{"status":"ok","message-type":"work","message-version":"1.0.0","message":{"indexed":{"date-parts":[[2026,10,8]],"date-time":"2026-10-08T23:04:13Z","timestamp":1791500653510,"version":"4.3.4"},"reference-count":36,"publisher":"SAGE Publications","issue":"4","content-domain":{"domain":[],"crossmark-restriction":false},"short-container-title":["JAD"],"published-print":{"date-parts":[[2021,12,7]]},"abstract":"<jats:p>Background: The Quick Dementia Rating System (QDRS) is a brief and rapid dementia staging tool that does not require a trained rater. Objective: The purpose of this study is to demonstrate the validity, reliability, and diagnostic usefulness of the Korean version of the QDRS (K-QDRS). Methods: We collected a total of 411 subject-informant dyads including cognitively unimpaired (CU, n\u200a=\u200a22), mild cognitive impairment (MCI, n\u200a=\u200a198), and dementia (n\u200a=\u200a191). The Clinical Dementia Rating (CDR) scale, Korean version of the Mini-Mental State Examination (K-MMSE), Korean version of instrumental activity of daily living (K-IADL), Short Form of the Geriatric Depression Scale, Caregiver-Administered Neuropsychiatric Inventory (CGA-NPI), and detailed neuropsychological tests were administered as gold standards of dementia staging, cognition, function, mood, and behavior. Results: Internal consistency of the K-QDRS was excellent with Cronbach\u2019s alpha of 0.933. Concurrent validity was also satisfactory, with the K-QDRS correlating highly with the CDR Sum of Boxes (Pearson\u2019s r\u200a=\u200a0.791), K-MMSE (Pearson\u2019s r\u200a=\u200a\u20130.518), K-IADL (Pearson\u2019s r\u200a=\u200a0.727), and CGA-NPI (Pearson\u2019s r\u200a=\u200a0.700). The K-QDRS was highly correlated with the global CDR, K-IADL, and CGA-NPI. We suggested two types of comparisons (for initial diagnosis and for follow-up evaluation). The cutoff scores for follow-up were 1.0 for MCI, 3.5 for very mild dementia, 6.5 for mild dementia, and 11.0 for moderate dementia. Conclusion: The K-QDRS is a valid and reliable dementia rating questionnaire and can be used, briefly and rapidly, in various settings like clinical practices, longitudinal cohort studies, and community primary care.<\/jats:p>","DOI":"10.3233\/jad-210584","type":"journal-article","created":{"date-parts":[[2021,10,29]],"date-time":"2021-10-29T11:42:59Z","timestamp":1635507779000},"page":"1645-1656","source":"Crossref","is-referenced-by-count":10,"title":["Validation of the Korean Quick Dementia Rating System (K-QDRS)"],"prefix":"10.1177","volume":"84","author":[{"given":"Hui Jin","family":"Ryu","sequence":"first","affiliation":[{"name":"Department of Neurology, Konkuk University Medical Center, Seoul, Republic of Korea"}],"role":[{"vocabulary":"crossref","role":"author"}]},{"given":"Yeonsil","family":"Moon","sequence":"additional","affiliation":[{"name":"Department of Neurology, Konkuk University Medical Center, Seoul, Republic of Korea"}],"role":[{"vocabulary":"crossref","role":"author"}]},{"given":"Minyoung","family":"Kim","sequence":"additional","affiliation":[{"name":"Department of Neurology, Konkuk University Medical Center, Seoul, Republic of Korea"}],"role":[{"vocabulary":"crossref","role":"author"}]},{"given":"Hee-Jin","family":"Kim","sequence":"additional","affiliation":[{"name":"Department of Neurology, College of Medicine, Hanyang University, Seoul, Republic of Korea"}],"role":[{"vocabulary":"crossref","role":"author"}]},{"given":"James E.","family":"Galvin","sequence":"additional","affiliation":[{"name":"Comprehensive Center for Brain Health, Department of Neurology, University of Miami Miller School of Medicine, Miami, FL, USA"}],"role":[{"vocabulary":"crossref","role":"author"}]},{"given":"Seol-Heui","family":"Han","sequence":"additional","affiliation":[{"name":"Department of Neurology, Konkuk University Medical Center, Seoul, Republic of Korea"}],"role":[{"vocabulary":"crossref","role":"author"}]}],"member":"179","reference":[{"key":"10.3233\/JAD-210584_ref1","doi-asserted-by":"crossref","first-page":"23","DOI":"10.1186\/s13195-016-0188-8","article-title":"Recent global trends in the prevalence and incidence of dementia, and survival with dementia","volume":"8","author":"Prince","year":"2016","journal-title":"Alzheimers Res Ther"},{"key":"10.3233\/JAD-210584_ref3","doi-asserted-by":"crossref","first-page":"1","DOI":"10.1037\/a0024643","article-title":"Guidelines for the evaluation of dementia and age-related cognitive change","volume":"67","author":"American Psychological A","year":"2012","journal-title":"Am Psychol"},{"key":"10.3233\/JAD-210584_ref4","doi-asserted-by":"crossref","first-page":"2412","DOI":"10.1212\/WNL.43.11.2412-a","article-title":"The Clinical Dementia Rating (CDR): Current version and scoring rules","volume":"43","author":"Morris","year":"1993","journal-title":"Neurology"},{"key":"10.3233\/JAD-210584_ref5","doi-asserted-by":"crossref","first-page":"2957","DOI":"10.1093\/brain\/awn234","article-title":"Development of methodology for conducting clinical trials in frontotemporal lobar degeneration","volume":"131","author":"Knopman","year":"2008","journal-title":"Brain"},{"key":"10.3233\/JAD-210584_ref6","doi-asserted-by":"crossref","first-page":"1136","DOI":"10.1176\/ajp.139.9.1136","article-title":"The Global Deterioration Scale for assessment of primary degenerative dementia","volume":"139","author":"Reisberg","year":"1982","journal-title":"Am J Psychiatry"},{"key":"10.3233\/JAD-210584_ref7","first-page":"612","article-title":"The validation of the Korean version of Global Deterioration Scale","volume":"20","author":"Choi","year":"2002","journal-title":"J Korean Neurol Assoc"},{"key":"10.3233\/JAD-210584_ref8","doi-asserted-by":"crossref","first-page":"189","DOI":"10.1016\/0022-3956(75)90026-6","article-title":"\u201cMini-mental state\u201d. 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