Seth Ramin1, Margaret A Mysz1, Katie Meyer2, Benjamin Capistrant3, DeAnn Lazovich4, Anna Prizment5. 1. University of Minnesota School of Public Health, Division of Epidemiology and Community Health, Minneapolis, MN, United States. 2. University of North Carolina, Department of Nutrition and Nutrition Research Institute, Chapel Hill, NC, United States. 3. University of Minnesota School of Public Health, Division of Epidemiology and Community Health, Minneapolis, MN, United States; Universty of Minnesota, Minnesota Population Center, Minneapolis, MN, United States; Smith College, School of Social Work, Northampton, MA, United States. 4. University of Minnesota School of Public Health, Division of Epidemiology and Community Health, Minneapolis, MN, United States; University of Minnesota Masonic Cancer Center, Minneapolis, MN, United States. 5. University of Minnesota School of Public Health, Division of Epidemiology and Community Health, Minneapolis, MN, United States; University of Minnesota Masonic Cancer Center, Minneapolis, MN, United States. Electronic address: prizm001@umn.edu.
Abstract
OBJECTIVE: Recent studies have reported associations between dietary intake and mental health. Dietary fiber is one nutrient that may modulate mental health, specifically depression risk, through the gut microbiome. We prospectively examined the association between dietary fiber intake and mental health-related quality of life (QOL) scores, a proxy for depressive symptoms, in a cohort of 14,129 post-menopausal women in the Iowa Women's Health Study. METHODS: Dietary intake was assessed at baseline [1986] using a 127-item food frequency questionnaire. Mental health-related QOL scores were assessed at the follow-up questionnaire [2004] using the Mental Health (MH) component and Mental Health Composite (MCS) scales derived from the SF-36 Health Survey. The association between dietary fiber intake and mean QOL scores was examined using linear regression, with adjustment for age, alcohol intake, energy intake, waist-to-hip ratio, physical activity, smoking status, and education. RESULTS: The median dietary fiber intake was 19.0 g/day, ranging from 1.1 to 89.4 g/day. Multivariable-adjusted mean MH scores were higher among those with higher fiber intake (P for trend = 0.02). For MCS score, the association with fiber intake observed in a model adjusted for age and energy intake became insignificant after multivariable adjustment. CONCLUSIONS: Our study is one of the first prospective analyses of the association between higher dietary fiber intake and increased MH QOL scores later in life. Given a plausible biological mechanism underlying the association between fiber intake and mental health, additional studies are warranted.
OBJECTIVE: Recent studies have reported associations between dietary intake and mental health. Dietary fiber is one nutrient that may modulate mental health, specifically depression risk, through the gut microbiome. We prospectively examined the association between dietary fiber intake and mental health-related quality of life (QOL) scores, a proxy for depressive symptoms, in a cohort of 14,129 post-menopausal women in the Iowa Women's Health Study. METHODS: Dietary intake was assessed at baseline [1986] using a 127-item food frequency questionnaire. Mental health-related QOL scores were assessed at the follow-up questionnaire [2004] using the Mental Health (MH) component and Mental Health Composite (MCS) scales derived from the SF-36 Health Survey. The association between dietary fiber intake and mean QOL scores was examined using linear regression, with adjustment for age, alcohol intake, energy intake, waist-to-hip ratio, physical activity, smoking status, and education. RESULTS: The median dietary fiber intake was 19.0 g/day, ranging from 1.1 to 89.4 g/day. Multivariable-adjusted mean MH scores were higher among those with higher fiber intake (P for trend = 0.02). For MCS score, the association with fiber intake observed in a model adjusted for age and energy intake became insignificant after multivariable adjustment. CONCLUSIONS: Our study is one of the first prospective analyses of the association between higher dietary fiber intake and increased MH QOL scores later in life. Given a plausible biological mechanism underlying the association between fiber intake and mental health, additional studies are warranted.
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