Index-Based Dietary Patterns and the Risk of Prostate Cancer among Iranian Men

Document Type: Research Articles

Authors

1 Student Research Committee, Faculty of Nutrition Sciences and Food Technology, National Nutrition and Food Technology Research Institute, Shahid Beheshti University of Medical Sciences, Tehran, Iran.

2 Community Nutrition Department, Faculty of Nutrition Sciences and Food Technology, National Nutrition and Food Technology Research Institute (WHO Collaborating Center), Shahid Beheshti University of Medical Sciences, Tehran, Iran.

3 Shohada-e-Tajrish Hospital, Department of Radiation Oncology, Faculty of Medicine, Shahid Beheshti University of Medical Sciences, Tehran, Iran.

4 Department of Clinical Nutrition and Dietetics, School of Nutrition Sciences and Food Technology, Shahid Beheshti University of Medical Sciences, Tehran, Iran.

Abstract

Background and objective: The second most common cancer in men after lung cancer is prostate cancer (PC).
Previous studies assessed the association between food items or food groups and the risk of PC, but diet quality indices
are unique approaches to study any relations between diet and disease. Our objective was to investigate the effect of
healthy eating index (HEI-2010) and Mediterranean-Style Dietary Pattern Score (MSDPS) on PC risk. Methods: In
this case-control study, we recruited 97 patients with MS and 205 control subjects . Dietary intake was evaluted using
a valid and reliable food frequency questionnaire. The HEI and MSDPS were calculated. Logistic regression was used
to evaluate the relationship between HEI and MSDP scores and PC risk after adjusting the confounders. Results: In
comparison to controls, cases had lower score on HEI (61 vs. 70.07; P< 0.001), and higher score on MSDP (26.20 vs.
24.49; P= 0.44). After comparing the highest and the lowest tertile of HEI, we observed a significant decreasing trend
in the risk of PC (p for trend<0.001). Conclusion: Our findings suggested that a high quality diet, according to HEI,
may decrease the risk of PC.

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