Development and psychometric properties of the Emotional State Questionnaire, a self-report questionnaire for depression and anxiety
Nordic Journal of PsychiatryPublished 1 January 1999
Jakov Shlik Anu Aluoja
Citations87
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TL;DR
A new self-report questionnaire for depression and anxiety (Emotional State Questionnaire (EST-Q), derived from diagnostic criteria of DSM-IV and ICD-10, is introduced and data on its reliability and validity is presented.
Abstract
Anxiety and depression are dimensions of emotional state that can be validly assessed with self-report measures. This article introduces a new self-report questionnaire for depression and anxiety (Emotional State Questionnaire (EST-Q)) and presents data on its reliability and validity. The items of the EST-Q were derived from diagnostic criteria of DSM-IV and ICD-10. Thirty-three items were rated on a five-point frequency scale. The questionnaire was administered to 194 inpatients with depressive and anxiety disorders and to a population sample of 479 subjects. According to the results of factor analysis, five subscales were formed: Depression, Anxiety, Agoraphobia‐Panic, Fatigue, and Insomnia. EST-Q and subscales showed acceptable internal consistency (a 0.69‐0.88). Significant differences in subscales between patients and population and across diagnostic groups confirmed the discriminant validity of the instrument. Depression, Anxiety, and Agoraphobia‐Panic subscales distinguished corresponding diagnostic groups. Fatigue and Insomnia appeared to assess nonspecific psychopathology dimensions characteristic of several psychiatric disorders. • Agoraphobia, Anxiety, Depression, Questionnaires.
Keywords
Psychology
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