title: Prevalence and trends of dementia in Korea: a systematic review and meta-analysis.
abstract: Through a systematic review and meta-analysis of epidemiological studies on dementia, we assessed the prevalence of dementia and its subtypes-Alzheimer' disease (AD) and vascular dementia (VaD)-in Korea. We searched for epidemiological studies on dementia published in 1990-2013 using PubMed, Scopus, EMBASE, KoreaMed, KISS, and RiCH. Dementia prevalence in elderly patients (aged≥65 yr) was 9.2% (95% confidence interval [CI], 8.2%-10.4%) from 11 studies, which was higher than those from Western and other Asian countries. AD was the most prevalent dementia type, with a prevalence of 5.7% (95% CI, 5.0%-6.4%) from 10 studies compared with 2.1% (95% CI, 1.6%-2.7%) for VaD from 9 studies. The age-specific prevalence of dementia approximately doubled with each 5.8-yr increase of age. Although a significant increasing trend of dementia prevalence was not observed, it increased slightly from 7.3% to 8.7% after 2005; AD prevalence increased after 1995 and VaD prevalence decreased after the early 2000s. The AD/VaD ratio increased from 1.96 in the early 1990s to 4.13 in the 2010s, similar to the worldwide ratio. Owing to this high prevalence in the aging population, dementia will impose significant economic burdens to Korean society.
authors.affiliation: National Institute of Dementia, Seongnam, Korea.
authors.forename: You Joung
authors.identifier: 0000-0002-1103-3858
authors.initials: YJ
authors.lastname: Kim
authors.affiliation: Department of Neuropsychiatry, Seoul National University Bundang Hospital, Seongnam, Korea.
authors.forename: Ji Won
authors.initials: JW
authors.lastname: Han
authors.affiliation: Department of Neuropsychiatry, Seoul National University Bundang Hospital, Seongnam, Korea.
authors.forename: Yoon Seop
authors.initials: YS
authors.lastname: So
authors.affiliation: Department of Neuropsychiatry, Seoul National University Bundang Hospital, Seongnam, Korea.
authors.forename: Ji Young
authors.initials: JY
authors.lastname: Seo
authors.affiliation: Department of Neuropsychiatry, Seoul National University Bundang Hospital, Seongnam, Korea.
authors.forename: Ka Young
authors.initials: KY
authors.lastname: Kim
authors.affiliation: National Institute of Dementia, Seongnam, Korea. ; Department of Neuropsychiatry, Seoul National University Bundang Hospital, Seongnam, Korea. ; Department of Psychiatry, Seoul National University College of Medicine, Seoul, Korea. ; Department of Brain and Cognitive Science, Seoul National University College of Natural Sciences, Seoul, Korea.
authors.forename: Ki Woong
authors.initials: KW
authors.lastname: Kim
mesh_terms: D000367:Age Factors; D000544:Alzheimer Disease / Q000453:epidemiology; D044466:Asian People; D016208:Databases, Factual; D003704:Dementia / Q000453:epidemiology*; D015140:Dementia, Vascular / Q000453:epidemiology; D006801:Humans; D015995:Prevalence; D011785:Quality Assurance, Health Care; D056910:Republic of Korea
keywords: Dementia; Korea; Meta-Analysis; Prevalence; Trends