Evidence map›Paper›PMID 32694169›Full record

ArticleClinical medicine (London, England)2020

Von Willebrand factor (vWF): marker of endothelial damage and thrombotic risk in COVID-19?

Eleni E Ladikou, Helena Sivaloganathan, Kate M Milne, William E Arter, Roshan Ramasamy, Ramy Saad, Simon M Stoneham, Barbara Philips, Alice C Eziefula, Timothy Chevassut

Open access · diamondAbstract readMulticenter Study
In one paragraph

Article in Clinical medicine (London, England), 2020. The graph could read no effect estimate from its abstract, so it casts no vote on the map. Cited by 85 papers, 3 of them syntheses that pooled it.

0numbers the graph read from it
0cells of the map it votes in
85citing papers in PubMed, 3 pooled it
2.7field-weighted citation impact, top 6% of its field
1 · What the graph read from it

What it found

Each row is one number read from the abstract, on the scale the paper reported it, with its interval. Left of the dashed line favours the treatment, right favours the comparator. Under each row is the sentence it came from. New to these charts? A ten-minute tutorial.

The abstract states no effect estimate the extractor could read, or names no intervention and outcome on the map, so this paper lights no cell and moves no belief. It is still indexed, cited and linked below.

2 · The registry

The trial behind it

Trials whose registry record cites this paper, or whose number appears in the abstract. A trial that started after this paper was published is citing it as background, not reporting it.

Neither the registry nor the abstract names a trial number. If this is a trial report, that itself is worth knowing.

3 · Its place in the literature

Who cites it

85 citing papers in PubMed, 3 syntheses or guidelines pooled it, 137 citations in OpenAlex.

  1. Endotheliopathy in Acute COVID-19 and Long COVID.International journal of molecular sciences · 2023
    Pooled it
  2. Endotheliopathy marked by high von Willebrand factor (vWF) antigen in COVID-19 is associated with poor outcome: a systematic review and meta-analysis.International journal of infectious diseases : IJID : official publication of the International Society for Infectious Diseases · 2022
    Pooled it
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  13. Genes · 2025
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  19. Thromboembolic Events in the Era of COVID-19: A Detailed Narrative Review.The Canadian journal of infectious diseases & medical microbiology = Journal canadien des maladies infectieuses et de la microbiologie medicale · 2025
    Review
  20. Article

25 more citing papers are in PubMed but not listed here.

4 · The record

Corrections and comments

5 · Who and what money

Authors and funding

10 authors at 4 institutions in 1 country.

Eleni E LadikouBrighton and Sussex University Hospitals NHS Trust, Brighton, UK and Brighton and Sussex Medical School, Falmer, UK.
Helena SivaloganathanBrighton and Sussex University Hospitals NHS Trust, Brighton, UK and Brighton and Sussex Medical School, Falmer, UK.
Kate M MilneBrighton and Sussex University Hospitals NHS Trust, Brighton, UK and Brighton and Sussex Medical School, Falmer, UK.
William E ArterDepartment of Chemistry, University of Cambridge, Cambridge, UK.
Roshan RamasamyBrighton and Sussex University Hospitals NHS Trust, Brighton, UK.
Ramy SaadBrighton and Sussex University Hospitals NHS Trust, Brighton, UK.
Simon M StonehamBrighton and Sussex University Hospitals NHS Trust, Brighton, UK and Brighton and Sussex Medical School, Falmer, UK.
Barbara PhilipsBrighton and Sussex Medical School, Falmer, UK and Brighton and Sussex University Hospitals NHS Trust, Brighton, UK.
Alice C EziefulaBrighton and Sussex University Hospitals NHS Trust, Brighton, UK and Brighton and Sussex Medical School, Falmer, UK.
Timothy ChevassutBrighton and Sussex Medical School, Falmer, UK and consultant haematologist, Royal Sussex County Hospital, Brighton, UK t.chevassut@bsms.ac.uk.
Brighton and Sussex Medical School · GBUniversity Hospitals Sussex NHS Foundation Trust · GBRoyal Sussex County Hospital · GBUniversity of Cambridge · GB

Funding

No grant is acknowledged in the PubMed record.

6 · The paper itself

Abstract

backgroundCOVID-19 infection is characterised, among other features, by a prothrombotic state with high rate of venous thromboembolism (VTE), D-dimer, and fibrinogen levels. Clinical observations have also highlighted that these patients have elevated von Willebrand factor (vWF) and factor VIIIc.

methods24 consecutive COVID-19 positive patients were selected from the intensive care unit (ICU) or the high acuity ward of Brighton and Sussex University Hospitals NHS Trust.

resultsThe rate of VTE was 25% and mortality rate was 16.7%. Fibrinogen and D-Dimers were elevated, 7.9 (1.6) g/L and 2.4 (2.02) ug/ml respectively. Factor VIIIc and von vWF antigen levels were both extremely elevated at 279 (148) u/dL and 350 (131) % respectively, which are comparable to levels seen in ICU patients with severe sepsis. vWF levels were significantly higher in patients that died (p=0.017) and showed a positive correlation with age. There was a statistically significant association between COVID-19 disease and non-O blood group (p=0.02); 80% (4/5) of COVID-19 patients with VTE were blood group A.

conclusionVery high levels of vWF and factor VIIIc are common in COVID-19 patients, comparable to levels in severely septic non-COVID ICU patients. This could contribute to the hypercoagulable state and increased VTE rate in COVID-19. Further studies are needed to evaluate the use of vWF for stratifying thrombotic risk in COVID-19 and to determine if elevated vWF is contributing to disease pathogenesis.

Indexed as

BiomarkersCohort StudiesCoronavirus InfectionsCOVID-19Endothelium, VascularFemaleFibrin Fibrinogen Degradation ProductsFibrinogenHospital MortalityHospitals, UniversityHumansIntensive Care UnitsMalePandemicsPneumonia, ViralRisk AssessmentBiomarkersFibrin Fibrinogen Degradation Productsfibrin fragment DFibrinogenvon Willebrand Factorblood groupCOVID-19factor VIIIcvenous thromboembolismvon Willebrand factor

Identifiers

PMID32694169
PMCPMC7539718
OpenAlexW3044071621

What OpenQuestion holds

Textmetadata
Read underepoch 390

Registered trials

None linked

Read under generation 80e0d062 · epoch 390. Bibliography from PubMed, PubMed Central and OpenAlex; grants from NIH RePORTER; trial links from ClinicalTrials.gov; estimates, votes and beliefs from the OpenQuestion graph.