A symptom self-rating scale for schizophrenia (4s): psychometric properties, reliability and validity

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A symptom self-rating scale for schizophrenia (4s): psychometric properties, reliability and validity

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Publication Article, peer reviewed scientific
Title A symptom self-rating scale for schizophrenia (4s): psychometric properties, reliability and validity
Author(s) Lindström, Eva ; Jedenius, Erik ; Levander, Sten
Date 2009
English abstract
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.
DOI http://dx.doi.org/10.1080/08039480902807/298 (link to publisher's fulltext)
Publisher informa healthcare
Host/Issue Nordic journal of psychiatry;5
Volume 63
ISSN 0803-9488
Pages 368-374
Language eng (iso)
Subject(s) Medicine
Research Subject Categories::MEDICINE::Psychiatry
Handle http://hdl.handle.net/2043/9335 (link to this page)

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