Diet and cognitive function in later life

a challenge for nutrition epidemiology

Geraldine McNeill, John Winter, Xueli Jia

Research output: Contribution to journalArticle

30 Citations (Scopus)

Abstract

Background: As the proportion of old and very old people in the population increases, new research on the influence of diet on health and nutritional needs in later life will be needed. Dietary assessment methods that rely on short-term memory or lengthy interviews, such as the 24-h recall and diet history methods, could have some limitations in this age group. There is some support for the use of food frequency questionnaires (FFQs) in older people, although their validity in the older old and in those with more advanced cognitive decline has not been extensively assessed.

Subjects/methods: In a study designed to assess the validity of a modified FFQ in men and women over 65 years, 50 men and 47 women completed two FFQs, and 42 men and 41 women completed one FFQ followed by a 4-day weighed diet diary. Digit span forward (a test of short-term memory) and verbal fluency (a test of executive function) tests were used to assess the possible influence of cognitive function on repeatability and validity of the FFQ.

Results: The FFQ was found to have good repeatability for most nutrients and reasonable validity for some but not all nutrients. Cognitive function assessed prior to the dietary assessment showed no relationship with repeatability, but there was some evidence that validity was lower in those with lower executive function.

Conclusions: Dietary assessment in healthy older people without overt cognitive decline can be achieved, but development and testing of methods of data collection for each target population and nutrient of interest are particularly important in this age group to ensure valid results. The possibility that cognitive decline influences dietary assessment needs to be borne in mind in the interpretation of observational studies of the influence of dietary intake on cognition in later life.
Original languageEnglish
Pages (from-to)S33-S37
Number of pages5
JournalEuropean Journal of Clinical Nutrition
Volume63
Issue numberS1
DOIs
Publication statusPublished - Feb 2009

Fingerprint

Cognition
Epidemiology
Diet
Food
Executive Function
Short-Term Memory
Age Groups
Needs Assessment
Health Services Needs and Demand
Observational Studies
Surveys and Questionnaires
Interviews
Health
Research
Population
Cognitive Dysfunction

Keywords

  • diet
  • dietary assessment
  • cognitive function
  • old age

Cite this

Diet and cognitive function in later life : a challenge for nutrition epidemiology. / McNeill, Geraldine; Winter, John; Jia, Xueli.

In: European Journal of Clinical Nutrition, Vol. 63, No. S1, 02.2009, p. S33-S37.

Research output: Contribution to journalArticle

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