Diverse Diets Linked to Sharper Minds in the Elderly
In recent research, scientists have shed light on the significant role dietary diversity plays in maintaining cognitive health among the elderly. This study, conducted with older Japanese adults, delves into how varied diets influence the risk of cognitive impairments, including mild cognitive impairment (MCI) and global cognitive impairment (GCI). The findings suggest that a diet incorporating a wide range of food groups could be key in preserving mental sharpness.
The research method involved assessing the dietary habits of participants and correlating them with cognitive performance, measured through established neurocognitive tests. The variety in diet was quantified using a diet variety score, which considered the frequency of consumption of different food groups. The results were striking, revealing a lower prevalence of MCI and GCI among those with higher dietary diversity.
The implications of this study are profound, indicating that dietary choices play a critical role in cognitive health as we age. It's a call to action for individuals and healthcare providers to consider diet as a vital component of mental well-being in older adults. The research underscores the importance of a balanced diet, rich in variety, as a potential strategy to combat cognitive decline.
Article Information
Association between dietary diversity and cognitive impairment in community-dwelling older adults
Published in Geriatr Gerontol Int. Yuto Kiuchi et al.
Abstract
Aim: The present study aimed to examine whether dietary diversity is associated with cognitive impairment, including mild cognitive impairment (MCI), in community-dwelling older Japanese adults.
Methods: This cross-sectional study was carried out in a general community setting. MCI and global cognitive impairment (GCI) were assessed using the Mini-Mental State Examination and National Center for Geriatrics and Gerontology-Functional Assessment Tool, which are multicomponent neurocognitive tests that include memory attention, executive function and processing speed. Dietary diversity was assessed using the diet variety score. The diet variety score assessed the 1-week consumption frequency of 10 food groups, and either 0 or 1 point was allocated to each category based on the following responses: (i) "eat almost every day" (1 point); and (ii) "not eaten almost daily" (0 points). Older adults with a diet variety score of ≥3 points were defined as having high dietary diversity.
Results: Data included 8987 older adults (mean age 73.9 ± 5.5 years; men 44.3%). The overall prevalences of MCI and GCI were 17.1% (n = 1538) and 8.4% (n = 753), respectively. The proportion of patients with a high dietary diversity was 69.9% (n = 6286). Multinomial logistic regression analysis revealed high dietary diversity was associated with MCI (OR 0.83, 95% CI 0.73-0.94) and GCI (OR 0.77, 95% CI 0.65-0.92) after adjusting for covariates.
Conclusions: This study had a large sample size of older Japanese adults, and showed that high dietary diversity was associated with a lower proportion of MCI and GCI among older adults. Geriatr Gerontol Int 2023; ••: ••-••.
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