Document Detail

The scoring scheme of the informant questionnaire on cognitive decline in the elderly needs revision: results of rasch analysis.
MedLine Citation:
PMID:  15286455     Owner:  NLM     Status:  MEDLINE    
The purpose of this study was to examine the optimal scoring scheme (category use), unidimensionality, item fit, and redundancy of the Informant Questionnaire on Cognitive Decline in the Elderly (IQCODE) in a cohort of Hong Kong Chinese stroke survivors. At 3 months after the index stroke, a research assistant administered the IQCODE to relatives of 284 Chinese patients with acute stroke who were consecutively admitted to a general hospital. A psychiatrist, who was blinded to the IQCODE scores, interviewed all 284 patients and made DSM-IV diagnosis of dementia, which served as the benchmark for judging the performance of IQCODE in screening dementia. The results suggest that the optimal IQCODE scoring scheme has 2 rather than the original 5 categories. Although the IQCODE was unidimensional overall, there was evidence of item redundancy, thus indicating that a shortened version is desirable.
Wai Kwong Tang; Eric Wong; Sandra S M Chan; Helen F K Chiu; Ka Sing Wong; Timothy C Y Kwok; Vincent Mok; Gabor S Ungvari
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Publication Detail:
Type:  Journal Article; Validation Studies     Date:  2004-07-29
Journal Detail:
Title:  Dementia and geriatric cognitive disorders     Volume:  18     ISSN:  1420-8008     ISO Abbreviation:  Dement Geriatr Cogn Disord     Publication Date:  2004  
Date Detail:
Created Date:  2004-10-01     Completed Date:  2005-02-16     Revised Date:  2008-03-24    
Medline Journal Info:
Nlm Unique ID:  9705200     Medline TA:  Dement Geriatr Cogn Disord     Country:  Switzerland    
Other Details:
Languages:  eng     Pagination:  250-6     Citation Subset:  IM    
Copyright Information:
2004 S. Karger AG, Basel
Department of Psychiatry, School of Public Health, Chinese University of Hong Kong, Hong Kong, SAR, China.
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MeSH Terms
Cognition Disorders / diagnosis*,  epidemiology*,  ethnology
Cohort Studies
Diagnostic and Statistical Manual of Mental Disorders
Health Services Needs and Demand*
Hong Kong / ethnology
Neuropsychological Tests
Reproducibility of Results
Sensitivity and Specificity
Severity of Illness Index

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