Evidence map›Paper›PMID 33623884›Full record

ArticleHemaSphere2021

Von Willebrand Factor Multimer Densitometric Analysis: Validation of the Clinical Accuracy and Clinical Implications in Von Willebrand Disease.

Johan Boender, Ferdows Atiq, Marjon H Cnossen, Johanna G van der Bom, Karin Fijnvandraat, Joke de Meris, Moniek P M de Maat, Karin P M van Galen, Britta A P Laros-van Gorkom, Karina Meijer and 2 more

Abstract read
In one paragraph

Article in HemaSphere, 2021. The graph could read no effect estimate from its abstract, so it casts no vote on the map. Cited by 12 papers.

0numbers the graph read from it
0cells of the map it votes in
12citing papers in PubMed
–field-weighted citation impact
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

12 citing papers in PubMed.

  1. Trial
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  6. Article
  7. Silencing of the von Willebrand factor gene in proatherothromboticResearch and practice in thrombosis and haemostasis · 2025
    Article
  8. Article
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  10. Article
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4 · The record

Corrections and comments

PubMed lists nothing against this paper. Absence here is not a guarantee, only a check that was made.

5 · Who and what money

Authors and funding

12 authors.

Johan BoenderDepartment of Hematology, Erasmus MC, University Medical Center Rotterdam, The Netherlands.
Ferdows AtiqDepartment of Hematology, Erasmus MC, University Medical Center Rotterdam, The Netherlands.
Marjon H CnossenDepartment of Pediatric Hematology, Erasmus MC-Sophia Children's Hospital, University Medical Center Rotterdam, The Netherlands.
Johanna G van der BomDepartment of Clinical Epidemiology, Leiden University Medical Center, Leiden, The Netherlands.
Karin FijnvandraatPediatric Hematology, Amsterdam UMC, Emma Children's Hospital, University of Amsterdam, The Netherlands.
Joke de MerisNetherlands Hemophilia Society, Leiden, The Netherlands.
Moniek P M de MaatDepartment of Hematology, Erasmus MC, University Medical Center Rotterdam, The Netherlands.
Karin P M van GalenVan Creveldkliniek, University Medical Center, University Utrecht, The Netherlands.
Britta A P Laros-van GorkomDepartment of Hematology, Radboud University Medical Center, Nijmegen, The Netherlands.
Karina MeijerDepartment of Hematology, University of Groningen, University Medical Center Groningen, The Netherlands.
Jeroen EikenboomDepartment of Internal Medicine, Division of Thrombosis and Hemostasis, Leiden University Medical Center, Leiden, The Netherlands.
Frank W G LeebeekDepartment of Hematology, Erasmus MC, University Medical Center Rotterdam, The Netherlands.

Funding

No grant is acknowledged in the PubMed record.

6 · The paper itself

Abstract

Von Willebrand factor (VWF) multimer analysis is important in the classification of von Willebrand disease (VWD). Current visual VWF multimer analysis is time consuming and inaccurate in detecting subtle changes in multimer patterns. Although VWF multimer densitometric analysis may be useful, the accuracy needs further investigation before it can be widely applied. In this study we aimed to validate VWF multimer densitometric analysis in a large cohort of VWD patients and to identify patient characteristics associated with densitometric outcomes. Patients were included from the Willebrand in the Netherlands (WiN) study, in which a bleeding score (BS) was obtained, and blood was drawn. For multimer analysis, citrated blood was separated on an agarose gel and visualized by Western blotting. IMAGEJ was used to generate densitometric images and medium-large VWF multimer index was calculated. We included 560 VWD patients: 328 type 1, 211 type 2, and 21 type 3 patients. Medium-large VWF multimer index performed excellent in distinguishing visually classified normal VWF multimers from reduced high-molecular-weight (HMW) multimers (area under the curve [AUC]: 0.96 [0.94-0.98],

Identifiers

PMID33623884
PMCPMC7892298

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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.