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A Comparative Evaluation of the KDSQ-C, AD8, and SMCQ as a Cognitive Screening Test to Be Used in National Medical Check-ups in Korea

Title
A Comparative Evaluation of the KDSQ-C, AD8, and SMCQ as a Cognitive Screening Test to Be Used in National Medical Check-ups in Korea
Authors
Kim, AhroKim, SangYunPark, Kyung WonPark, Kee HyungYoun, Young ChulLee, Dong WooLee, Jun-YoungLee, Jun HongJeong, Jee HyangChoi, Seong HyeHan, Hyun JeongKim, SemiNa, SeungheePark, MisunYim, Hyeon WooYang, Dong Won
Ewha Authors
정지향
SCOPUS Author ID
정지향scopus
Issue Date
2019
Journal Title
JOURNAL OF KOREAN MEDICAL SCIENCE
ISSN
1011-8934JCR Link

1598-6357JCR Link
Citation
JOURNAL OF KOREAN MEDICAL SCIENCE vol. 34, no. 14
Keywords
CognitionDementiaSelf-ReportSelf-AssessmentQuestionnaire
Publisher
KOREAN ACAD MEDICAL SCIENCES
Indexed
SCIE; SCOPUS; KCI WOS scopus
Document Type
Article
Abstract
Background: Korea has a periodic general health check-up program that uses the Korean Dementia Screening Questionnaire-Cognition (KDSQ-C) as a cognitive dysfunction screening tool. The Alzheimer Disease 8 (AD8) and Subjective Memory Complaints Questionnaire (SMCQ) are also used in clinical practice. We compared the diagnostic ability of these screening questionnaires for cognitive impairment when completed by participants and their caregivers. Hence, we aimed to evaluate whether the SMCQ or AD8 is superior to the KDSQ-C and can be used as its replacement. Methods: A total of420 participants over 65 years and their informants were recruited from 11 hospitals for this study. The patients were grouped into normal cognition, mild cognitive impairment, and dementia subgroups. The KDSQ-C, AD8, and SMCQ were completed separately by participants and their informants. Results: A receiver operating characteristic analysis of questionnaire scores completed by participants showed that the areas under the curve (AUCs) for the KDSQ-C, AD8, and SMCQ for diagnosing dementia were 0.75, 0.8, and 0.73, respectively. Regarding informant-completed questionnaires, the AD8 (AUC of 0.93), KDSQ-C (AUC of 0.92), and SMCQ (AUC of 0.92) showed good discriminability for dementia, with no differences in discriminability between the questionnaires. Conclusion: When an informant-report is possible, we recommend that the KDSQ-C continues to be used in national medical check-ups as its discriminability for dementia is not different from that of the AD8 or SMCQ. Moreover, consistent data collection using the same questionnaire is important. When an informant is not available, either the KDSQ-C or AD8 may be used. However, in the cases of patient-reports, discriminability is lower than that for informant-completed questionnaires.
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DOI
10.3346/jkms.2019.34.e111
Appears in Collections:
의과대학 > 의학과 > Journal papers
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