Premorbid self-disorders and lifetime diagnosis in the schizophrenia spectrum: a prospective high-risk study

Josef Parnas, John Carter, Julie Elisabeth Nordgaard Frederiksen

    36 Citationer (Scopus)

    Abstract

    AIM: The notion of a disordered self as a core disturbance of schizophrenia was proposed in many foundational texts. Recent studies, spurred by the development of the Examination of Anomalous Self-Experience (EASE), seem to indicate that self-disorders are a specific manifestation of schizophrenia vulnerability. Follow-up studies of help-seeking, prodromal and first-admission patients have demonstrated the utility of self-disorders for predicting later schizophrenia-spectrum disturbance. We wished to extend these findings by gauging the predictive value of self-disorders in a premorbid, non-clinical population at high risk for schizophrenia.

    METHODS: Children from the Copenhagen High-Risk Project with high-genetic risk for schizophrenia (N = 212) were assessed premorbidly (average age = 15), and diagnostically re-evaluated after 10 and 25 years. Since the EASE was not available at the time of premorbid assessment, we hypothesized that a proxy scale drawn from the Minnesota Multiphasic Personality Inventory (MMPI) could distinguish those who later developed a schizophrenia-spectrum disorder (N = 68) from those who remained healthy (N = 64). The Self-Disorder Scale comprised 32 items whose content suggested an aspect of self-disorder as measured by the EASE.

    RESULTS: Premorbid Self-Disorder Scale scores significantly predicted lifetime schizophrenia-spectrum diagnosis in the high-risk cohort. Although there was considerable item overlap between the new scale and an existing MMPI scale (psychoticism), the overlap did not account for the Self-Disorder Scale's predictive efficacy.

    CONCLUSION: The results support the notion of self-disorders as a core vulnerability feature in schizophrenia, detectable premorbidly in those developing later schizophrenia-spectrum disorders.

    OriginalsprogEngelsk
    TidsskriftEarly Intervention in Psychiatry
    Vol/bind10
    Udgave nummer1
    Sider (fra-til)45-53
    Antal sider9
    ISSN1751-7885
    DOI
    StatusUdgivet - 2016

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