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Related Experiment Videos

The inventory to diagnose depression, lifetime version.

M Zimmerman, W Coryell

    Acta Psychiatrica Scandinavica
    |May 1, 1987
    PubMed
    Summary
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    The Inventory to Diagnose Depression (IDDL) effectively screens for lifetime major depressive disorder (MDD). This self-report scale demonstrates strong reliability and accuracy in identifying individuals with a history of depression.

    Area of Science:

    • Psychiatry
    • Psychometrics
    • Mental Health Assessment

    Background:

    • Major depressive disorder (MDD) is a significant mental health concern.
    • Accurate lifetime diagnosis of MDD is crucial for effective treatment.
    • Self-report measures offer a practical approach to screening for depressive disorders.

    Purpose of the Study:

    • To evaluate the psychometric properties and diagnostic accuracy of the lifetime version of the Inventory to Diagnose Depression (IDDL).
    • To assess the reliability and validity of the IDDL compared to a structured clinical interview.

    Main Methods:

    • The study involved 164 first-degree relatives of healthy controls.
    • Participants completed the 22-item Inventory to Diagnose Depression (IDDL) self-report scale.

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  • The Diagnostic Interview Schedule (DIS) was used as the criterion standard for diagnosis.

    • Main Results:

    • The IDDL exhibited excellent internal consistency (Cronbach's alpha = 0.92) and split-half reliability (Spearman-Brown = 0.90).
    • The sensitivity of the IDDL was 74%, and its specificity was 93% when compared to the DIS.
    • Chance-corrected agreement (kappa) between IDDL and DIS was 0.60.

    Conclusions:

    • The lifetime version of the IDDL is a reliable and valid instrument for diagnosing a lifetime history of major depressive disorder (MDD).
    • The IDDL demonstrates good sensitivity and high specificity, making it a valuable tool for epidemiological studies and clinical screening.