Document Detail


Self-perceived cognitive functioning and its relationship with objective performance in first-episode schizophrenia: The Subjective Cognitive Impairment Scale.
MedLine Citation:
PMID:  25459418     Owner:  NLM     Status:  Publisher    
Abstract/OtherAbstract:
BACKGROUND: Self-perceived cognitive dysfunction is under-recognized in clinical practice and under-studied in schizophrenia, particularly in the early illness stage. Findings on the relationship between subjective and objective cognitive measures were inconsistent. This study aimed to examine psychometric properties of a newly developed scale, Subjective Cognitive Impairment Scale (SCIS) and to investigate the relationship of self-reported ratings with objective test performance in first-episode schizophrenia.
METHODS: One hundred one Chinese patients aged 18 to 64years presenting with first episode schizophrenia-spectrum disorder were studied. A comprehensive set of assessments examining objective cognitive functioning, clinical and treatment characteristic were administered. Internal consistency, factor structure and construct validity of SCIS were evaluated. Correlations of scale score with objective cognitive measures, clinical and treatment variables were examined.
RESULTS: A single-factor underlying the structure of SCIS items was demonstrated by principal components analysis. Cronbach's alpha coefficient for the scale was 0.92. SCIS score was positively correlated with depression and anxiety symptom severity, and duration of untreated psychosis. SCIS score was not associated with other symptom dimensions, insight and chlorpromazine equivalents. No significant correlations were observed between SCIS score and objective cognitive measures with the exception of letter-number span test.
CONCLUSION: Our results provided preliminary evidence in support of reliability and validity of SCIS in evaluating patient's cognitive complaints. A lack of correspondence between subjective and objective cognitive functioning suggested that they may represent two distinct constructs with potentially differential therapeutic implications. Further research is warranted to examine ecological validity and clinical utility of the scale.
Authors:
Wing Chung Chang; Tracey Chi Wan Chan; Shirley Sanyin Chiu; Christy Lai Ming Hui; Sherry Kit Wa Chan; Edwin Ho Ming Lee; Eric Yu Hai Chen
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Publication Detail:
Type:  JOURNAL ARTICLE     Date:  2014-10-8
Journal Detail:
Title:  Comprehensive psychiatry     Volume:  -     ISSN:  1532-8384     ISO Abbreviation:  Compr Psychiatry     Publication Date:  2014 Oct 
Date Detail:
Created Date:  2014-12-2     Completed Date:  -     Revised Date:  2014-12-3    
Medline Journal Info:
Nlm Unique ID:  0372612     Medline TA:  Compr Psychiatry     Country:  -    
Other Details:
Languages:  ENG     Pagination:  -     Citation Subset:  -    
Copyright Information:
Copyright © 2014 Elsevier Inc. All rights reserved.
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