Table of Contents Author Guidelines Submit a Manuscript
BioMed Research International
Volume 2017, Article ID 1903589, 9 pages
https://doi.org/10.1155/2017/1903589
Research Article

Socioeconomic Status, Frailty, and All-Cause Mortality in Korean Older Adults: A 3-Year Population-Based Prospective Study

College of Sport Science, Sungkyunkwan University, Suwon, Republic of Korea

Correspondence should be addressed to Hyunsik Kang; ude.ukks@gnakh

Received 23 August 2017; Revised 1 November 2017; Accepted 20 November 2017; Published 14 December 2017

Academic Editor: Hynek Pikhart

Copyright © 2017 Jinkyung Cho et al. This is an open access article distributed under the Creative Commons Attribution License, which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited.

Abstract

Background. Little is known regarding the effects of socioeconomic status (SES) and frailty on mortality in Korea. Objective. This study investigated the combined impact of low SES and frailty on all-cause mortality in Korean older adults. Methods. Study sample at baseline comprised 7,960 community-dwelling adults (56.8% women) aged 65 years and older. The Cox proportional hazards model was used to estimate the hazard ratio (HR) and 95% confidence interval (CI) of low SES and frailty for all-cause mortality. Results. Overall, low SES plus frailty resulted in an increased risk of all-cause mortality (HR = 1.56, 95% CI = 1.09–2.23, ) even after adjustments for all the measured covariates, as compared with high SES plus nonfrailty (HR = 1). Among older adults aged 65–75 years, the increased mortality risk of either low SES plus nonfrailty (HR = 1.37, 95% CI = 1.02–1.84, ) or high SES plus frailty (HR = 2.09, 95% CI = 1.12–3.91, ) remained significant even after adjustments for all the covariates, as compared with high SES plus nonfrailty (HR = 1). Conclusion. The current findings suggest that either low SES or frailty is significantly associated with increased all-cause mortality in Korean older adults.