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  • Title: Endogenous depression as a construct: a quantitative analysis of the literature and a study of clinician judgements.
    Author: Parker G, Hadzi-Pavlovic D, Boyce P.
    Journal: Aust N Z J Psychiatry; 1989 Sep; 23(3):357-68. PubMed ID: 2803148.
    Abstract:
    We review the concept of endogenous depression historically and undertake quantitative analyses of representative factor analytic studies. We also report an empirical study, isolating symptoms and signs associated with a clinical diagnosis of psychotic/endogenous depression, made by a large number of clinical raters assessing 300 depressives. The quantitative analyses and the study of practising psychiatrists agreed in delineating depressive type and together suggest a more restricted construct of endogenous and psychotic depression than has been held historically. Key clinical features isolated were severity, retardation, delusions and paranoid features, non-reactivity and non-variability in mood, while vegetative features appeared to lack relevance.
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