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The Relationship Between Dietary Patterns and Rheumatoid Arthritis: A Case-Control Study Publisher



Nezamoleslami S1 ; Ghiasvand R2 ; Feizi A3 ; Salesi M4 ; Pourmasoumi M5
Authors
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Authors Affiliations
  1. 1. Department of Community Nutrition, School of Nutrition and Food Science, Isfahan University of Medical Sciences, Isfahan, Iran
  2. 2. Department of Community Nutrition, School of Nutrition and Food Science, Isfahan University of Medical Sciences, P.O. Box 81745, Isfahan, Iran
  3. 3. Department of Biostatistics and Epidemiology, School of Public Health, Isfahan University of Medical Sciences, Isfahan, Iran
  4. 4. Department of Rheumatology, Isfahan University of Medical Sciences, Isfahan, Iran
  5. 5. Gastrointestinal and Liver Diseases Research Center, Guilan University of Medical Sciences, Rasht, Iran

Source: Nutrition and Metabolism Published:2020


Abstract

Background and aim: A number of studies have investigated the effects of individual foods and/or nutrients on rheumatoid arthritis (RA), but research focusing on whole dietary patterns remains limited. The association of dietary patterns and rheumatoid arthritis is therefore not well elucidated. This study aims to determine existing relationships between major identified dietary patterns and RA. Methods: This matched case-control study was conducted on 297 individuals in Isfahan, Iran. The presence of RA was determined by an expert rheumatologist, based on the American College of Rheumatology definitions, 2010. A 168-item questionnaire was used to collect dietary data. Major dietary patterns were identified using the factor analysis method. Results: Two major dietary patterns, namely, healthy and western dietary patterns, were identified. Lower adherence to the healthy dietary pattern was associated with increased risk of RA (OR = 2.80; 95% CI 1.74-4.67; P < 0.001). The association remained significant even after taking other confounders into account (OR = 2.85; 95% CI 1.12-7.45; P = 0.03). A positively significant association was also observed between adherence to western dietary pattern and RA in the fully-adjusted final model (OR = 2.22; 95% CI 1.04-4.72; P = 0.03). Conclusions: The study suggests that there is an inverse association between adherence to a healthy dietary pattern and the odds of RA, and a positive significant relationship was found between western dietary pattern and RA. Further studies are required to confirm these findings. © 2020 The Author(s).
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