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Published in: International Urology and Nephrology 3/2019

01-03-2019 | Peritoneal Dialysis | Nephrology - Original paper

Associations of vitamin K status with mortality and cardiovascular events in peritoneal dialysis patients

Authors: Qingdong Xu, Huankai Guo, Shirong Cao, Qian Zhou, Jiexin Chen, Ming Su, Siying Chen, Songqin Jiang, Xiaofeng Shi, Yueqiang Wen

Published in: International Urology and Nephrology | Issue 3/2019

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Abstract

Purpose

Vitamin K deficiency, expressed by a high level of desphospho-uncarboxylated matrix GLA protein (dp-ucMGP), is highly prevalent in dialysis patients. However, the predictive ability of the vitamin K status remains unclear in continuous ambulatory peritoneal dialysis (CAPD) patients.

Methods

158 prevalent CAPD patients with a median level of dp-ucMGP of 1093 (752, 1485) pmol/L were enrolled. Patient outcomes including all-cause mortality and cardiovascular events (CVEs) were recorded during follow-up. Survival curves were performed using Kaplan–Meier method, and the influences of dp-ucMGP on outcomes were analyzed by Cox regression models.

Results

A total of 59 deaths and 82 new episodes of CVEs occurred during median follow-up of 31.4 ± 13.1 months (range: 3.8–48.0 months). Kaplan–Meier analysis revealed patients with higher dp-ucMGP levels (≥ 1093 pmol/L) had an increased risk for both mortality (P = 0.005) and CVEs (P < 0.001). Multivariable Cox regression confirmed that higher dp-ucMGP levels increase the mortality risk [hazard ratio (HR), 1.763; 95% CI 1.045–3.291] and CVEs (HR, 1.846; 95% CI 1.074–3.172). For every 100 pmol/L increase in serum dp-ucMGP, the adjusted HRs for mortality and CVEs were 1.054 (95% CI 1.008–1.106) and 1.034 (95% CI 1.012–1.089), respectively.

Conclusions

Vitamin K deficiency, as expressed by high dp-ucMGP levels, showed independently associations with mortality and CVEs in CAPD patients.
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Metadata
Title
Associations of vitamin K status with mortality and cardiovascular events in peritoneal dialysis patients
Authors
Qingdong Xu
Huankai Guo
Shirong Cao
Qian Zhou
Jiexin Chen
Ming Su
Siying Chen
Songqin Jiang
Xiaofeng Shi
Yueqiang Wen
Publication date
01-03-2019
Publisher
Springer Netherlands
Published in
International Urology and Nephrology / Issue 3/2019
Print ISSN: 0301-1623
Electronic ISSN: 1573-2584
DOI
https://doi.org/10.1007/s11255-019-02080-x

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