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Abstract

The psychometric properties of the 28- and 30-item versions of the Inventory of Depressive Symptomatology, Clinician-Rated (IDS-C) and Self-Report (IDS-SR) are reported in a total of 434 (28-item) and 337 (30-item) adult out-patients with current major depressive disorder and 118 adult euthymic subjects (15 remitted depressed and 103 normal controls). Cronbach's alpha ranged from 0.92 to 0.94 for the total sample and from 0.76 to 0.82 for those with current depression. Item total correlations, as well as several tests of concurrent and discriminant validity are reported. Factor analysis revealed three dimensions (cognitive/mood, anxiety/arousal and vegetative) for each scale. Analysis of sensitivity to change in symptom severity in an open-label trial of fluoxetine (N = 58) showed that the IDS-C and IDS-SR were highly related to the 17-item Hamilton Rating Scale for Depression. Given the more complete item coverage, satisfactory psychometric properties, and high correlations with the above standard ratings, the 30-item IDS-C and IDS-SR can be used to evaluate depressive symptom severity. The availability of similar item content for clinician-rated and self-reported versions allows more direct evaluations of these two perspectives.

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Most cited references 2

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The definition and operational criteria for treatment outcome of major depressive disorder. A review of the current research literature.

R Prien, L Carpenter, D Kupfer (1991)

A review of research articles published in nine journals over a 2-year period was conducted to determine how critical changes in the clinical course of depressive disorder are defined in the research literature. These change points, labeled by terms such as response, recovery, and relapse, are critical for evaluation and communication of study results. The review focused on studies of unipolar depression that used a criterion-based diagnostic system and involved some form of therapeutic maneuver. The review showed significant inconsistency in the labeling and definition of change points and indicated the need for more precise conceptual definitions and operational criteria to enhance comparison, generalization, and application of results from clinical studies of depression.