Evidence map›Paper›PMID 26917779›Full record

Trial reportBlood2016

Rapid discrimination of the phenotypic variants of von Willebrand disease.

Jonathan C Roberts, Patti A Morateck, Pamela A Christopherson, Ke Yan, Raymond G Hoffmann, Joan Cox Gill, Robert R Montgomery, Zimmerman Program Investigators

Registry-linked trialOpen access · bronzeAbstract readClinical TrialComparative StudyMulticenter Study
In one paragraph

Trial report in Blood, 2016. The graph could read no effect estimate from its abstract, so it casts no vote on the map. It is linked to trial NCT05500807 (Emicizumab for Severe VON Willebrand Disease), which is not on this map. Cited by 8 papers.

0numbers the graph read from it
0cells of the map it votes in
8citing papers in PubMed
1.8field-weighted citation impact, top 14% 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.

NCT05500807 phase1recruitingnot on this mapstarted 2022, after this paper: background citation

Emicizumab for Severe VON Willebrand Disease (VWD) and VWD/Hemophilia A

TypeinterventionalSponsorBleeding and Clotting Disorders Institute Peoria, IllinoisRan2022 to 2028Enrolled40ConditionsVon Willebrand Disease, Type 3, Concomitant VWD and HemophiliaArmsEmicizumab
3 · Its place in the literature

Who cites it

8 citing papers in PubMed, 22 citations in OpenAlex.

  1. Article
  2. von Willebrand disease.Nature reviews. Disease primers · 2024
    Review
  3. Article
  4. Review
  5. Sixth Åland Island Conference on von Willebrand disease.Haemophilia : the official journal of the World Federation of Hemophilia · 2022
    Article
  6. Article
  7. Article
  8. What have we learned from large population studies of von Willebrand disease?Hematology. American Society of Hematology. Education Program · 2016
    Review
4 · The record

Corrections and comments

5 · Who and what money

Authors and funding

8 authors at 1 institution in 1 country.

Jonathan C RobertsBlood Research Institute, BloodCenter of Wisconsin and Medical College of Wisconsin, Milwaukee, WI; and Bleeding & Clotting Disorders Institute, Peoria, IL.ORCID 0000-0002-9415-9543
Patti A MorateckBlood Research Institute, BloodCenter of Wisconsin and Medical College of Wisconsin, Milwaukee, WI; and.
Pamela A ChristophersonBlood Research Institute, BloodCenter of Wisconsin and Medical College of Wisconsin, Milwaukee, WI; and.
Ke YanBlood Research Institute, BloodCenter of Wisconsin and Medical College of Wisconsin, Milwaukee, WI; and.
Raymond G HoffmannBlood Research Institute, BloodCenter of Wisconsin and Medical College of Wisconsin, Milwaukee, WI; and.
Joan Cox GillBlood Research Institute, BloodCenter of Wisconsin and Medical College of Wisconsin, Milwaukee, WI; and.
Robert R MontgomeryBlood Research Institute, BloodCenter of Wisconsin and Medical College of Wisconsin, Milwaukee, WI; and.
Zimmerman Program Investigators
Medical College of Wisconsin · US

Funding

Zimmerman Program for the Molecular and Clinical Biology of VWDP01HL081588 · NHLBI · VERSITI WISCONSIN, INC. · PI MONTGOMERY, ROBERT R · 2005 to 2016
$19.3M
Comparative Effectiveness in the Diagnosis of VWDR01HL112614 · NHLBI · VERSITI WISCONSIN, INC. · PI ABSHIRE, THOMAS CALVIN, MONTGOMERY, ROBERT R · 2013 to 2018
$4.1M
Expansion and validation of a colon cancer incidence model in men and womenR21CA158808 · NCI · CALIFORNIA PACIFIC MED CTR RES INSTITUTE · PI WEI, ESTHER K · 2012 to 2013
$371k
NCI NIH HHS R21 CA158808NHLBI NIH HHS P01 HL081588NHLBI NIH HHS R01 HL112614
6 · The paper itself

Abstract

Approximately 20% to 25% of patients with von Willebrand disease (VWD) have a qualitative defect of the von Willebrand factor (VWF) protein activities. Variant VWD typically is classified as type 1C, 2A, 2B, 2M, or 2N depending on the VWF activity defect. Traditionally, diagnosis has relied on multiple clinical laboratory assays to assign VWD phenotype. We developed an enzyme-linked immunosorbent assay (ELISA) to measure the various activities of VWF on a single plate and evaluated 160 patient samples enrolled in the Zimmerman Program for the Molecular and Clinical Biology of von Willebrand Disease with type 2 VWD. Using linear discriminate analysis (LDA), this assay was able to identify type 1C, 2A, 2B, 2M, or 2N VWD with an overall accuracy of 92.5% in the patient study cohort. LDA jackknife analysis, a statistical resampling technique, identified variant VWD with an overall accuracy of 88.1%, which predicts the assay's performance in the general population. In addition, this assay demonstrated correlation with traditional clinical laboratory VWF assays. The VWF multiplex activity assay may be useful as a same-day screening assay when considering the diagnosis of variant VWD in an individual patient.

Indexed as

Data AccuracyDiscriminant AnalysisEnzyme-Linked Immunosorbent AssayGenetic TestingGenotypeHemophilia AHumansPhenotypeProbabilityReproducibility of ResultsROC CurveSensitivity and SpecificityTime Factorsvon Willebrand Diseasesvon Willebrand FactorVon Willebrand antigenvon Willebrand Factor

Identifiers

PMID26917779
PMCPMC4874227
OpenAlexW2285392866

What OpenQuestion holds

Textmetadata
Read underepoch 390

Registered trials

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.