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A symptom Self-rating Scale for Schizophrenia (4S): Psychometric properties, reliability and validity
Uppsala University, Disciplinary Domain of Medicine and Pharmacy, Faculty of Medicine, Department of Neuroscience, Psychiatry, University Hospital.
2009 (English)In: Nordic Journal of Psychiatry, ISSN 0803-9488, E-ISSN 1502-4725, Vol. 63, no 5, 368-374 p.Article in journal (Refereed) Published
Abstract [en]

The objective of the study was to validate a self-administrated symptom rating scale for use in patients with schizophrenia spectrum disorders by item analysis, exploration of factor structure, and analyses of reliability and validity. Data on 151 patients, initially treated by risperidone, obtained within the framework of a naturalistic Phase IV longitudinal study, were analysed by comparing patient and clinician ratings of symptoms, side-effects and global indices of illness. The Symptom Self-rating Scale for Schizophrenia (4S) is psychometrically adequate (item analysis, internal consistency, factor structure). Side-effect ratings were reliable. Symptom ratings displayed consistent associations with clinicians' ratings of corresponding symptom dimensions, suggesting construct validity. Patients had most difficulties assessing negative symptom items. Patients were well able to assess their own symptoms and drug side-effects. The factor structure of symptom ratings differs between patients and clinicians as well as how they construe global indices of illness. Clinicians focus on psychotic, patients on affective symptoms. Use of symptom self-ratings is one way to improve communication and thereby strengthen the therapeutic alliance and increase treatment adherence.

Place, publisher, year, edition, pages
2009. Vol. 63, no 5, 368-374 p.
Keyword [en]
CGI, GAF, Psychosis, Risperidone, Self-ratings, Side-effects, Symptoms
National Category
Medical and Health Sciences
URN: urn:nbn:se:uu:diva-139537DOI: 10.1080/08039480902807298ISI: 000270173200003PubMedID: 19306156OAI: oai:DiVA.org:uu-139537DiVA: diva2:381584
Available from: 2010-12-28 Created: 2010-12-28 Last updated: 2010-12-28Bibliographically approved

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