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Conversion From The Korean Dementia Screening Questionnaire To The Informant Questionnaire On Cognitive Decline In The Elderly

Authors
Yeo, Tae YoungKim, KeonyeupPark, Moon Ho
Issue Date
2019
Publisher
DOVE MEDICAL PRESS LTD
Keywords
KDSQ; IQCODE; cognition; equation
Citation
NEUROPSYCHIATRIC DISEASE AND TREATMENT, v.15, pp.3205 - 3211
Indexed
SCIE
SCOPUS
Journal Title
NEUROPSYCHIATRIC DISEASE AND TREATMENT
Volume
15
Start Page
3205
End Page
3211
URI
https://scholar.korea.ac.kr/handle/2021.sw.korea/68951
DOI
10.2147/NDT.S229555
ISSN
1176-6328
Abstract
Purpose: The ability to convert scores between cognitive measurements would facilitate the longitudinal assessment of cognition in clinical practice and the comparison and synthesis of cognitive data from international, multicenter, or longitudinal studies. The primary aim of this study was to apply a simple and reliable method for converting scores from the Korean Dementia Screening Questionnaire (KDSQ) to those of the Informant Questionnaire on Cognitive Decline in the Elderly (IQCODE). Patients and methods: A total of 627 participants, with and without cognitive dysfunction, received both the KDSQ and the IQCODE at the same visit. The scores of both tools were calculated, and equipercentile equating was used to create a method for converting scores from the KDSQ to the IQCODE. Results: KDSQ scores were highly correlated with IQCODE scores (Pearson r = 0.905, P < 0.01). We developed scores for converting the KDSQ to the IQCODE using equipercentile equating and log-linear smoothing We provide an easy-to-use table that enables the conversion of KDSQ scores to IQCODE scores. Conclusion: We delivered a simple and reliable method for converting scores from the KDSQ to the IQCODE. The conversion score table reported here enables direct and easy comparison of these cognitive measurements in older adults.
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