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Association of vitamin K with cardiovascular events and all-cause mortality: a systematic review and meta-analysis

Research output: Contribution to journalArticle

Original languageEnglish
Number of pages15
JournalEuropean Journal of Nutrition
DOIs
DateAccepted/In press - 12 May 2019
DatePublished (current) - 22 May 2019

Abstract

Purpose:
We conducted a meta-analysis to systematically assess the prospective association between vitamin K and cardiovascular disease (CVD) events and all-cause mortality.

Methods:
We searched Pubmed and EMBASE through January 2019 for prospective studies that reported the association of vitamin K (assessed by dietary intake or circulating concentration) with CVD events (including total CVD, CVD mortality, total coronary heart disease [CHD], fatal CHD, nonfatal myocardial infarction [MI] and stroke) and all-cause mortality. Multivariable-adjusted hazard ratios (HRs) comparing top versus bottom tertiles of vitamin K were combined using random-effects meta-analysis.

Results:
Twenty-one articles were included with 222,592 participants. A significant association was found between dietary phylloquinone and total CHD (pooled HR: 0.92; 95% CI: 0.84, 0.99; I2 = 0%; 4 studies), as well as menaquinone and total CHD (0.70; 95% CI: 0.53, 0.93; I2 = 32.1%; 2 studies). No significant association was observed between dietary vitamin K and all-cause mortality, CVD mortality or stroke. Elevated plasma desphospho-uncarboxylated MGP (dp-ucMGP), a marker of vitamin K deficiency, was associated with an increased risk of all-cause mortality (1.84; 95% CI: 1.48, 2.28; I2 = 16.8%; 5 studies) and CVD mortality (1.96; 95% CI: 1.47, 2.61; I2 = 0%; 2 studies). No significant association was observed between circulating total osteocalcin and all-cause mortality or total CVD.

Conclusions:
Our findings showed that higher dietary vitamin K consumption was associated with a moderately lower risk of CHD, and higher plasma dp-ucMGP concentration, but not total circulating osteocalcin, was associated with increased risks of all-cause and CVD mortality. However, causal relations cannot be established because of limited number of available studies, and larger prospective studies and randomized clinical trials are needed to validate the findings.

    Research areas

  • Vitamin K, Dp-ucMGP, Osteocalcin, cardiovascular disease, mortality, meta-Analysis

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  • Full-text PDF (accepted author manuscript)

    Rights statement: This is the author accepted manuscript (AAM). The final published version (version of record) is available online via Springer Nature at https://link.springer.com/article/10.1007%2Fs00394-019-01998-3. Please refer to any applicable terms of use of the publisher.

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