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    Acta Psychiatr Scand. 1993 Aug;88(2):121-3.

    Patterns of treatment resistance in bipolar affective disorder.

    Source

    Department of Psychiatry, School of Neuroscience, University of Newcastle upon Tyne, United Kingdom.

    Abstract

    The mean index episode length in 19 consecutive admissions with treatment-resistant bipolar affective disorder was 21.7 months. Four patterns of resistance were identified: rapid cycling (37%), other forms of cycling (32%), chronic depression (26%) and mixed states (6%). Female gender was significantly associated with rapid cycling. Other risk factors for treatment-resistant bipolar disorder, including a high prevalence of family history of affective disorder (72%) and electroencephalographic abnormalities (54% of recordings), were not confined to the rapid cycling group.

    PMID:
    8213204
    [PubMed - indexed for MEDLINE]

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