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  • Title: Prospective study of Dietary Approaches to Stop Hypertension- and Mediterranean-style dietary patterns and age-related cognitive change: the Cache County Study on Memory, Health and Aging.
    Author: Wengreen H, Munger RG, Cutler A, Quach A, Bowles A, Corcoran C, Tschanz JT, Norton MC, Welsh-Bohmer KA.
    Journal: Am J Clin Nutr; 2013 Nov; 98(5):1263-71. PubMed ID: 24047922.
    Abstract:
    BACKGROUND: Healthy dietary patterns may protect against age-related cognitive decline, but results of studies have been inconsistent. OBJECTIVE: We examined associations between Dietary Approaches to Stop Hypertension (DASH)- and Mediterranean-style dietary patterns and age-related cognitive change in a prospective, population-based study. DESIGN: Participants included 3831 men and women ≥65 y of age who were residents of Cache County, UT, in 1995. Cognitive function was assessed by using the Modified Mini-Mental State Examination (3MS) ≤4 times over 11 y. Diet-adherence scores were computed by summing across the energy-adjusted rank-order of individual food and nutrient components and categorizing participants into quintiles of the distribution of the diet accordance score. Mixed-effects repeated-measures models were used to examine 3MS scores over time across increasing quintiles of dietary accordance scores and individual food components that comprised each score. RESULTS: The range of rank-order DASH and Mediterranean diet scores was 1661-25,596 and 2407-26,947, respectively. Higher DASH and Mediterranean diet scores were associated with higher average 3MS scores. People in quintile 5 of DASH averaged 0.97 points higher than those in quintile 1 (P = 0.001). The corresponding difference for Mediterranean quintiles was 0.94 (P = 0.001). These differences were consistent over 11 y. Higher intakes of whole grains and nuts and legumes were also associated with higher average 3MS scores [mean quintile 5 compared with 1 differences: 1.19 (P < 0.001), 1.22 (P < 0.001), respectively]. CONCLUSIONS: Higher levels of accordance with both the DASH and Mediterranean dietary patterns were associated with consistently higher levels of cognitive function in elderly men and women over an 11-y period. Whole grains and nuts and legumes were positively associated with higher cognitive functions and may be core neuroprotective foods common to various healthy plant-centered diets around the globe.
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