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Heterogeneity of cycloid psychoses: a latent class analysis

Published online by Cambridge University Press:  01 May 2000

RAMIN MOJTABAI
RAMIN MOJTABAI
Affiliation:
Department of Psychiatry, College of Physicians and Surgeons, Columbia University, New York, NY, USA
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Abstract

Background. Three hypotheses have been proposed in regard to the origin of cycloid psychoses: (1) they are an independent nosological entity; (2) they are atypical cases of affective disorders; and (3) they are a heterogeneous group of disorders. This study examined the heterogeneity hypothesis by attempting to delineate distinct affective and non-affective subgroups.

Methods. In 60 cases drawn from a classic study of cycloid psychoses by Perris (1974), latent class analysis was used to delineate subgroups.

Results. Two classes were identified in the analysis: one characterized by the convergence of affective symptoms and family history of affective disorders and the other by the relative paucity of such features.

Conclusions. Cycloid psychoses are composed of at least two subgroups, distinguishable on the basis of symptoms and family history.

Type
BRIEF COMMUNICATION
Information
Psychological Medicine , Volume 30 , Issue 3 , May 2000 , pp. 721 - 726
Copyright
© 2000 Cambridge University Press

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