Dietary quality may enhance survival related to cognitive impairment in Taiwanese elderly

  • Rosalind Chia-Yu Chen Division of Health Services and Preventive Medicine, Institute of Population Health Sciences, National Health Research Institutes
  • Yu-Hung Chang Division of Health Policy and Translation, Institute of Population Health Sciences, National Health Research Institutes
  • Meei-Shyuan Lee School of Public Health, National Defense Medical Center
  • Mark L. Wahlqvist Division of Health Services and Preventive Medicine, Institute of Population Health Sciences, National Health Research Institutes
Keywords: dietary diversity, cognition, mortality, elderly, fruit

Abstract

Background: Impaired cognition increases mortality in the aged. It is unclear how dietary quality might affect this relationship. Objective: To examine how dietary diversity and cognition might interact to determine survival. Design: In a Nutrition and Health Survey in Taiwan (NAHSIT 1999-2000), 1,839 representative elderly were followed for mortality up to 10 years. The dietary quality measure was a dietary diversity score (DDS, range: 0-6) to present six food groups (dairy, meat, rice and grains, fruit, vegetable,fat and oil) derived from a 24-h dietary recall. Cognitive function was evaluated by the validated Short Portable Mental Status Questionnaire (SPMSQ). Results: Those with cognitive impairment (SPMSQ≥3 errors) had 2.56 (95% confidence intervals (CI), 1.99- 3.28) times the all-cause-mortality risk of those with intact cognition. After control for potential confounders, the adjusted hazard ratio (HR) remained significant (1.46, 95% CI: 1.06-2.02). Significant interactions for DDS and cognition were found (p <0.001). Jointly, compared to normal-SPMSQ-highest DDS, the greatest HR is where impaired cognition is combined with the lowest DDS (HR 2.24, 95% CI: 1.19-4.24). Increased DDS was associated with improvement in survival that is especially evident in those with 1-2 errors where the greatest HR reduction was found, and for fruit. Attributability for mortality amounted to 18% for impaired cognition and 33% for least diverse diet. Conclusions: Dietary diversity may improve survival in relation to impaired cognitive function.

Keywords: dietary diversity; cognition; mortality; elderly; fruit

(Published: 30 October 2011)

Citation: Food & Nutrition Research 2011, 55: 7387 - DOI: 10.3402/fnr.v55i0.7387

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Published
2011-10-30
How to Cite
Chen, R. C.-Y., Chang, Y.-H., Lee, M.-S., & Wahlqvist, M. L. (2011). Dietary quality may enhance survival related to cognitive impairment in Taiwanese elderly. Food & Nutrition Research. Retrieved from https://foodandnutritionresearch.net/index.php/fnr/article/view/577
Section
Original Articles

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