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1 "Jialei Fu"
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Original Article
The association of dietary patterns with incident chronic kidney disease and kidney function decline among middle-aged Korean adults: a cohort study
Jialei Fu, Sangah Shin
Epidemiol Health. 2023;45:e2023037.   Published online March 21, 2023
DOI: https://doi.org/10.4178/epih.e2023037
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Abstract
OBJECTIVES
This study assessed the association of dietary patterns with the incidence of chronic kidney disease (CKD) and kidney function decline among Korean adults.
METHODS
Data were collected from the records of 20,147 men and 39,857 women who participated in the Health Examinees study. Principal component analysis was used to identify 3 dietary patterns (prudent, flour-based food and meat, and white rice-based), and CKD risk was defined using the Epidemiology Collaboration equation for estimated glomerular filtration rate: (eGFR) <60 mL/min/1.73 m<sup>2</sup>. A kidney function decline was defined as a >25% decrease in eGFR from baseline.
RESULTS
During the 4.2-year follow-up, 978 participants developed CKD and 971 had a 25% decline in kidney function. After adjusting for potential impact variables, compared with the lowest quartile of the prudent dietary pattern, participants in the highest quartile had a 37% lower risk of kidney function decline among men (hazard ratio [HR], 0.63; 95% confidence interval [CI], 0.47 to 0.85); while higher adherence to the flour-based food and meat dietary pattern was associated with an increased risk of CKD in both men (HR, 1.63; 95% CI, 1.22 to 2.19) and women (HR, 1.47; 95% CI, 1.05 to 2.05) as well as a decline in kidney function in both men (HR, 1.49; 95% CI, 1.07 to 2.07) and women (HR, 1.77; 95% CI, 1.33 to 2.35).
CONCLUSIONS
Although a higher adherence to the prudent dietary pattern was inversely associated with the risk of kidney function decline in men, there was no association with CKD risk. In addition, a higher adherence to the flour-based food and meat dietary pattern increased the risk of CKD and kidney function decline. Further clinical trials are needed to confirm these associations.
Summary
Korean summary
건강한 식이패턴(prudent dietary pattern)은 한국 남성의 신장기능 저하 위험을 감소와 관련성이 있었다. 반면, 밀가루 음식과 육류 위주의 식이패턴(Flour-based food and meat dietary pattern)은 남성과 여성 모두에서 신장 기능 저하 위험뿐만 아니라, 만성신장질환(CKD) 위험의 증가와 관련이 있었다. 본 연구의 결과는 한국 성인에서 식사패턴이 신장 기능 및 만성 신장 질환의 발생에 미치는 영향을 확인하였다.
Key Message
1. Better adherence to the prudent dietary pattern may lower the risk of kidney function decline in Korean man. 2. A higher adherence to the flour-based food and meat dietary pattern may higher the risk of chronic kidney disease and kidney function decline.

Epidemiol Health : Epidemiology and Health