• Preventive medicine · Aug 2022

    Basic lifestyle habits and volume change in total gray matter among community dwelling middle-aged and older Japanese adults.

    • Rei Otsuka, Yukiko Nishita, Akinori Nakamura, Takashi Kato, Fujiko Ando, Hiroshi Shimokata, and Hidenori Arai.
    • Department of Epidemiology of Aging, Research Institute, National Center for Geriatrics and Gerontology, Aichi 474-8511, Japan. Electronic address: otsuka@ncgg.go.jp.
    • Prev Med. 2022 Aug 1; 161: 107149.

    AbstractThe brain controls human behavior, and the gray matter is the main resource of neuronal cells. We examined the longitudinal relationship between six basic lifestyle habits (diet, exercise, sleep, alcohol consumption, smoking, and social activity including employment) and total gray matter volume in community-dwelling adults in Japan. This two-year follow-up study with data derived from the National Institute for Longevity Sciences, Longitudinal Study of Aging, Aichi, Japan, included adults aged 40-87 years (n = 1665, men: 51%). Lifestyle habits were assessed at baseline (2008-2010) using self-reported questionnaires and three-day dietary records. Total gray matter volume at baseline and after two years was estimated using T1-weighted brain magnetic resonance imaging and FreeSurfer software. The association between each lifestyle factor, the total number of healthy lifestyle habits, and gray matter volume change was determined via a multiple linear regression analysis adjusting for baseline age, total gray matter volume, and other confounders. The mean ± standard deviation decrease in total gray matter volume during the two-year follow-up period was 0.94 ± 1.86% in men and 0.61 ± 2.27% in women. In the multiple regression analysis, volume loss in total gray matter positively correlated with male smoking, while it was negatively correlated with male social activity and employment, female dietary diversity, and the total number of healthy lifestyle habits (standardized beta coefficient; -0.061 in men [p = 0.07], -0.113 in women [p < 0.05]). Therefore, engaging in social activities, non-smoking, a diverse diet, or adopting one healthy lifestyle habit may help prevent gray matter volume loss.Copyright © 2022 The Authors. Published by Elsevier Inc. All rights reserved.

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