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Association Between Dietary Inflammatory Index and Kidney Function in Elderly Population: Results From a Cross-Sectional Study Publisher



Tajik S1 ; Eimeri S1 ; Mansouri S1 ; Rahimiforoushani A2 ; Shabbidar S1
Authors
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Authors Affiliations
  1. 1. Department of Community Nutrition, School of Nutritional Sciences and Dietetics, Tehran University of Medical Sciences (TUMS), Tehran, Iran
  2. 2. Department of Epidemiology and Biostatistics, School of Public Health, Tehran University of Medical Science, Tehran, Iran

Source: Nutrition and Food Science Published:2019


Abstract

Purpose: This study aims to investigate the association of the dietary inflammatory index (DII), kidney function and high-sensitivity C-reactive protein (hs-CRP) among the senior population (60-83 years). Design/methodology/approach: This cross-sectional study was conducted in 221 elderly subjects who are living in Tehran, Iran. The DII was calculated from validated semi-quantified food frequency questionnaire, combining putatively pro-inflammatory and anti-inflammatory effects of nutrients, vitamins and trace elements. Biochemical measurements of blood and urine samples were measured. The estimated glomerular filtration rate (eGFR) was assessed from serum creatinine. Findings: A total of 221 subjects with mean BMI of 29.75 and age ranged 60-83 years old were included in the current study. Multiple linear regression analysis showed that eGFR (ß = –0.471; p = 0.48; 95 per cent CI: –2.90, 2.63), albumin/creatinine ratio (ACR) (ß = 0.041 p = 0.55; 95 per cent CI: –5.12, 9.46) and hs-CRP (ß = 0.004; p = 0.55; 95 per cent CI: –0.96, 1.79) were not associated with the DII before and after adjusting for potential confounders, including energy intake, age, sex, BMI, smoking status, physical activity, hypertension, diabetes, use of lipid-lowering medication, angiotensin II receptor blockers (ARB) and angiotensin-converting enzyme inhibitor (ACEI), steroidal and non- steroidal anti-inflammatory medications. Research limitations/implications: Due to the cross-sectional nature of this study, it is difficult to find the cause-and-effect relationship between the DII and the serum hs-CRP concentration. Another limitation of our study is concerning a possible overestimation or underestimation of dietary intakes, because the participants in the study were elderly and FFQ is a memory-based questionnaire. Originality/value: Our findings suggest that the DII score is not associated with serum hs-CRP and kidney function markers in elderly people. © 2018, Emerald Publishing Limited.
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