Dataset Information

Unhealthy foods may attenuate the beneficial relation of a Mediterranean diet to cognitive decline.

ABSTRACT:

Introduction

It is unclear whether eating Western diet food components offsets the Mediterranean diet's (MedDiet) potential benefits on cognitive decline.

Methods

The study includes 5001 Chicago Health and Aging Project participants (63% African American, 36% males, 74 ± 6.0 years old), with food frequency questionnaires and ≥ two cognitive assessments over 6.3 ± 2.8 years of follow-up. Mixed-effects models were adjusted for age, sex, education, race, cognitive activities, physical activity, and total calories.

Results

Stratified analysis showed a significant effect of higher MedDiet on cognitive decline only with a low Western diet score (highest vs lowest MedDiet tertile: β = 0.020, P = .002; p trend = 0.002) and not with a high Western diet score (highest vs lowest MedDiet tertile: β = 0.010, P = .11; p trend = 0.09).

Conclusion

This prospective study found that high consumption of Western diet components attenuates benefits of the MedDiet on cognition.

SUBMITTER: Agarwal P

PROVIDER: S-EPMC9764420 | biostudies-literature | 2021 Jul

REPOSITORIES: biostudies-literature

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Publications

Unhealthy foods may attenuate the beneficial relation of a Mediterranean diet to cognitive decline.

Agarwal Puja P Dhana Klodian K Barnes Lisa L LL Holland Thomas M TM Zhang Yanyu Y Evans Denis A DA Morris Martha Clare MC

Alzheimer's & dementia : the journal of the Alzheimer's Association 20210107 7

<h4>Introduction</h4>It is unclear whether eating Western diet food components offsets the Mediterranean diet's (MedDiet) potential benefits on cognitive decline.<h4>Methods</h4>The study includes 5001 Chicago Health and Aging Project participants (63% African American, 36% males, 74 ± 6.0 years old), with food frequency questionnaires and ≥ two cognitive assessments over 6.3 ± 2.8 years of follow-up. Mixed-effects models were adjusted for age, sex, education, race, cognitive activities, physica ...[more]

PMID: 33410584

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Project description:BackgroundEvidence regarding the role of diet quality, especially its change, in subjective cognitive decline (SCD) is scarce.ObjectivesWe aimed to examine associations of long-term diet quality scores, including the Alternate Mediterranean Diet (AMED), Dietary Approaches to Stop Hypertension (DASH), and Alternate Healthy Eating Index 2010 (AHEI-2010), with SCD in the Nurses' Health Study.MethodsWe followed 49,493 female registered nurses (mean age in 1984: 48 y) from 1984 to 2014. Diet scores were derived from 7 repeated FFQs in 1984, 1986, and every 4 y afterward until 2006. Self-reported SCD was assessed in 2012 and 2014 by a 7-item questionnaire on memory and cognition changes. Categorical SCD score was classified as "none" (0 points, 40.8%), "moderate" (0.5-2.5 points, 46.9%), and "severe" (3-7 points, 12.3%).ResultsMultinomial and linear regression models were adjusted for total calorie intake, demographic characteristics, lifestyle, and clinical factors. Comparing the top with the bottom quintiles of AMED, DASH, and AHEI-2010, multivariable-adjusted ORs (95% CIs) for severe SCD compared with none were 0.57 (0.51, 0.64), 0.61 (0.55, 0.68), and 0.81 (0.73, 0.90), respectively. Similar associations remained for the 3 diet indexes evaluated 28 y before SCD assessment. Compared with participants with the lowest diet quality tertiles in both remote and recent years, the lowest odds of severe SCD were observed among those who maintained the highest diet quality tertiles over time, with 40%, 32%, and 20% lower odds of severe SCD for AMED, DASH, and AHEI-2010, respectively. Moreover, the odds of severe SCD were lower among those with improved diets over time; for each SD higher in diet quality change, the reductions in risk were 11% for AMED, 5% for DASH, and 3% for AHEI-2010, respectively.ConclusionsOur findings support beneficial roles of long-term adherence to, and improvement in, healthy dietary patterns for the maintenance of subjective cognition in women.

Project description:ImportanceAlthough consumption of ultraprocessed food has been linked to higher risk of cardiovascular disease, metabolic syndrome, and obesity, little is known about the association of consumption of ultraprocessed foods with cognitive decline.ObjectiveTo investigate the association between ultraprocessed food consumption and cognitive decline in the Brazilian Longitudinal Study of Adult Health.Design, setting, and participantsThis was a multicenter, prospective cohort study with 3 waves, approximately 4 years apart, from 2008 to 2017. Data were analyzed from December 2021 to May 2022. Participants were public servants aged 35 to 74 years old recruited in 6 Brazilian cities. Participants who, at baseline, had incomplete food frequency questionnaire, cognitive, or covariate data were excluded. Participants who reported extreme calorie intake (<600 kcal/day or >6000 kcal/day) and those taking medication that could negatively interfere with cognitive performance were also excluded.ExposuresDaily ultraprocessed food consumption as a percentage of total energy divided into quartiles.Main outcomes and measuresChanges in cognitive performance over time evaluated by the immediate and delayed word recall, word recognition, phonemic and semantic verbal fluency tests, and Trail-Making Test B version.ResultsA total of 15 105 individuals were recruited and 4330 were excluded, leaving 10 775 participants whose data were analyzed. The mean (SD) age at the baseline was 51.6 (8.9) years, 5880 participants (54.6%) were women, 5723 (53.1%) were White, and 6106 (56.6%) had at least a college degree. During a median (range) follow-up of 8 (6-10) years, individuals with ultraprocessed food consumption above the first quartile showed a 28% faster rate of global cognitive decline (β = -0.004; 95% CI, -0.006 to -0.001; P = .003) and a 25% faster rate of executive function decline (β = -0.003, 95% CI, -0.005 to 0.000; P = .01) compared with those in the first quartile.Conclusions and relevanceA higher percentage of daily energy consumption of ultraprocessed foods was associated with cognitive decline among adults from an ethnically diverse sample. These findings support current public health recommendations on limiting ultraprocessed food consumption because of their potential harm to cognitive function.

Dataset Information

Unhealthy foods may attenuate the beneficial relation of a Mediterranean diet to cognitive decline.

Introduction

Methods

Results

Conclusion

Publications

Unhealthy foods may attenuate the beneficial relation of a Mediterranean diet to cognitive decline.

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