Evidence map›Paper›PMID 33977212›Full record

ArticleResearch and practice in thrombosis and haemostasis2021

Elevated von Willebrand factor levels during heavy menstrual bleeding episodes limit the diagnostic utility for von Willebrand disease.

Megan C Brown, Michael H White, Rachel Friedberg, Kalinda Woods, Krista Childress, Mona Kulkarni, Robert F Sidonio

Open access · goldAbstract read
In one paragraph

Article in Research and practice in thrombosis and haemostasis, 2021. The graph could read no effect estimate from its abstract, so it casts no vote on the map. Cited by 22 papers, 2 of them syntheses that pooled it.

0numbers the graph read from it
0cells of the map it votes in
22citing papers in PubMed, 2 pooled it
2.9field-weighted citation impact, top 8% 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

22 citing papers in PubMed, 2 syntheses or guidelines pooled it, 32 citations in OpenAlex.

  1. Pooled it
  2. Pooled it
  3. Seventh Åland Island Meeting on von Willebrand Disease.Haemophilia : the official journal of the World Federation of Hemophilia · 2026
    Article
  4. von Willebrand disease: an illustrated review.Research and practice in thrombosis and haemostasis · 2026
    Review
  5. Evaluation of coagulation disorders and iron deficiency in women with heavy menstrual bleeding.International journal of gynaecology and obstetrics: the official organ of the International Federation of Gynaecology and Obstetrics · 2026
    Article
  6. Review
  7. Article
  8. Intraindividual variability of von Willebrand factor and the need for repeated testing.Research and practice in thrombosis and haemostasis · 2025
    Article
  9. von Willebrand disease and heavy menstrual bleeding: when and how to test.Hematology. American Society of Hematology. Education Program · 2024
    Review
  10. Article
  11. von Willebrand disease.Nature reviews. Disease primers · 2024
    Review
  12. Article
  13. Article
  14. Initial von Willebrand factor antigen values in adolescent females predict future values.Haemophilia : the official journal of the World Federation of Hemophilia · 2023
    Article
  15. Article
  16. Laboratory-based inequity in thrombosis and hemostasis: review of the evidence.Research and practice in thrombosis and haemostasis · 2023
    Review
  17. Diagnostic pitfalls and conundrums in type 1 von Willebrand disease.Hematology. American Society of Hematology. Education Program · 2022
    Article
  18. Article
  19. Article
  20. Cryptogenic oozers and bruisers.Hematology. American Society of Hematology. Education Program · 2021
    Article
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

7 authors at 2 institutions in 1 country.

Megan C BrownAflac Cancer and Blood Disorders Center Children's Healthcare of Atlanta Emory University Atlanta GA USA.
Michael H WhiteAflac Cancer and Blood Disorders Center Children's Healthcare of Atlanta Emory University Atlanta GA USA.
Rachel FriedbergChildren's Healthcare of Atlanta Atlanta GA USA.
Kalinda WoodsDepartment of Gynecology and Obstetrics Emory University Atlanta GA USA.
Krista ChildressDivision of Pediatric Surgery Children's Healthcare of Atlanta Atlanta GA USA.
Mona KulkarniChildren's Healthcare of Atlanta Atlanta GA USA.
Robert F SidonioAflac Cancer and Blood Disorders Center Children's Healthcare of Atlanta Emory University Atlanta GA USA.ORCID https://orcid.org/0000-0002-9509-9415
Emory University · USChildren's Healthcare of Atlanta · US

Funding

Implementing a Maternal health and PRegnancy Outcomes Vision for Everyone (IMPROVE)UL1TR002378 · NCATS · EMORY UNIVERSITY · PI Andres J Garcia, Elizabeth O. Ofili · 2017 to 2026
$92.1M
J: NRSA Training CoreTL1TR002382 · NCATS · EMORY UNIVERSITY · PI HENRY M BLUMBERG, Vasiliki Michopoulos · 2017 to 2026
$8.5M
NCATS NIH HHS TL1 TR002382NCATS NIH HHS UL1 TR002378
6 · The paper itself

Abstract

backgroundHeavy menstrual bleeding (HMB) is often the first bleeding symptom for female individuals with inherited bleeding disorders. Guidelines recommend performing the hemostatic evaluation at HMB presentation. Von Willebrand factor (VWF) levels increase with stress, making it unclear if VWF studies during acute bleeding are beneficial in diagnosing von Willebrand disease (VWD).

objectivesTo determine the utility of testing for VWD during acute HMB. PATIENTS/

methodsThis retrospective cohort study evaluated VWF levels of individuals presenting to the emergency department (ED) with HMB from January 1, 2017, to December 31, 2018, after prospective implementation of a clinical practice guideline recommending hemostatic evaluation in the ED. We compared VWF and factor VIII (FVIII) levels between acute presentation and follow-up visit after bleeding resolution. We compared the diagnostic accuracy of initial and follow-up labs.

resultsDuring the study period, 221 individuals were seen in the ED for acute HMB, and 39 had VWD testing at both time points. Median FVIII and VWF levels were higher during acute bleeding than at follow-up. The difference in VWF levels between visits was negligible when initial FVIII value was normal. Overall incidence of VWD was 7.5%; 69% of those with VWD had low VWF levels during acute HMB.

conclusionVWD testing during acute HMB detects the majority of individuals with VWD but also leads to elevated levels of VWF, potentially limiting at the accuracy of diagnostic labs during acute bleeding episodes. Delayed testing until resolution of anemia and active bleeding may provide more accurate diagnostic evaluation for VWD.

Indexed as

adolescentblood coagulation testsfemalehemostaticsmenorrhagiaVon Willebrand diseasevon Willebrand factor

Identifiers

PMID33977212
PMCPMC8105159
OpenAlexW3159550549

What OpenQuestion holds

Textmetadata
LicenceCC BY-NC-ND
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.