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Dietary Glycemic Index and Glycemic Load and the Risk of Prostate Cancer: An Updated Systematic Review and Dose–Response Meta-Analysis Publisher Pubmed



Sadeghi A1, 2, 3, 9 ; Sadeghi O2, 4 ; Khodadost M5, 6 ; Pirouzi A1 ; Hosseini B7 ; Saedisomeolia A3, 8
Authors
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Authors Affiliations
  1. 1. Gerash University of Medical Sciences, Gerash, Iran
  2. 2. Students' Scientific Research Center, Tehran University of Medical Sciences, Tehran, Iran
  3. 3. Department of Cellular and Molecular Nutrition, School of Nutritional Sciences and Dietetics, Tehran University of Medical Sciences, Tehran, Iran
  4. 4. Department of Community Nutrition, School of Nutritional Sciences and Dietetics, Tehran University of Medical Sciences, Tehran, Iran
  5. 5. Department of Epidemiology, School of Public Health, Shahid Beheshti University of Medical Sciences, Tehran, Iran
  6. 6. Department of Epidemiology, School of Public Health, Iran University of Medical Sciences, Tehran, Iran
  7. 7. School of Biomedical Sciences and Pharmacy, University of Newcastle, Callaghan, NSW, Australia
  8. 8. Discipline of Pharmacology, School of Medicine, Western Sydney University, Sydney, NSW, Australia
  9. 9. Larestan University of Medical Sciences, Larestan, Iran

Source: Nutrition and Cancer Published:2020


Abstract

A meta-analysis in 2015 revealed no significant association between glycemic index (GI), glycemic load (GL), and prostate cancer. Moreover, until now, no study has examined the dose–response association of GI, GL, and prostate cancer yet. The online databases were searched by two independent researchers for relevant publications up to Jan. 2019, using relevant keywords. Nine studies including five prospective and four case–control studies were included in the current systematic review and meta-analysis. These studies have included 290,911 individuals. We found a significant positive dose–response association between dietary GI and prostate cancer (Pnonlinearity = 0.03). Comparing individuals in the highest category of GI with those in the lowest category, no significant association was found between GI and prostate cancer (combined effect size: 1.08, 95% CI: 0.97–1.19, P = 0.17). Furthermore, no significant association was seen between dietary GL and prostate cancer in both dose–response analysis and when comparing the highest versus lowest categories of GL (combined effect size: 1.03, 95% CI: 0.91–1.16, P = 0.65). In conclusion, we found a significant positive dose–response association between dietary GI and prostate cancer. However, significant association was not seen for dietary GL. © 2019, © 2019 Taylor & Francis Group, LLC.
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