Toggle Main Menu Toggle Search

Open Access padlockePrints

Prevalence of dementia in East Asia: A synthetic review of time trends

Lookup NU author(s): Dr Yu-Tzu WuORCiD, Professor Carol Brayne, Professor Fiona MatthewsORCiD



This work is licensed under a Creative Commons Attribution 4.0 International License (CC BY 4.0).


© 2015 The Authors. International Journal of Geriatric Psychiatry published by John Wiley & Sons Ltd. © 2015 The Authors. International Journal of Geriatric Psychiatry published by John Wiley & Sons Ltd.Objective This study aims to synthesise evidence on time trends of dementia prevalence in East Asian countries including Japan, China, South Korea and Taiwan and assess the impact of the societal changes on future prevalence. Method Relevant reviews and recent nationwide studies in East Asia were identified to investigate changes in prevalence of dementia over time taking into account the potential impact of methodological factors and study designs. Results The robust evidence that has been interpreted to suggest a substantial increasing trend over time is less compelling once fundamental differences in study methods and populations across individual surveys are considered. In Japan, longitudinal studies in small areas suggest the potential increase of prevalence after 2000. Increasing trends in China, South Korea and Taiwan over the last 20-30 years are based on the literature review without adjustment for methodological differences. Economic development and huge societal changes alongside the rise of non-communicable disease in East Asia could lead to increasing prevalence of dementia in the future once those cohorts with high risk of dementia reached their older age. Conclusion Current evidence is not sufficient to suggest increasing trends of dementia prevalence in East Asia. Longitudinal studies with representative samples and stable methodology are needed to provide fundamental information of the epidemiology of dementia and identify important risk factors in East Asian societies.

Publication metadata

Author(s): Wu Y-T, Brayne C, Matthews FE

Publication type: Review

Publication status: Published

Journal: International Journal of Geriatric Psychiatry

Year: 2015

Volume: 30

Issue: 8

Pages: 793-801

Print publication date: 01/08/2015

Online publication date: 11/05/2015

Acceptance date: 15/04/2015

ISSN (print): 0885-6230

ISSN (electronic): 1099-1166

Publisher: John Wiley and Sons Ltd


DOI: 10.1002/gps.4297

PubMed id: 25963138