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The Relationship between Socioeconomic Vulnerability and Cognitive Impairment among Aged People in Korea
Korean J Clin Geri 2017 Dec;18(2):74-81
Published online December 29, 2017;  https://doi.org/10.15656/kjcg.2017.18.2.74
Copyright © 2017 The Korean Academy of Clinical Geriatrics.

SangKyun Park1, YoungSi Hwang1, ByungTaek Oh1, JunYoung Lee1, SeungWan Hong1, SungHi Kim2, DaeHyun Kim1

1Department of Family Medicine, Keimyung University College of Medicine, 2Department of Family Medicine, Catholic University of Daegu, School of Medicine, Daegu, Korea
Received May 24, 2017; Revised August 14, 2017; Accepted August 22, 2017.
This is an Open Access article distributed under the terms of the Creative Commons Attribution Non-Commercial License (http://creativecommons.org/licenses/by-nc/4.0) which permits unrestricted non-commercial use, distribution, and reproduction in any medium, provided the original work is properly cited.
 Abstract
Background: The relationship between socioeconomic status and cognitive dysfunction is still unknown. The aim of this study is to determine the relationship between cognitive impairment and socioeconomic vulnerability on elderly people in Korea by Korean Longitudinal Study on Aging (KLoSA).
Methods: Authors collected data from Korean Longitudinal Study on Aging (KLoSA). Cognitive function was assessed by the Korean version of the mini-mental state examination-Korea (MMSE-K). And, the authors created the socioeconomic vulnerability (SEV) score, consisted of 6 items. Those 6 items are education level, house income, social engagement score, self-related economic satisfaction percentage, private insurance and residence.
Results: A total of 4,044 participants were included and 2,045 subjects were classified as cognitive impaired whose MMSE is lower than 23. SEV score was significantly different between normal and cognitive impairment group. Authors divided four SEV groups by SEV severity. Increased SEV score was significantly correlated with cognitive impairment group (Odds ratio SEV Q2: 2.84, Q3: 5.69 and Q4:10.67). In addition, diabetes mellitus (1.29, 1.06∼1.61), depression (1.23, 1.04∼1.46), function (ADL: 2.48, 1.61∼3.82, IADL: 1.95, 1.54∼2.47) also correlated with cognitive impairment.
Conclusion: Socioeconomic vulnerability was strongly correlated with cognitive impairment. Depression, diabetes and independent functionality (ADL, IADL) were also significant correlated with cognitive impairment.
Keywords : Cognitive impairment, Socioeconomic vulnerability, Korean Longitudinal Study on Aging (KLoSA)
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December 2017, 18 (2)