Association of metabolic syndrome and 25-hydroxyvitamin D with cognitive impairment among elderly Koreans

Eun Young Lee, Su Jin Lee, Kyoung Min Kim, Young Mi Yun, Bo Mi Song, Jong Eun Kim, Hyeon Chang Kim, Yumie Rhee, Yoosik Youm, Chang Oh Kim

Research output: Contribution to journalArticle

5 Citations (Scopus)

Abstract

Aim: Metabolic syndrome and vitamin D deficiency are prevalent in older adults, and are considered risk factors for cognitive impairment. We investigated the combined effects of MetS and serum 25-hydroxyvitamin D (25[OH]D) levels on cognitive function in older adults. Methods: We studied 2940 participants aged ≥65 years from the Korean Urban Rural Elderly cohort study. Metabolic syndrome was defined according to the updated Adult Treatment Panel III criteria. Serum 25(OH)D levels were categorized into four groups: <25, 25–49, 50–74 and ≥75 nmol/L. Cognitive function was assessed using the Mini-Mental State Examination. Results: Participants with cognitive impairment had higher metabolic syndrome prevalence and lower serum 25(OH)D levels than those without cognitive impairment. In univariate analysis, both metabolic syndrome and low 25(OH)D levels were associated with cognitive impairment. These associations remained unchanged after adjusting for potential confounders including age, sex, season and education. In addition, participants with metabolic syndrome and low 25(OH)D had significantly increased odds for cognitive impairment (odds ratio 3.06, 95% CI 1.61–5.80) when compared with those with no metabolic syndrome and high 25(OH)D. Conclusions: Metabolic syndrome was associated with cognitive impairment, and this risk was synergistically increased when metabolic syndrome was combined with low 25(OH)D. A focus on individuals with metabolic syndrome and low 25(OH)D might be helpful to identify older adults who are at risk of cognitive impairment. Geriatr Gerontol Int 2017; 17: 1069–1075.

Original languageEnglish
Pages (from-to)1069-1075
Number of pages7
JournalGeriatrics and Gerontology International
Volume17
Issue number7
DOIs
Publication statusPublished - 2017 Jul

All Science Journal Classification (ASJC) codes

  • Health(social science)
  • Gerontology
  • Geriatrics and Gerontology

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