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KMID : 1130620200160010145
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Journal of Clinical Neurology
2020 Volume.16 No. 1 p.145 ~ p.153
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Reliability and Validity of a Short Form of the Korean Dementia Screening Questionnaire-Cognition
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Kim Ah-Ro
Kim Sang-Yun
Park Kyung-Won
Park Kee-Hyung
Youn Young-Chul
Lee Dong-Woo
Lee Jun-Young
Lee Jun-Hong
Jeong Jee-Hyang
Choi Seong-Hye
Han Hyun-Jeong
Kim Se-Mi
Na Seung-Hee
Park Mi-Sun
Yim Hyeon-Woo
Yang Dong-Won
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Abstract
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Background and Purpose: We aimed to determine the reliability and validity of a short form of the Korean Dementia Screening Questionnaire-Cognition (KDSQ-C) as a screening tool for cognitive dysfunction.
Methods: This study recruited 420 patients older than 65 years and their informants from 11 hospitals, and categorized the patients into normal cognition, mild cognitive impairment, and dementia subgroups. The KDSQ-C was completed separately by the patients and their informants. We abstracted three components of the KDSQ-C and combined these components into the following four subscales: KDSQ-C-I (items 1?5, memory domain), KDSQ-C-II (items 1?5 & 11?15, memory domain+activities of daily living), KDSQ-C-III (items 1?5 & 6?10, memory domain+other cognitive domains), and KDSQ-C-IV (items 6?10 & 11?15, other cognitive domains+activities of daily living). The reliability and validity were compared between these four subscales.
Results: A receiver operating characteristic (ROC) analysis of questionnaire scores provided by the patients showed that the areas under the ROC curves (AUCs) for the KDSQ-C, KDSQC-I, and KDSQ-C-II for diagnosing dementia were 0.75, 0.72, and 0.76, respectively; the corresponding AUCs for informant-completed questionnaires were 0.92, 0.89, and 0.92, indicating good discriminability for dementia.
Conclusions: A short form of the patient- and informant-rated versions of the KDSQ-C (KDSQ-C-II) is as capable as the 15-item KDSQ-C in screening for dementia.
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KEYWORD
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cognition, dementia, self report, self-assessment, questionnaire
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