Takako Miki1, Masafumi Eguchi2, Kayo Kurotani3, Takeshi Kochi2, Keisuke Kuwahara4, Rie Ito2, Yasumi Kimura5, Hiroko Tsuruoka2, Shamima Akter3, Ikuko Kashino3, Isamu Kabe2, Norito Kawakami6, Tetsuya Mizoue3. 1. Department of Epidemiology and Prevention, Center for Clinical Sciences, National Center for Global Health and Medicine, Tokyo, Japan; Department of Mental Health, Graduate School of Medicine, The University of Tokyo, Tokyo, Japan. Electronic address: takakomiki-tky@umin.ac.jp. 2. Department of Health Administration, Furukawa Electric Corporation, Tokyo, Japan. 3. Department of Epidemiology and Prevention, Center for Clinical Sciences, National Center for Global Health and Medicine, Tokyo, Japan. 4. Department of Epidemiology and Prevention, Center for Clinical Sciences, National Center for Global Health and Medicine, Tokyo, Japan; Teikyo University Graduate School of Public Health, Tokyo, Japan. 5. Department of Nutrition and Life Science, Faculty of Life Science and Biotechnology, Fukuyama University, Hiroshima, Japan. 6. Department of Mental Health, Graduate School of Medicine, The University of Tokyo, Tokyo, Japan.
Abstract
OBJECTIVE: Dietary fiber may play a favorable role in mood through gut microbiota, but epidemiologic evidence linking mood to dietary fiber intake is scarce in free-living populations. We investigated cross-sectionally the associations of dietary intakes of total, soluble, insoluble, and sources of fiber with depressive symptoms among Japanese workers. METHODS: Participants were 1977 employees ages 19-69 y. Dietary intake was assessed via a validated, brief self-administered diet history questionnaire. Depressive symptoms were assessed using the Center for Epidemiologic Studies Depression Scale. Logistic regression was used to estimate odds ratios of depressive symptoms adjusted for a range of dietary and non-dietary potential confounders. RESULTS: Dietary fiber intake from vegetables and fruits was significantly inversely associated with depressive symptoms. The multivariable-adjusted odds ratios (95% confidence intervals) for the lowest through the highest tertile of vegetable and fruit fiber were 1.00 (reference), 0.80 (0.60-1.05), and 0.65 (0.45-0.95), respectively (P for trend = 0.03). Dietary intake of total, soluble, insoluble, and cereal fiber was not associated with depressive symptoms. CONCLUSIONS: Higher dietary fiber intake from vegetables and fruits may be associated with lower likelihood of having depressive symptoms.
OBJECTIVE: Dietary fiber may play a favorable role in mood through gut microbiota, but epidemiologic evidence linking mood to dietary fiber intake is scarce in free-living populations. We investigated cross-sectionally the associations of dietary intakes of total, soluble, insoluble, and sources of fiber with depressive symptoms among Japanese workers. METHODS:Participants were 1977 employees ages 19-69 y. Dietary intake was assessed via a validated, brief self-administered diet history questionnaire. Depressive symptoms were assessed using the Center for Epidemiologic Studies Depression Scale. Logistic regression was used to estimate odds ratios of depressive symptoms adjusted for a range of dietary and non-dietary potential confounders. RESULTS: Dietary fiber intake from vegetables and fruits was significantly inversely associated with depressive symptoms. The multivariable-adjusted odds ratios (95% confidence intervals) for the lowest through the highest tertile of vegetable and fruit fiber were 1.00 (reference), 0.80 (0.60-1.05), and 0.65 (0.45-0.95), respectively (P for trend = 0.03). Dietary intake of total, soluble, insoluble, and cereal fiber was not associated with depressive symptoms. CONCLUSIONS: Higher dietary fiber intake from vegetables and fruits may be associated with lower likelihood of having depressive symptoms.