FAT-FREE MASS AND ARTERIAL STIFFNESS IN CHRONIC KIDNEY DISEASE: FROM THE KNOW-CKD STUDY

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FAT-FREE MASS AND ARTERIAL STIFFNESS IN CHRONIC KIDNEY DISEASE: FROM THE KNOW-CKD STUDY

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Co-author 1

Ju Young Lee elsta717@gmail.com Kangbuk Samsung Hospital, Sungkyunkwan University School of Medicine Internal Medicine Seoul Korea (Republic of) -

Co-author 2

Yujung Kim yujung57@naver.com Kangbuk Samsung Hospital, Sungkyunkwan University School of Medicine Internal Medicine Seoul Korea (Republic of) -

Co-author 3

Jihyun Yang coo-kie@daum.net Kangbuk Samsung Hospital, Sungkyunkwan University School of Medicine Internal Medicine Seoul Korea (Republic of) -

Co-author 4

Kyu-Beck Lee kyubeck.lee@samsung.com Kangbuk Samsung Hospital, Sungkyunkwan University School of Medicine Internal Medicine Seoul Korea (Republic of) -

Co-author 5

Kook-Hwan Oh khoh@snu.ac.kr Seoul National University College of Medicine Internal Medicine Seoul Korea (Republic of) -

Co-author 6

Young Youl Hyun femur0@naver.com Kangbuk Samsung Hospital, Sungkyunkwan University School of Medicine Internal Medicine Seoul Korea (Republic of) *

Co-author 7

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Introduction

Arterial stiffness measured by pulse wave velocity (PWV) is increased in chronic kidney disease (CKD) and is associated with the risk of high cardiovascular complication and mortality. Previous studies have shown that body composition is associated with arterial stiffness. However, there is relatively less data in CKD, and body composition and its clinical implication is different in CKD from the general population. The aim of this study is to investigate the association between different markers of body composition and arterial stiffness in CKD.

Methods

This study analyzed 356 participants from the KNOW-CKD phase 2 cohort. They underwent anthropometry measurement and bioimpedance analysis. As markers of body composition, we used body mass index (BMI), waist circumferences (WST), waist-to-hip ratio (WHR), fat mass (FAT) and fat-free mass (FFM). Arterial stiffness was assessed by brachial-ankle pulse wave velocity (baPWV). Participants were divided into 3 groups according to their sex-specific fat-free mass (FFM) tertiles.

Results

baPWV (cm/s) were lower in groups with higher FFM tertiles (1736±473, 1645±382 and 1520±347 for the 1st to 3rd tertiles of sex-specific FFM, respectively, P for trend<0.001). Among body composition markers, BMI, WST and FFM were inversely associated with baPWV in multivariate linear regression model. When analyzing both BMI and FFM, or both WST and FFM at the same time, only FFM was significantly associated with baPWV.

Conclusion

Fat-free mass rather than BMI, waist circumference or fat mass was associated with arterial stiffness in CKD. The higher the fat-free mass, the lower the arterial stiffness.

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