The journal of nutrition, health & aging

, Volume 18, Issue 5, pp 496–502

Long-term intake of nuts in relation to cognitive function in older women

Authors

    • Channing Division of Network Medicine, Department of MedicineBrigham & Women’s Hospital and Harvard Medical School
    • Department of EpidemiologyHarvard School of Public Health
    • Channing Division of Network MedicineBrigham and Women’s Hospital
  • O. Okereke
    • Channing Division of Network Medicine, Department of MedicineBrigham & Women’s Hospital and Harvard Medical School
    • Department of EpidemiologyHarvard School of Public Health
    • Department of PsychiatryBrigham & Women’s Hospital and Harvard Medical School
  • E. Devore
    • Channing Division of Network Medicine, Department of MedicineBrigham & Women’s Hospital and Harvard Medical School
  • B. Rosner
    • Channing Division of Network Medicine, Department of MedicineBrigham & Women’s Hospital and Harvard Medical School
    • Department of BiostatisticsHarvard School of Public Health
  • M. Breteler
    • Department of EpidemiologyHarvard School of Public Health
    • German Center for Neurodegenerative Diseases
  • F. Grodstein
    • Channing Division of Network Medicine, Department of MedicineBrigham & Women’s Hospital and Harvard Medical School
    • Department of EpidemiologyHarvard School of Public Health
Article

DOI: 10.1007/s12603-014-0014-6

Cite this article as:
O’Brien, J., Okereke, O., Devore, E. et al. J Nutr Health Aging (2014) 18: 496. doi:10.1007/s12603-014-0014-6

Abstract

Objective

Nuts contain nutrients that may benefit brain health; thus, we examined long-term intake of nuts in relation to cognition in older women.

Design

Population-based prospective cohort study.

Setting

Academic research using data from the Nurses’ Health Study.

Participants

Nut intake was assessed in a food-frequency questionnaire beginning inl980, and approximately every four years thereafter. Between 1995–2001, 16,010 women age 70 or older (mean age = 74 years) without a history of stroke were administered 4 repeated telephone-based cognitive interviews over 6 years. Our final sample included 15,467 women who completed an initial cognitive interview and had complete information on nut intake.

Main Outcome Measures

The Telephone Interview for Cognitive Status (TICS), a global score averaging the results of all tests (TICS, immediate and delayed verbal recall, category fluency, and attention), and a verbal memory score averaging the results of tests of verbal recall.

Results

In multivariable-adjusted linear regression models, higher long-term total nut intake was associated with better average cognitive status for all cognitive outcomes. For the global composite score combining all tests, women consuming at least 5 servings of nuts/week had higher scores than non-consumers (mean difference=0.08 standard units, 95% confidence interval 0.00–0.15; p-trend=0.003). This mean difference of 0.08 is equivalent to the mean difference we find between women 2 years apart in age. Long-term intake of nuts was not associated with rates of cognitive decline.

Conclusions

Higher nut intake may be related to better overall cognition at older ages, and could be an easily-modifiable public health intervention.

Key words

Cognition cognitive decline cognitive function cohort study diet epidemiology nutrition

Abbreviations

ALA

α-linolenic acid

BMI

body mass index

CI

confidence interval

FFQ

food-frequency questionnaire

MET-h

metabolic equivalence hour

MUFA

monounsaturated fatty acid

NHS

Nurses’ Health Study

PUFA

polyunsaturated fatty acid

SD

standard deviation

TICS

Telephone Interview for Cognitive Status

Copyright information

© Serdi and Springer-Verlag France 2014