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Dietary diversity and cognitive function among elderly people: A population-based study
Stockholm University, Faculty of Social Sciences, Aging Research Center (ARC), (together with KI).
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Number of Authors: 82017 (English)In: The Journal of Nutrition, Health & Aging, ISSN 1279-7707, E-ISSN 1760-4788, Vol. 21, no 10, p. 1089-1094Article in journal (Refereed) Published
Abstract [en]

To explore associations of dietary diversity with cognitive function among Chinese elderly. This cross-sectional study was conducted in 2011-2012, data were analyzed using multiple linear regression and logistic regression models. community-based setting in the 23 provinces in China. 8,571 elderly participants, including 2984 younger elderly aged 65-79 and 5587 oldest old aged 80+ participated in this study. Intake frequencies of food groups was collected and dietary diversity (DD) was assessed based on the mean of DD score. Cognitive function was assessed using the Chinese version of Mini-Mental State Examination (MMSE), and cognitive impairment was defined using education-based cutoffs. Information about socio-demographics, lifestyles, resilience and health status was also collected. Poor dietary diversity was significantly associated with cognitive function, with beta (95% CI) of -0.11(-0.14, -0.08) for - log (31-MMSE score) and odds ratio (95% CI) of 1.29 (1.14, 1.47) for cognitive impairment. Interaction effect of age with DD was observed on cognitive impairment (P interaction=0.018), but not on-log (31-MMSE score) (P interaction=0.08). Further separate analysis showed that poor DD was significantly associated with increased risk of cognitive impairment in the oldest old (p < 0.01), with odds ratio (95% CI) of 1.34 (1.17, 1.54), while not in the younger elderly (p > 0.05), with OR (95% CI) being 1.09 (0.80, 1.47) in the fully adjusted model. Similar results were obtained when DD was categorized into four groups. Poor dietary diversity was associated with worse global cognitive function among Chinese elderly, and particularly for the oldest old. This finding would be very meaningful for prevention of cognitive impairment.

Place, publisher, year, edition, pages
2017. Vol. 21, no 10, p. 1089-1094
Keywords [en]
Dietary diversity, cognitive function, elderly, oldest old
National Category
Geriatrics Gerontology, specialising in Medical and Health Sciences Nutrition and Dietetics
Identifiers
URN: urn:nbn:se:su:diva-151153DOI: 10.1007/s12603-017-0912-5ISI: 000417740900004PubMedID: 29188865OAI: oai:DiVA.org:su-151153DiVA, id: diva2:1174591
Available from: 2018-01-16 Created: 2018-01-16 Last updated: 2018-01-16Bibliographically approved

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The Journal of Nutrition, Health & Aging
GeriatricsGerontology, specialising in Medical and Health SciencesNutrition and Dietetics

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