Get access

Fruit and vegetable consumption and cognitive decline in aging women

Authors

  • Jae H. Kang ScD,

    Corresponding author
    1. Channing Lab, Department of Medicine, Brigham and Women's Hospital, Harvard Medical School, Boston, MA
    • Channing Lab, 181 Longwood Ave., Boston, MA 02115
    Search for more papers by this author
  • Alberto Ascherio MD, DrPH,

    1. Channing Lab, Department of Medicine, Brigham and Women's Hospital, Harvard Medical School, Boston, MA
    2. Department of Epidemiology, Harvard School of Public Health, Boston, MA
    3. Department of Nutrition, Harvard School of Public Health, Boston, MA
    Search for more papers by this author
  • Francine Grodstein ScD

    1. Channing Lab, Department of Medicine, Brigham and Women's Hospital, Harvard Medical School, Boston, MA
    2. Department of Epidemiology, Harvard School of Public Health, Boston, MA
    Search for more papers by this author

Abstract

We prospectively examined fruit and vegetable intake in relation to cognitive function and decline among aging women. Participants were followed from in 1976 with biennial questionnaires, and food frequency questionnaires were administered in 1984, 1986, and every 4 years thereafter. From 1995 to 2001, we administered, by telephone, six cognitive tests measuring general cognition, verbal memory, category fluency, and working memory. We repeated assessments two years later for 13,388 women (>90% follow-up). We averaged dietary intakes from 1984 through the first cognitive assessment, and used linear regression to obtain multivariable-adjusted mean differences in performance and decline in performance across intake levels. Fruits were not associated with cognition or cognitive decline. However, total vegetable intake was significantly associated with less decline. Specifically, on a global score combining all tests, women in the highest quintile of cruciferous vegetables declined slower (by 0.04 unit; 95% confidence interval, 0.003, 0.07; p trend = 0.1) compared with the lowest quintile. Women consuming the most green leafy vegetables also experienced slower decline than women consuming the least amount (by 0.05 unit; 95% confidence interval, 0.02, 0.09; p trend < 0.001). These mean differences were equivalent to those observed for women about 1 to 2 years apart in age. Ann Neurol 2005;57:713–720

Ancillary