Abstract
Purpose
The global population is ageing. Evidence show dietary patterns may be associated with cognitive status in older adults. This cross-sectional study investigated associations between dietary patterns and cognitive function in older adults in New Zealand.
Methods
The REACH study (Researching Eating, Activity, and Cognitive Health) included 371 participants (65–74 years, 36% male) living independently in Auckland, New Zealand. Valid and reproducible dietary patterns were derived, using principal component analysis, from dietary data collected by a 109-item validated food frequency questionnaire. Six cognitive domains (global cognition, attention and vigilance, executive function, episodic memory, working memory, and spatial memory) were tested using COMPASS (Computerised Mental Performance Assessment System). Associations between dietary patterns and cognitive scores, adjusted for age, sex, education, physical activity, energy, and Apolipoprotein E-ε4 status were analysed using multiple linear regression analysis.
Results
Three dietary patterns explained 18% of dietary intake variation—‘Mediterranean style’ (comprising: salad vegetables, leafy cruciferous vegetables, other vegetables, avocados and olives, alliums, nuts and seeds, white fish and shellfish, oily fish, and berries); ‘Western’ (comprising: processed meats, sauces and condiments, cakes, biscuits and puddings, meat pies and chips, and processed fish); and ‘Prudent’ (comprising: dried legumes, soy-based foods, fresh and frozen legumes, whole grains, and carrots). No associations between any cognitive domain and dietary pattern scores were observed. Global cognitive function was associated with being younger and having a university education.
Conclusion
In this cohort of community-dwelling, older adults in New Zealand, current dietary patterns were not associated with cognitive function.
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Availability of data and material and code availability
Data described in the manuscript, code book, and analytic code will not be made available because study participants did not provide informed consent for this to occur.
Abbreviations
- APOE-ε4:
-
Apolipoprotein E-ε4
- COMPASS:
-
Computerised Mental Performance Assessment System
- FFQ:
-
Food frequency questionnaire
- KMO:
-
Kaiser–Meyer–Olkin
- MoCA:
-
Montreal Cognitive Assessment
- REACH:
-
Researching Eating, Activity, and Cognitive Health
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Acknowledgements
We thank the REACH participants and the REACH team, including Nicola Gillies, Harriet Guy, Anne Hiol and Angela Yu for assistance with data collection. Permission has been received from those named in these Acknowledgements.
Funding
Funding was provided by a Health Research Council of New Zealand Emerging Researcher Grant 17/566—Beck: optimising cognitive function: the role of dietary and lifestyle patterns. The funders have no role in the design of the study; collection, analysis, and interpretation of the data; writing manuscripts or publishing results. Lottery Health New Zealand funded Jamie de Seymour’s postdoctoral fellowship. Karen Mumme is funded by a Massey University Doctoral scholarship.
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The authors’ contributions were as follows: KLB, CAC, PRvH, BJ, CFH-R, WS, A-LMH, and JC designed the research; CSG advised on medication use and APOE-ε4 analysis; KLB, CAC, PRvH, KDM, CS, and OM conducted the research; KDM, KLB, JdS, and BJ analysed the data or performed statistical analysis; KDM wrote the paper; KLB, CAC, PRvH, and KDM had primary responsibility for final content. All the authors read and approved the final manuscript.
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Massey University Human Ethics Committee granted ethical approval: Southern A, Application 17/69.
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Mumme, K.D., Conlon, C.A., von Hurst, P.R. et al. Dietary patterns and cognitive function in older New Zealand adults: the REACH study. Eur J Nutr 61, 1943–1956 (2022). https://doi.org/10.1007/s00394-021-02775-x
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DOI: https://doi.org/10.1007/s00394-021-02775-x