.
- Accurate diagnosis is crucial for effective treatment and management of BD patients experiencing mixed states.
Purpose of the Study:
- To determine the proportion of bipolar I disorder patients experiencing depressive symptoms during acute episodes.
- To evaluate the validity and concordance of current diagnostic criteria (DSM-IV-TR, ICD-10, McElroy) for mixed episodes in BD.
Main Methods:
- A cross-sectional, multicenter study involving 368 hospitalized bipolar I disorder patients across 76 centers.
- Patients were assessed using the Clinical Global Impression-Bipolar (CGI-BP-M), Hamilton Depression Rating Scale (HAMD-17), and Young Mania Rating Scale (YMRS).
- Diagnostic criteria for mixed episodes (DSM-IV-TR, ICD-10, McElroy) and clinical judgment were recorded upon admission.
Main Results:
- Prevalence estimates for mixed episodes varied significantly across criteria: DSM-IV-TR (12.9%), ICD-10 (9%), McElroy (16.7%), and clinical judgment (23.2%).
- Statistically significant differences were observed in prevalence rates (p<0.0001).
- Concordance was highest between McElroy and ICD-10 criteria (Kappa=0.66), with moderate concordance for DSM-IV-TR with other criteria.
Conclusions:
- Current diagnostic systems (DSM-IV, ICD-10) inadequately capture patients with mixed episodes in bipolar disorder.
- The definition and diagnostic criteria for mixed episodes require revision to improve diagnostic consensus and therapeutic management.
- Limitations in current diagnostic approaches impact the effective treatment of bipolar disorder patients.
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