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  • Title: A clinically useful depression outcome scale.
    Author: Zimmerman M, Chelminski I, McGlinchey JB, Posternak MA.
    Journal: Compr Psychiatry; 2008; 49(2):131-40. PubMed ID: 18243884.
    Abstract:
    If the optimal delivery of mental health treatment ultimately depends on examining outcome, then precise, reliable, valid, informative, and user-friendly measurement is the key to evaluating the quality and efficiency of care in clinical practice. Self-report questionnaires are a cost-effective option because they are inexpensive in terms of professional time needed for administration, and they correlate highly with clinician ratings. In the present report from the Rhode Island Methods to Improve Diagnostic Assessment and Services (MIDAS) project, we describe the reliability and validity of the Clinically Useful Depression Outcome Scale (CUDOS). The CUDOS was designed to be brief (completed in less than 3 minutes), quickly scored (in less than 15 seconds), clinically useful (fully covering the Diagnostic and Statistical Manual of Mental Disorders, Fourth Edition symptoms of major depressive disorder and dysthymic disorder), reliable, valid, and sensitive to change. We studied the CUDOS in more than 1400 psychiatric outpatients and found that the scale had high internal consistency and test-retest reliability. The CUDOS was more highly correlated with another self-report measure of depression than with measures of anxiety, substance use problems, eating disorders, and somatization, thereby supporting the convergent and discriminant validity of the scale. The CUDOS was also highly correlated with interviewer ratings of the severity of depression, and CUDOS scores were significantly different in depressed patients with mild, moderate, and severe levels of depression. The CUDOS was a valid measure of symptom change. Finally, the CUDOS was significantly associated with a diagnosis of major depressive disorder. Thus, the results of this large validation study of the CUDOS shows that it is a reliable and valid measure of depression that is feasible to incorporate into routine clinical practice.
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