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Glycemic Index, Glycemic Load, and Common Psychological Disorders Publisher Pubmed



Haghighatdoost F1, 2 ; Azadbakht L1, 2, 5 ; Keshteli AH6 ; Feinlebisset C7 ; Daghaghzadeh H3 ; Afshar H3 ; Feizi A4 ; Esmaillzadeh A1 ; Adibi P3
Authors
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Authors Affiliations
  1. 1. Food Security Research Center, School of Nutrition and Food Science, Ireland
  2. 2. Department of Community Nutrition, School of Nutrition and Food Science, United States
  3. 3. Integrative Functional Gastroenterology Research Center, United States
  4. 4. Biostatistics and Epidemiology Department, School of Health, Isfahan University of Medical Sciences, Isfahan, Iran
  5. 5. Department of Community Nutrition, School of Nutritional Sciences and Dietetics, Tehran University of Medical Sciences, Tehran, Iran
  6. 6. Department of Medicine, University of Alberta, Edmonton, Canada
  7. 7. University of Adelaide Discipline of Medicine and National Health, Med. Res. Council Centre of Research Excellence of Translating Nutritional Science to Good Health, Adelaide, Australia

Source: American Journal of Clinical Nutrition Published:2016


Abstract

Background: Potential associations between dietary glycemic index (GI) and glycemic load (GL) with psychological disorders remain uncertain. Objective: We investigated the relations of dietary GI and GL with psychological distress, anxiety, and depression. Design: A total of 3363 nonacademic members of the staff of Isfahan University of Medical Sciences were included in this cross-sectional study. GI and GL were assessed by using a validated, self-administered, dish-based, semiquantitative food-frequency questionnaire. Validated Iranian versions of the Hospital Anxiety and Depression Scale and General Health Questionnaire-12 were used to assess anxiety, depression, and psychological distress. Results: After control for potential confounders, individuals in the top tertile of GI had greater odds of depression (OR: 1.44; 95% CI: 1.03, 2.02; P-trend = 0.03) and a trend for greater odds of anxiety (OR: 1.52; 95% CI: 0.97, 2.38; Ptrend = 0.06) compared with those in the first tertile. Higher GL values were linked to lower odds for mental disorders (OR: 0.66; 95% CI: 0.49, 0.90; P-trend = 0.009), depression (OR: 0.69; 95% CI: 0.51, 0.93; P-trend = 0.02), and psychological distress (OR: 0.67; 95% CI: 0.48, 0.92; P-trend = 0.01). Significant interactions were observed between GI and sex for depression (P = 0.01) and psychological distress (P = 0.046) in the crude model. In stratified analyses by sex, after control for potential confounders, a greater GI was linked to a higher odds of depression (OR: 1.52; 95% CI: 1.20, 1.94; P-trend = 0.001) and psychological distress (OR: 1.66; 95% CI: 1.28, 2.14; P-trend = 0.001) in women but not in men. Conclusion: Our findings support a direct link between the odds of depression and dietary GI but inverse associations between GL and mental disorders, depression, and psychological distress. © 2016 American Society for Nutrition.
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