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Depression, delusions, and suicide.

S P Roose, A H Glassman, B T Walsh

    The American Journal of Psychiatry
    |September 1, 1983
    PubMed
    Summary
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    Delusions in unipolar depression significantly increase suicide risk. Patients with delusional depression were five times more likely to commit suicide compared to those without delusions.

    Area of Science:

    • Psychiatry
    • Mental Health Research
    • Epidemiology

    Background:

    • Suicide remains a significant public health concern, particularly among individuals with mood disorders.
    • Understanding specific risk factors within depression subtypes is crucial for targeted prevention strategies.

    Purpose of the Study:

    • To investigate the association between delusional symptoms and suicide risk in patients with unipolar depression.
    • To quantify the increased likelihood of suicide in delusional versus non-delusional unipolar depression.

    Main Methods:

    • Retrospective analysis of suicide cases over 25 years at the New York State Psychiatric Institute.
    • Diagnostic assignment using Research Diagnostic Criteria and DSM-III.
    • Comparison with a control group of non-suicidal depressed patients from the same institution.

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    Main Results:

    • Fourteen cases of unipolar endogenous depression among suicide decedents were identified.
    • Ten of these 14 cases (71%) exhibited delusional or probably delusional features.
    • A significantly higher prevalence of delusional depression was observed in the suicide group compared to the control group.

    Conclusions:

    • Delusions represent a significant risk factor for suicide in patients diagnosed with unipolar depression.
    • Delusionally depressed patients demonstrated a five-fold increased likelihood of suicide compared to non-delusional depressed patients.
    • These findings underscore the importance of assessing for psychotic features in depressed individuals to identify those at highest suicide risk.