Evidence map›Paper›PMID 33835746›Full record

ArticleJournal of clinical neurology (Seoul, Korea)2021

Prevalence and Incidence of Dementia in South Korea: A Nationwide Analysis of the National Health Insurance Service Senior Cohort.

Jae Won Jang, Jeong Hoon Park, Seongheon Kim, Seung Hwan Lee, Suk Hee Lee, Young Ju Kim

Abstract read
In one paragraph

Article in Journal of clinical neurology (Seoul, Korea), 2021. The graph could read no effect estimate from its abstract, so it casts no vote on the map. Cited by 43 papers, 1 of them a synthesis that pooled it.

0numbers the graph read from it
0cells of the map it votes in
43citing papers in PubMed, 1 pooled it
–field-weighted citation impact
1 · What the graph read from it

What it found

Each row is one number read from the abstract, on the scale the paper reported it, with its interval. Left of the dashed line favours the treatment, right favours the comparator. Under each row is the sentence it came from. New to these charts? A ten-minute tutorial.

The abstract states no effect estimate the extractor could read, or names no intervention and outcome on the map, so this paper lights no cell and moves no belief. It is still indexed, cited and linked below.

2 · The registry

The trial behind it

Trials whose registry record cites this paper, or whose number appears in the abstract. A trial that started after this paper was published is citing it as background, not reporting it.

Neither the registry nor the abstract names a trial number. If this is a trial report, that itself is worth knowing.

3 · Its place in the literature

Who cites it

43 citing papers in PubMed, 1 synthesis or guideline pooled it.

  1. Pooled it
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  11. Modernizing diagnosis of Alzheimer's disease: A review of global trends and Asia-specific perspectives.Alzheimer's & dementia : the journal of the Alzheimer's Association · 2025
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4 · The record

Corrections and comments

PubMed lists nothing against this paper. Absence here is not a guarantee, only a check that was made.

5 · Who and what money

Authors and funding

6 authors.

Jae Won JangDepartment of Neurology, Kangwon National University Hospital, Kangwon National University College of Medicine, Chuncheon, Korea.ORCID https://orcid.org/0000-0003-3540-530X
Jeong Hoon ParkDepartment of Neurology, Kangwon National University Hospital, Kangwon National University College of Medicine, Chuncheon, Korea.ORCID https://orcid.org/0000-0002-1020-116X
Seongheon KimDepartment of Neurology, Kangwon National University Hospital, Kangwon National University College of Medicine, Chuncheon, Korea.ORCID https://orcid.org/0000-0002-4253-7522
Seung Hwan LeeDepartment of Neurology, Kangwon National University Hospital, Kangwon National University College of Medicine, Chuncheon, Korea.ORCID https://orcid.org/0000-0002-9500-6178
Suk Hee LeeDepartment of Statistics, Kangwon National University, Chuncheon, Korea.ORCID https://orcid.org/0000-0002-1555-4538
Young Ju KimDepartment of Statistics, Kangwon National University, Chuncheon, Korea. ykim7stat@kangwon.ac.kr.ORCID http://orcid.org/0000-0001-5876-8803

Funding

Kangwon National University Hospital
6 · The paper itself

Abstract

background and purposeDementia is rapidly becoming more common in the elderly population of South Korea, and there are regional difference in its demographics. This study investigated the trajectories in the prevalence and incidence of dementia based on the Seoul metropolitan area and other areas in South Korea using big data from the National Health Insurance Service (NHIS).

methodsWe examined a population-based elderly cohort obtained from the NHIS Senior Cohort (NHIS-SC) data set that comprises approximately half a million recipients of medical insurance in South Korea during 2003-2015. The age-standardized prevalence and incidence of dementia as well as their trajectories from 2003 were estimated. Regional differences in these rates between Seoul metropolitan area and other areas were also analyzed.

resultsThe standardized prevalence of dementia per 100,000 increased significantly from 178.11 in 2003 to 5,319.01 in 2015 (

conclusionsThis study has shown that the standardized prevalence and incidence of dementia increased steadily from 2003 to 2015 in South Korea based on the NHIS-SC data set, and differed between Seoul metropolitan area and other areas.

Indexed as

dementiaincidenceprevalence

Identifiers

PMID33835746
PMCPMC8053535

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Registered trials

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Read under generation 80e0d062 · epoch 390. Bibliography from PubMed, PubMed Central and OpenAlex; grants from NIH RePORTER; trial links from ClinicalTrials.gov; estimates, votes and beliefs from the OpenQuestion graph.