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Schizophr Res. 1997 Feb 28;23(3):231-8.

Factor-derived subsyndromes of schizophrenia and familial morbid risks.

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Department of Psychological Medicine, University of Wales College of Medicine, Heath Park, Cardiff, UK.


Factor analysis was performed on OPCRIT checklist ratings from 66 patients with RDC schizophrenia. Eight substantive factors were found, characterised respectively by: positive formal thought disorder; first rank delusions; first rank hallucinations; inappropriate affect/bizarre behaviour; negative symptoms; grandiose/bizarre delusions; delusions of influence/persecution; and other hallucinations. A history of schizophrenia and other non-affective psychoses was ascertained in the probands' first-degree relatives using a family history approach. Illness in relatives was best predicted by probands' scores on subsyndromes derived from the inappropriate affect/bizarre behaviour and positive formal thought disorder factors.

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