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  • Title: The combined clinical impact of red blood cell distribution width and vascular calcification on cardiovascular events and mortality in patients with endstage kidney disease.
    Author: Kim DW, Lee M, Lee KJ, Lee YH, Kim D, Shin SJ, Yoon HE.
    Journal: Kidney Res Clin Pract; 2022 May; 41(3):351-362. PubMed ID: 35286792.
    Abstract:
    BACKGROUND: Little is known about how the interaction between red blood cell distribution width (RDW) and vascular calcification (VC) affects cardiovascular (CV) events and mortality in end-stage kidney disease (ESKD) patients. This study investigated the combined prognostic effect of RDW and VC in ESKD patients starting dialysis. METHODS: A retrospective single-center study of 582 ESKD patients was conducted. VC was assessed by calculating the aortic calcification index (ACI) using computed tomography. Patients were divided into low ACI-low RDW, low ACI-high RDW, high ACI-low RDW, and high ACI-high RDW groups based on median ACI (17.12) and RDW (14.3) values. The association between RDW and VC and the composite endpoint of CV events and death was analyzed. RESULTS: During a median follow-up of 3.1 years (range, 1.5-5.5 years), 165 CV events (28.4%) and 124 deaths (21.4%) occurred. Cox regression showed that the low ACI-high RDW (adjusted hazard ratio [HR], 1.66; 95% confidence interval [CI], 1.04-2.66; p = 0.03) and high ACI-low RDW (adjusted HR, 1.95; 95% CI, 1.21-3.14; p = 0.006) groups had a greater risk of CV events and death than the low ACI-low RDW group. The high ACI-high RDW group had the greatest risk (adjusted HR, 2.23; 95% CI, 1.42-3.52; p = 0.001). The effect of the interaction between ACI and RDW on CV events and mortality was statistically significant (p = 0.005). CONCLUSION: High RDW and VC interact to increase the risk of CV events and death in ESKD patients.
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