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A 9-Year Comparison of Dementia Prevalence in Korea: Results of NaSDEK 2008 and 2017

Authors
Suh, Seung WanKim, You JoungKwak, Kyung PhilKim, KiwonKim, Moon-DooKim, Byung-SooKim, Bong JoKim, Shin GyeomKim, Jeong LanKim, Tae HuiMoon, Seok WooPark, Kyung WonPark, Jong-IlPark, Joon HyukBae, Jae NamSeo, JiyeongSeong, Su JeongSon, Sang JoonShin, Il-SeonRyu, Seung-HoLee, Kang JoonLee, Nam-JinLee, Dong YoungLee, Dong WooLee, Seok BumLee, Chang UkChang, Sung ManJeong, Hyun-GhangCho, Maeng JeCho, Seong-JinJhoo, Jin HyeongChoe, Young MinHan, Ji WonKim, Ki Woong
Issue Date
2021
Publisher
IOS PRESS
Keywords
Alzheimer' s disease; dementia; mild cognitive impairment; prevalence; vascular dementia
Citation
JOURNAL OF ALZHEIMERS DISEASE, v.81, no.2, pp.821 - 831
Indexed
SCIE
SCOPUS
Journal Title
JOURNAL OF ALZHEIMERS DISEASE
Volume
81
Number
2
Start Page
821
End Page
831
URI
https://scholar.korea.ac.kr/handle/2021.sw.korea/137916
DOI
10.3233/JAD-201588
ISSN
1387-2877
Abstract
Background: In many high-income Western countries, the prevalence of dementia had been reduced over the past decades. Objective: We investigated whether the prevalence of all-cause dementia, Alzheimer's disease, vascular dementia, and mild cognitive impairment (MCI) had changed in Korea from 2008 to 2017. Methods: Nationwide Survey on Dementia Epidemiology of Korea (NaSDEK) in 2008 and 2017 was conducted on representative elderly populations that were randomly sampled across South Korea. Both surveys employed a two-stage design (screening and diagnostic phases) and diagnosed dementia and MCI according to the fourth edition of the Diagnostic and Statistical Manual of Mental Disorders and the consensus criteria from the International Working Group, respectively. The numbers of participants aged 65 years or older in the screening and diagnostic phases were 6,141 and 1,673 in the NaSDEK 2008 and 2,972 and 474 in the NaSDEK 2017, respectively. Results: The age- and sex-standardized prevalence of all-cause dementia and Alzheimer's disease showed nonsignificant decrease (12.3% to 9.8%, odds ratio [OR] = 0.89, 95% confidence interval [CI] = 0.54-1.48 for all-cause dementia; 7.6% to 6.8%, OR [95% CI] = 0.91 [0.58-1.42] for Alzheimer's disease). Vascular dementia decreased in the young-old population aged less than 75 years (2.7% to 0.001%, OR [95% CI] = 0.04 [0.01-0.15]) and in women (1.9% to 0.5%, OR [95% CI] = 0.27 [0.10-0.72]) while MCI remained stable (25.3% to 26.2%, OR [95% CI] = 1.08 [0.67-1.73]). Conclusion: We found that the prevalence of dementia in Korea showed a nonsignificant decrease between 2008 and 2017.
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