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White Rice Intake and Incidence of Type-2 Diabetes: Analysis of Two Prospective Cohort Studies From Iran Publisher Pubmed



Golozar A1, 2 ; Khalili D3 ; Etemadi A1, 4 ; Poustchi H1 ; Fazeltabar A1 ; Hosseini F5 ; Kamangar F6 ; Khoshnia M7 ; Islami F8 ; Hadaegh F3 ; Brennan P9 ; Boffetta P10 ; Abnet CC4 ; Dawsey SM4 Show All Authors
Authors
  1. Golozar A1, 2
  2. Khalili D3
  3. Etemadi A1, 4
  4. Poustchi H1
  5. Fazeltabar A1
  6. Hosseini F5
  7. Kamangar F6
  8. Khoshnia M7
  9. Islami F8
  10. Hadaegh F3
  11. Brennan P9
  12. Boffetta P10
  13. Abnet CC4
  14. Dawsey SM4
  15. Azizi F11
  16. Malekzadeh R1
  17. Danaei G12, 13, 14
Show Affiliations
Authors Affiliations
  1. 1. Digestive Disease Research Institute, Shariati Hospital, Tehran University of Medical Sciences, Tehran, 14117, Iran
  2. 2. Department of Epidemiology, Johns Hopkins Bloomberg School of Public Health, Baltimore, 21205, MD, United States
  3. 3. Prevention of Metabolic Disorders Research Center, Research Institute for Endocrine Sciences, Shahid Beheshti University of Medical Sciences, Tehran, 17413, Iran
  4. 4. Division of Cancer Epidemiology and Genetics, National Cancer Institute, Bethesda, 20850, MD, United States
  5. 5. Nutrition and Endocrine Research Center, Obesity Research Center, Research Institute for Endocrine Sciences, Shahid Beheshti University of Medical Science, Tehran, 17413, Iran
  6. 6. School of Community Health and Policy, Morgan State University, Baltimore, 21251, MD, United States
  7. 7. Golestan Research Center of Gastroenterology and Hepatology, Golestan University of Medical Sciences, Gorgan, 0619, Golestan, Iran
  8. 8. Surveillance and Health Services Research, American Cancer Society, Atlanta, 30303, Georgia, United States
  9. 9. International Agency for Research on Cancer, Lyon, 69008, France
  10. 10. Tisch Cancer Institute, Institute for Translational Epidemiology, Mount Sinai School of Medicine, New York, 10029, NY, United States
  11. 11. Endocrine Research Center, Research Institute for Endocrine Sciences, Shahid Beheshti University of Medical Sciences, Tehran, 17413, Iran
  12. 12. Department of Global Health and Population, Harvard School of Public Health, 677 Huntington Avenue, Bldg 1, Boston, 02115, MA, United States
  13. 13. Department of Epidemiology, Harvard School of Public Health, 677 Huntington Avenue, Bldg 1, Boston, 02115, MA, United States
  14. 14. SAPHIR, Scientific Association for Public Health in Iran, Boston, 02132, United States

Source: BMC Public Health Published:2017


Abstract

Background: Refined grains and white rice have been associated with elevated risk of type 2 diabetes mellitus (T2DM). In this study, we sought to quantify the effect of white rice intake on incident T2DM in two prospective population-based cohort studies from Iran, where white rice is one of the main staple. Methods: We used follow-up data from 9,182 participants from Golestan Cohort Study (GCS, 2004-2007, conducted mainly in rural areas) and 2,173 from Tehran Lipid and Glucose Study (TLGS, 2004-2006) who did not have T2DM and other chronic diseases at baseline. Diet was assessed using validated food frequency questionnaires. Multivariable logistic regression models were used to estimate adjusted odds ratios (ORs) for incident T2DM. Results: We documented 902 new cases of T2DM in GCS and 81 in TLGS. Age-standardized cumulative incidence of T2DM was 9.9% in Golestan and 8.0% in Tehran. Daily white rice intake was significantly higher among residents of Tehran compared to Golestan (median daily intake: 250 vs. 120 grams; P-value < 0.001). After adjustment for potential confounders, there was no significant association between daily white rice intake and incident T2DM in GCS. In TLGS, the adjusted OR (95% confidence interval (CI)) was 2.1 (1.1, 3.9) comparing participants with daily white rice intake of >250 grams/day to those with <250. Conclusions: We observed an increased lieklihood of T2DM associated with high white rice intake among residents of Tehran and no association in Golestan. Our findings, if further supported by other studies, have important public health implications especially for countries where white rice is a major staple and diabetes is increasing rapidly incidence is high. Further research is needed to investigate lack of an association between lower levels of white rice intake and T2DM. © 2017 The Author(s).
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