James E Gangwisch1, Lauren Hale2, Lorena Garcia3, Dolores Malaspina4, Mark G Opler4, Martha E Payne5, Rebecca C Rossom6, Dorothy Lane7. 1. Department of Psychiatry, College of Physicians and Surgeons, Columbia University, New York, NY; jeg64@columbia.edu. 2. Program of Public Health and Department of Preventive Medicine, Stony Brook Medicine, Stony Brook University, Stony Brook, NY; 3. Department of Public Health Sciences, School of Medicine, University of California-Davis, Davis, CA; 4. Department of Psychiatry, New York University Langone Medical Center, New York, NY; 5. Center for the Study of Aging and Human Development and the Department of Psychiatry and Behavioral Sciences, Duke University Medical Center, Durham, NC; and. 6. Health Partners Institute for Education and Research and Department of Psychiatry, University of Minnesota Medical School, Minneapolis, MN. 7. Department of Preventive Medicine, Stony Brook Medicine, Stony Brook University, Stony Brook, NY;
Abstract
BACKGROUND: The consumption of sweetened beverages, refined foods, and pastries has been shown to be associated with an increased risk of depression in longitudinal studies. However, any influence that refined carbohydrates has on mood could be commensurate with their proportion in the overall diet; studies are therefore needed that measure overall intakes of carbohydrate and sugar, glycemic index (GI), and glycemic load. OBJECTIVE: We hypothesized that higher dietary GI and glycemic load would be associated with greater odds of the prevalence and incidence of depression. DESIGN: This was a prospective cohort study to investigate the relations between dietary GI, glycemic load, and other carbohydrate measures (added sugars, total sugars, glucose, sucrose, lactose, fructose, starch, carbohydrate) and depression in postmenopausal women who participated in the Women's Health Initiative Observational Study at baseline between 1994 and 1998 (n = 87,618) and at the 3-y follow-up (n = 69,954). RESULTS: We found a progressively higher dietary GI to be associated with increasing odds of incident depression in fully adjusted models (OR for the fifth compared with first quintile: 1.22; 95% CI: 1.09, 1.37), with the trend being statistically significant (P = 0.0032). Progressively higher consumption of dietary added sugars was also associated with increasing odds of incident depression (OR for the fifth compared with first quintile: 1.23; 95% CI: 1.07, 1.41; P-trend = 0.0029). Higher consumption of lactose, fiber, nonjuice fruit, and vegetables was significantly associated with lower odds of incident depression, and nonwhole/refined grain consumption was associated with increased odds of depression. CONCLUSIONS: The results from this study suggest that high-GI diets could be a risk factor for depression in postmenopausal women. Randomized trials should be undertaken to examine the question of whether diets rich in low-GI foods could serve as treatments and primary preventive measures for depression in postmenopausal women.
BACKGROUND: The consumption of sweetened beverages, refined foods, and pastries has been shown to be associated with an increased risk of depression in longitudinal studies. However, any influence that refined carbohydrates has on mood could be commensurate with their proportion in the overall diet; studies are therefore needed that measure overall intakes of carbohydrate and sugar, glycemic index (GI), and glycemic load. OBJECTIVE: We hypothesized that higher dietary GI and glycemic load would be associated with greater odds of the prevalence and incidence of depression. DESIGN: This was a prospective cohort study to investigate the relations between dietary GI, glycemic load, and other carbohydrate measures (added sugars, total sugars, glucose, sucrose, lactose, fructose, starch, carbohydrate) and depression in postmenopausal women who participated in the Women's Health Initiative Observational Study at baseline between 1994 and 1998 (n = 87,618) and at the 3-y follow-up (n = 69,954). RESULTS: We found a progressively higher dietary GI to be associated with increasing odds of incident depression in fully adjusted models (OR for the fifth compared with first quintile: 1.22; 95% CI: 1.09, 1.37), with the trend being statistically significant (P = 0.0032). Progressively higher consumption of dietary added sugars was also associated with increasing odds of incident depression (OR for the fifth compared with first quintile: 1.23; 95% CI: 1.07, 1.41; P-trend = 0.0029). Higher consumption of lactose, fiber, nonjuice fruit, and vegetables was significantly associated with lower odds of incident depression, and nonwhole/refined grain consumption was associated with increased odds of depression. CONCLUSIONS: The results from this study suggest that high-GI diets could be a risk factor for depression in postmenopausal women. Randomized trials should be undertaken to examine the question of whether diets rich in low-GI foods could serve as treatments and primary preventive measures for depression in postmenopausal women.
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