Evidence map›Paper›PMID 35398975›Full record

ArticleJournal of thrombosis and haemostasis : JTH2022

Risk of venous thromboembolism after COVID-19 vaccination.

Damon E Houghton, Waldemar Wysokinski, Ana I Casanegra, Leslie J Padrnos, Surbhi Shah, Ewa Wysokinska, Rajiv Pruthi, Aneel Ashrani, Meera Sridharan, Lisa Baumann-Kreuziger and 2 more

Open access · bronzeAbstract read
In one paragraph

Article in Journal of thrombosis and haemostasis : JTH, 2022. The graph could read no effect estimate from its abstract, so it casts no vote on the map. Cited by 28 papers, 1 of them a synthesis that pooled it.

0numbers the graph read from it
0cells of the map it votes in
28citing papers in PubMed, 1 pooled it
9.6field-weighted citation impact, top 1% 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

28 citing papers in PubMed, 1 synthesis or guideline pooled it, 44 citations in OpenAlex.

  1. Pooled it
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  15. COVID-19: a vascular nightmare unfolding.Frontiers in immunology · 2025
    Review
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  17. Review
  18. Comparison of Venous Thromboembolism Outcomes after COVID-19 and Influenza Vaccinations.TH open : companion journal to thrombosis and haemostasis · 2023
    Article
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  20. Review
4 · The record

Corrections and comments

5 · Who and what money

Authors and funding

12 authors at 4 institutions in 1 country.

Damon E HoughtonDivision of Vascular Medicine, Department of Cardiovascular Diseases, Mayo Clinic, Rochester, Minnesota, USA.ORCID 0000-0002-6065-9523
Waldemar WysokinskiDivision of Vascular Medicine, Department of Cardiovascular Diseases, Mayo Clinic, Rochester, Minnesota, USA.ORCID 0000-0002-8119-6206
Ana I CasanegraDivision of Vascular Medicine, Department of Cardiovascular Diseases, Mayo Clinic, Rochester, Minnesota, USA.ORCID 0000-0001-6114-4284
Leslie J PadrnosDivision of Hematology/Oncology, Department of Internal Medicine, Mayo Clinic, Scottsdale, Arizona, USA.ORCID 0000-0002-1788-4944
Surbhi ShahDivision of Hematology/Oncology, Department of Internal Medicine, Mayo Clinic, Scottsdale, Arizona, USA.ORCID 0000-0003-0978-5687
Ewa WysokinskaDivision of Hematology/Oncology, Department of Internal Medicine, Mayo Clinic, Jacksonville, Florida, USA.ORCID 0000-0003-4351-8734
Rajiv PruthiDivision of Hematology, Department of Internal Medicine, Mayo Clinic, Rochester, Minnesota, USA.ORCID 0000-0002-6969-929X
Aneel AshraniDivision of Hematology, Department of Internal Medicine, Mayo Clinic, Rochester, Minnesota, USA.ORCID 0000-0002-6126-2528
Meera SridharanDivision of Hematology, Department of Internal Medicine, Mayo Clinic, Rochester, Minnesota, USA.ORCID 0000-0001-7225-8228
Lisa Baumann-KreuzigerDivision of Hematology/Oncology, Department of Internal Medicine, Versiti, Milwaukee, Wisconsin, USA.ORCID 0000-0002-1171-0548
Robert McBaneDivision of Vascular Medicine, Department of Cardiovascular Diseases, Mayo Clinic, Rochester, Minnesota, USA.ORCID 0000-0001-8727-8029
Anand PadmanabhanDivisions of Hematopathology, Transfusion Medicine & Experimental Pathology, Department of Laboratory Medicine and Pathology, Mayo Clinic, Rochester, Minnesota, USA.ORCID 0000-0003-2519-4377
Mayo Clinic · USMayo Clinic in Arizona · USMayo Clinic in Florida · USVersiti Blood Center of Wisconsin · US

Funding

No grant is acknowledged in the PubMed record.

6 · The paper itself

Abstract

backgroundCOVID-19 vaccinations in the United States are effective in preventing illness and hospitalization yet concern over post-vaccination venous thromboembolism (VTE) risk has led to vaccine hesitancy.

methodsThe aim of this study was to compare VTE rates before and after COVID-19 vaccination. COVID-19 vaccinated patients ≥18 years between November 1, 2020 through November 1, 2021 were analyzed using electronic medical records across the Mayo Clinic enterprise. The primary outcome was imaging confirmed acute VTE (upper or lower deep vein thrombosis or pulmonary embolism) occurring 90 days before and after the date of first vaccine dose.

resultsA total of 792 010 patients with at least one COVID-19 vaccination were identified (Pfizer, n = 452 950, Moderna, n = 290 607, and Janssen [Johnson & Johnson], n = 48 453). A total of 1565 VTE events occurred in the 90 days before (n = 772) and after (n = 793) COVID-19 vaccination. VTE post-vaccination occurred in 326 patients receiving Moderna (0.11%, incidence rate [IR] 4.58 per 1000p-years), 425 patients receiving Pfizer (0.09%, IR 3.84 per 1000p-years), and 42 receiving Janssen (0.09%, IR 3.56 per 1000p-years). Compared to the pre-vaccination timeframe, the adjusted hazard ratio (aHR) for VTE after the Janssen vaccination was 0.97 (95% confidence interval [CI] 0.63-1.50), aHR 1.02 (95% CI 0.87-1.19) for Moderna, and aHR 1.00 (95% CI 0.87-1.15) for Pfizer.

conclusionIn this large cohort of COVID-19 vaccinated patients, no increased risk for acute VTE post-vaccination was identified for the authorized vaccines in the United States.

Indexed as

COVID-19Venous ThromboembolismVenous ThrombosisCOVID-19 VaccinesHumansVaccinationCOVID-19 VaccinesCOVID-19deep vein thrombosisimmunizationpulmonary embolismSARS-CoV-2vaccinationvenous thromboembolism

Identifiers

PMID35398975
PMCPMC9115120
OpenAlexW4223419554

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.