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A rating scale for mania: reliability, validity and sensitivity

R C Young, J T Biggs, V E Ziegler

    The British Journal of Psychiatry : the Journal of Mental Science
    |November 1, 1978
    PubMed
    Summary
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    The new eleven-item clinician-administered Mania Rating Scale (MRS) demonstrates high reliability and validity. This scale effectively measures mania severity and treatment response in patients.

    Area of Science:

    • Psychiatry
    • Clinical Psychology
    • Psychometric Evaluation

    Background:

    • Accurate assessment of mania severity is crucial for effective treatment.
    • Existing rating scales may have limitations in reliability or sensitivity.
    • Development of a robust clinician-administered scale is needed.

    Purpose of the Study:

    • To introduce and evaluate the psychometric properties of a new eleven-item clinician-administered Mania Rating Scale (MRS).
    • To assess the reliability, validity, and sensitivity to change of the MRS.

    Main Methods:

    • The eleven-item Mania Rating Scale (MRS) was administered by clinicians.
    • Inter-rater reliability was assessed using scores from two independent clinicians.
    • Concurrent validity was examined by correlating MRS scores with global ratings and other established mania scales.

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  • Sensitivity to change was evaluated by comparing scores before and after treatment and by correlating with hospital stay duration.

    • Main Results:

    • High inter-rater reliability was found for both total MRS scores (0.93) and individual item scores (0.66–0.92).
    • MRS scores showed high correlations with independent global ratings and other mania scales.
    • MRS scores correlated with subsequent hospital stay duration.
    • The scale demonstrated statistical significance in differentiating patients before and after treatment and in distinguishing severity levels.

    Conclusions:

    • The eleven-item clinician-administered Mania Rating Scale (MRS) is a reliable and valid instrument for assessing mania.
    • The MRS is sensitive to treatment changes and can differentiate mania severity.
    • This scale offers a valuable tool for clinical practice and research in bipolar disorder management.