Sara C Staubo1, Jeremiah A Aakre2, Prashanthi Vemuri3, Jeremy A Syrjanen2, Michelle M Mielke4, Yonas E Geda5, Walter K Kremers2, Mary M Machulda6, David S Knopman7, Ronald C Petersen4, Clifford R Jack3, Rosebud O Roberts8. 1. Division of Epidemiology, Department of Health Sciences Research, Mayo Clinic, Rochester, MN, USA; Charles University in Prague, Faculty in Hradec Králové, Hradec Králové, Czech Republic. 2. Division of Biomedical Statistics and Informatics, Department of Health Sciences Research, Mayo Clinic, Rochester, MN, USA. 3. Department of Radiology, Mayo Clinic, Rochester, MN, USA. 4. Division of Epidemiology, Department of Health Sciences Research, Mayo Clinic, Rochester, MN, USA; Department of Neurology, Mayo Clinic, Rochester, MN, USA. 5. Department of Psychiatry and Psychology, Mayo Clinic, Scottsdale, AZ, USA; Department of Neurology, Mayo Clinic, Scottsdale, AZ, USA; Department of Psychiatry and Psychology, Mayo Clinic, Rochester, MN, USA. 6. Department of Psychiatry and Psychology, Mayo Clinic, Rochester, MN, USA. 7. Department of Neurology, Mayo Clinic, Rochester, MN, USA. 8. Division of Epidemiology, Department of Health Sciences Research, Mayo Clinic, Rochester, MN, USA; Department of Neurology, Mayo Clinic, Rochester, MN, USA. Electronic address: roberts.rosebud@mayo.edu.
Abstract
INTRODUCTION: The Mediterranean diet (MeDi) is associated with reduced risk of cognitive impairment, but it is unclear whether it is associated with better brain imaging biomarkers. METHODS: Among 672 cognitively normal participants (mean age, 79.8 years, 52.5% men), we investigated associations of MeDi score and MeDi components with magnetic resonance imaging measures of cortical thickness for the four lobes separately and averaged (average lobar). RESULTS: Higher MeDi score was associated with larger frontal, parietal, occipital, and average lobar cortical thickness. Higher legume and fish intakes were associated with larger cortical thickness: legumes with larger superior parietal, inferior parietal, precuneus, parietal, occipital, lingual, and fish with larger precuneus, superior parietal, posterior cingulate, parietal, and inferior parietal. Higher carbohydrate and sugar intakes were associated with lower entorhinal cortical thickness. DISCUSSION: In this sample of elderly persons, higher adherence to MeDi was associated with larger cortical thickness. These cross-sectional findings require validation in prospective studies.
INTRODUCTION: The Mediterranean diet (MeDi) is associated with reduced risk of cognitive impairment, but it is unclear whether it is associated with better brain imaging biomarkers. METHODS: Among 672 cognitively normal participants (mean age, 79.8 years, 52.5% men), we investigated associations of MeDi score and MeDi components with magnetic resonance imaging measures of cortical thickness for the four lobes separately and averaged (average lobar). RESULTS: Higher MeDi score was associated with larger frontal, parietal, occipital, and average lobar cortical thickness. Higher legume and fish intakes were associated with larger cortical thickness: legumes with larger superior parietal, inferior parietal, precuneus, parietal, occipital, lingual, and fish with larger precuneus, superior parietal, posterior cingulate, parietal, and inferior parietal. Higher carbohydrate and sugar intakes were associated with lower entorhinal cortical thickness. DISCUSSION: In this sample of elderly persons, higher adherence to MeDi was associated with larger cortical thickness. These cross-sectional findings require validation in prospective studies.
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