Evidence map›Paper›PMID 33608914›Full record

Observational studyEuropean journal of haematology2021

Long-term follow-up of patients with venous thromboembolism and COVID-19: Analysis of risk factors for death and major bleeding.

Pablo Demelo-Rodríguez, Lucía Ordieres-Ortega, Zichen Ji, Jorge Del Toro-Cervera, Javier de Miguel-Díez, Luis A Álvarez-Sala-Walther, Francisco Galeano-Valle

Open access · bronzeAbstract readObservational Study
In one paragraph

Observational study in European journal of haematology, 2021. The graph could read no effect estimate from its abstract, so it casts no vote on the map. Cited by 21 papers, 1 of them a synthesis that pooled it.

0numbers the graph read from it
0cells of the map it votes in
21citing papers in PubMed, 1 pooled it
4.9field-weighted citation impact, top 4% 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

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

  1. Pooled it
  2. Impact of COVID-19 in the incidence of venous thromboembolism (VTE) and clinical outcomes in cancer patients: a cohort study.Clinical & translational oncology : official publication of the Federation of Spanish Oncology Societies and of the National Cancer Institute of Mexico · 2025
    Article
  3. COVID-19 and Recurrent Venous Thromboembolism (CORE-VTE).The Canadian journal of hospital pharmacy · 2025
    Article
  4. Article
  5. Article
  6. Article
  7. Observational
  8. Article
  9. Article
  10. Thromboembolism in the Complications of Long COVID-19.Cardiology and cardiovascular medicine · 2023
    Article
  11. Article
  12. Review
  13. Article
  14. Article
  15. Major coagulation disorders and parameters in COVID-19 patients.European journal of medical research · 2022
    Review
  16. Review
  17. Review
  18. Review
  19. Article
  20. Observational
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 1 institution in 1 country.

Pablo Demelo-RodríguezVenous Thromboembolism Unit, Internal Medicine, Hospital General Universitario Gregorio Marañon, Madrid, Spain.ORCID https://orcid.org/0000-0002-3096-4711
Lucía Ordieres-OrtegaVenous Thromboembolism Unit, Internal Medicine, Hospital General Universitario Gregorio Marañon, Madrid, Spain.
Zichen JiDepartment of Medicine, School of Medicine, Universidad Complutense de Madrid, Madrid, Spain.
Jorge Del Toro-CerveraVenous Thromboembolism Unit, Internal Medicine, Hospital General Universitario Gregorio Marañon, Madrid, Spain.
Javier de Miguel-DíezDepartment of Medicine, School of Medicine, Universidad Complutense de Madrid, Madrid, Spain.
Luis A Álvarez-Sala-WaltherDepartment of Medicine, School of Medicine, Universidad Complutense de Madrid, Madrid, Spain.
Francisco Galeano-ValleVenous Thromboembolism Unit, Internal Medicine, Hospital General Universitario Gregorio Marañon, Madrid, Spain.ORCID https://orcid.org/0000-0003-1321-6866
Universidad Complutense de Madrid · ES

Funding

No grant is acknowledged in the PubMed record.

6 · The paper itself

Abstract

introductionCOVID-19 predisposes patients to a higher risk of venous thromboembolism (VTE), although the extent of these implications is unclear and the risk of bleeding has been poorly evaluated. To date, no studies have reported long-term outcomes of patients with COVID-19 and VTE.

methodProspective observational study to evaluate long-term (90 days or more) outcomes of patients diagnosed with VTE (PE, DVT of the extremities, or both) in the setting of COVID-19. The main outcome of the study was a compound of major bleeding and death.

resultsThe study comprised 100 patients (mean age 65 ± 13.9 years). At the time of VTE diagnosis, 66% patients were hospitalized, 34.8% of them in the ICU. Mean follow-up was 97.9 ± 23.3 days. During the study period, 24% patients died and median time to death was 12 (IQR: 2.25-20.75) days, 11% patients had major bleeding and median time to event was 12 (IQR: 5-16) days. The cause of death was PE in 5% and bleeding in 2% of patients. There were no VTE recurrences. The main study outcome occurred in 29% patients. Risk of death or major bleeding was independently associated with ICU admission (HR 12.2; 95% CI 3.0-48.3), thrombocytopenia (HR 4.5; 95% CI 1.2-16.5), and cancer (HR 21.6; 95% CI 1.8-259).

conclusionIn patients with COVID-19 and VTE, mortality and major bleeding were high and almost a third of deaths were VTE-related. The majority of complications occurred in the first 30 days. ICU admission, thrombocytopenia, and cancer are risk factors for poor prognosis.

Indexed as

SARS-CoV-2AgedCOVID-19FemaleFollow-Up StudiesHemorrhageHumansMaleMiddle AgedPandemicsProspective StudiesPulmonary EmbolismRisk FactorsSpainTime FactorsVenous ThromboembolismanticoagulationbleedingCOVID-19SARS-COV-2venous thromboembolism

Identifiers

PMID33608914
PMCPMC8013455
OpenAlexW3130601072

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.