Bipolar disorder, cycloid psychosis and schizophrenia: A study using 'lifetime' psychopathology ratings, factor analysis and canonical variate analysis

I. F. Brockington, A. Roper, M. Buckley, J. Copas, C. Andrade, P. Wigg, A. Farmer, C. Kaufman, R. Hawley, H. Y. Meltzer

Research output: Contribution to journalArticlepeer-review

10 Scopus citations

Abstract

In an empirical study on the classification of the psychoses, 302 patients were rated using the Longitudinal Psychopathology Schedule. The data were condensed by factor analysis, which yielded 10 factors - mania and schizomania, depression and suicidal activity, and 6 factors concerned with psychotic symptoms (verbal hallucinosis/passivity, delusion formation, defect symptoms, social decline, cycloid symptomatology and a factor loading depressive auditory hallucinations and visual hallucinations). Provisional diagnostic groups were obtained using DSM III. Discriminant function analyses showed that the only clearly distinct diagnostic group was bipolar disorder, and this was true for various definitions. Canonical variate analyses were performed using 3- and 4-criterion groups. These showed that a group corresponding approximately to cycloid psychosis also met criteria for being a distinct group. The most detailed examination of the data, using 4-criterion groups and serial reclassification, suggested that the psychoses might fall into 5 groups - bipolar disorder, cycloid psychosis, depression, defect states and schizoaffective depression.

Original languageEnglish (US)
Pages (from-to)223-236
Number of pages14
JournalEuropean Psychiatry
Volume6
Issue number5
StatePublished - Dec 1 1991

ASJC Scopus subject areas

  • Psychiatry and Mental health

Fingerprint Dive into the research topics of 'Bipolar disorder, cycloid psychosis and schizophrenia: A study using 'lifetime' psychopathology ratings, factor analysis and canonical variate analysis'. Together they form a unique fingerprint.

Cite this