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Dietary Diversity and Cognitive Function among Elderly People: A Population-Based Study.

Z Yin1, Z Fei, C Qiu

  • 1Dr. Wenhua Zhao, Xiaoming Shi and Yi Zeng are co-corresponding authors. Please send email to Dr. Wenhua Zhao, 27 Nanwei Road, Xi Cheng District, Beijing 100050, China. Tel.: 86-10-66237006, zhaowh@chinacdc.cn.

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Poor dietary diversity is linked to worse cognitive function in Chinese elderly, especially those aged 80 and above. This highlights the importance of nutrition for preventing cognitive decline.

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Dietary diversitycognitive functionelderlyoldest old

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Area of Science:

  • Gerontology
  • Nutritional Science
  • Cognitive Health

Background:

  • Cognitive impairment is a growing concern among the elderly population worldwide.
  • Dietary diversity (DD) is a potential modifiable factor influencing cognitive function.
  • Understanding the relationship between DD and cognition in diverse populations is crucial for public health.

Purpose of the Study:

  • To investigate the association between dietary diversity and cognitive function in a large cohort of Chinese elderly.
  • To examine if this association differs between younger elderly (65-79) and the oldest old (80+).

Main Methods:

  • A cross-sectional study involving 8,571 Chinese elderly participants (aged 65+) across 23 provinces.
  • Dietary diversity assessed using food group intake frequencies and a DD score.
  • Cognitive function evaluated using the Chinese version of the Mini-Mental State Examination (MMSE).
  • Statistical analyses included multiple linear and logistic regression models.

Main Results:

  • Poor dietary diversity was significantly associated with worse global cognitive function (lower MMSE scores).
  • Poor dietary diversity was also significantly associated with a higher odds of cognitive impairment.
  • This association was particularly pronounced in the oldest old (80+), with a significant interaction effect of age and DD on cognitive impairment.

Conclusions:

  • Poor dietary diversity is a significant risk factor for cognitive impairment and poorer cognitive function among Chinese elderly.
  • The findings underscore the importance of promoting dietary diversity for cognitive health, especially in the oldest segments of the elderly population.
  • This research provides valuable insights for developing targeted nutritional interventions to prevent cognitive decline in aging populations.