PMID: 9186787May 1, 1997Paper

Clinical subtypes of bipolar mixed states: validating a broader European definition in 143 cases

Journal of Affective Disorders
G PerugiG B Cassano

Abstract

To validate and clinically characterize mixed bipolar states derived from the concepts of Kraepelin and the Vienna School and defined as sustained instability of affective manifestations of opposite polarity--that usually fluctuate independently of one another--in the setting of marked emotional perplexity. Our criteria for mixed states represent a modified "user-friendly" operationalization of these classical concepts. We compared 143 mixed state patients, so defined, with 118 DSM III-R manic patients, systematically evaluated with the Semistructured Interview for Depression (SID) in our in-patient and day-hospital facilities. The two groups were comparable from demographic and familial standpoints (including family history for bipolar disorder). Mixed states were predominant in the past history of index mixed patients who were more likely to have experienced stressors and to have attempted suicide; manic and hypomanic episodes were more common in the past history of the index manic patients who, in addition, had more episodes and hospitalizations. Although rates of chronicity and rapid cycling were not significantly different in the two groups, the modal episodes in the mixed states were 3-6 months, and in mania they were les...Continue Reading

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