Martí Santacana1, Miquel A Fullana2, Albert Bonillo3, Miriam Morales4, María Montoro5, Sílvia Rosado6, Roser Guillamat5, Vicenç Vallès5, Víctor Pérez7, Antoni Bulbena6. 1. Department of Mental Health, Consorci Sanitari de Terrassa, Spain; Department of Psychiatry and Legal Medicine, Universitat Autònoma de Barcelona, Spain. 2. Department of Psychiatry and Legal Medicine, Universitat Autònoma de Barcelona, Spain; Institute of Neuropsychiatry and Addictions, Hospital del Mar, Barcelona, Spain. Electronic address: miguelangelfullana@gmail.com. 3. Department of Psychobiology and Methodology of Health Sciences, Universitat Autònoma de Barcelona, Spain. 4. Department of Psychiatry, Hospital Universitari Mútua de Terrassa, Spain. 5. Department of Mental Health, Consorci Sanitari de Terrassa, Spain. 6. Institute of Neuropsychiatry and Addictions, Hospital del Mar, Barcelona, Spain. 7. Institute of Neuropsychiatry and Addictions, Hospital del Mar, Barcelona, Spain; CIBERSAM (Centro de Investigación en Red de Salud Mental), Instituto de Salud Carlos III, Spain.
Abstract
OBJECTIVE: The goal of the study was to assess the psychometric properties and the factor structure of the Spanish self-report version of the Panic Disorder Severity Scale (PDSS-SR). METHOD: One hundred and twenty four patients meeting DSM-IV criteria for panic disorder were assessed with the Spanish PDSS-SR, the Anxiety Sensitivity Index-3 (ASI-3), the Sheehan Disability Inventory (SDI) and the Beck Depression Inventory-II (BDI-II). Cronbach's alpha was used to evaluate internal consistency. Pearson correlations were used to evaluate test-retest reliability, convergent and divergent validity. Sensitivity to change data was obtained for 91 patients that had completed a cognitive behavioural therapy. The factor structure was analysed using a confirmatory factor analysis (CFA). RESULTS: The Spanish PDSS-SR showed excellent internal consistency, good test-retest reliability and adequate convergent validity. Regarding divergent validity, the correlation with the BDI-II was larger than expected. The Spanish PDSS-SR was sensitive to change. Our CFA suggested a two-factor model for the scale. CONCLUSIONS: The Spanish PDSS-SR has similar psychometric properties as the previous versions of the PDSS-SR and it can become a useful instrument to assess panic symptoms in clinical and research settings in Spanish-speaking countries.
OBJECTIVE: The goal of the study was to assess the psychometric properties and the factor structure of the Spanish self-report version of the Panic Disorder Severity Scale (PDSS-SR). METHOD: One hundred and twenty four patients meeting DSM-IV criteria for panic disorder were assessed with the Spanish PDSS-SR, the Anxiety Sensitivity Index-3 (ASI-3), the Sheehan Disability Inventory (SDI) and the Beck Depression Inventory-II (BDI-II). Cronbach's alpha was used to evaluate internal consistency. Pearson correlations were used to evaluate test-retest reliability, convergent and divergent validity. Sensitivity to change data was obtained for 91 patients that had completed a cognitive behavioural therapy. The factor structure was analysed using a confirmatory factor analysis (CFA). RESULTS: The Spanish PDSS-SR showed excellent internal consistency, good test-retest reliability and adequate convergent validity. Regarding divergent validity, the correlation with the BDI-II was larger than expected. The Spanish PDSS-SR was sensitive to change. Our CFA suggested a two-factor model for the scale. CONCLUSIONS: The Spanish PDSS-SR has similar psychometric properties as the previous versions of the PDSS-SR and it can become a useful instrument to assess panic symptoms in clinical and research settings in Spanish-speaking countries.
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