Evidence map›Paper›PMID 33053206›Full record

SynthesisEuropean journal of clinical investigation2021

High rates of pulmonary artery occlusions in COVID-19. A meta-analysis.

Simone Birocchi, Marco Manzoni, Gian Marco Podda, Giovanni Casazza, Marco Cattaneo

Open access · bronzeAbstract readMeta-Analysis
In one paragraph

Synthesis in European journal of clinical investigation, 2021. The graph could read no effect estimate from its abstract, so it casts no vote on the map. Cited by 17 papers, 1 of them a synthesis that pooled it.

0numbers the graph read from it
0cells of the map it votes in
17citing papers in PubMed, 1 pooled it
3.5field-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

17 citing papers in PubMed, 1 synthesis or guideline pooled it, 34 citations in OpenAlex.

  1. High rates of pulmonary artery occlusions in COVID-19. A meta-analysis.European journal of clinical investigation · 2021
    Pooled it
  2. Observational
  3. Review
  4. Article
  5. Article
  6. Review
  7. Review
  8. Review
  9. Review
  10. Review
  11. Article
  12. A hitchhiker's guide through the COVID-19 galaxy.Clinical immunology (Orlando, Fla.) · 2021
    Review
  13. Review
  14. Article
  15. Observational
  16. Similarities and perspectives on the two C's-Cancer and COVID-19.Journal of thrombosis and haemostasis : JTH · 2021
    Article
  17. 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

5 authors at 1 institution in 1 country.

Simone BirocchiUnità di Medicina II, ASST Santi Paolo e Carlo - Dipartimento di Scienze della Salute, Università degli Studi di Milano, Milano, Italy.
Marco ManzoniUnità di Medicina II, ASST Santi Paolo e Carlo - Dipartimento di Scienze della Salute, Università degli Studi di Milano, Milano, Italy.
Gian Marco PoddaUnità di Medicina II, ASST Santi Paolo e Carlo - Dipartimento di Scienze della Salute, Università degli Studi di Milano, Milano, Italy.
Giovanni CasazzaDipartimento di Scienze Biomediche e Cliniche L. Sacco, Università degli Studi di Milano, Milano, Italy.
Marco CattaneoUnità di Medicina II, ASST Santi Paolo e Carlo - Dipartimento di Scienze della Salute, Università degli Studi di Milano, Milano, Italy.ORCID https://orcid.org/0000-0002-7343-4534
University of Milan · IT

Funding

No grant is acknowledged in the PubMed record.

6 · The paper itself

Abstract

backgroundCOVID-19 patients are considered at high risk of venous thromboembolism (VTE). The real nature of pulmonary artery occlusions (PAO) in COVID-19 has been questioned, suggesting that it is caused also by in situ thrombi, rather than only by emboli (PE) from peripheral thrombi.

methodsWe searched MEDLINE for studies published until 6 June 2020 that included COVID-19 patients or non-COVID-19 medical patients at VTE risk, treated with heparins, in whom VTE (PE and deep vein thrombosis, DVT) had been reported. Systematic review and results reporting were conducted in accordance with PRISMA guidelines. Data were independently extracted by two observers, and estimates were pooled using random-effects meta-analysis.

resultsWe identified 17 studies including 3224 COVID-19 patients and 7 including 11 985 non-COVID-19 patients. Two analyses were performed: in all COVID-19 patients and only in those (n = 515) who, like non-COVID-19 patients, were screened systematically for DVT. The latter analysis revealed that the prevalence of DVT was 15.43% (95%CI, 4.08-31.77) in COVID-19 and 4.21% (2.27-6.68) in non-COVID-19 patients (P = .0482). The prevalence of PE was 4.85% (40.33-13.01) in COVID-19 patients and 0.22% (0.03-0.55) in non-COVID-19 patients (P = .0128). The percentage of PE among VTE events was 22.15% (5.31-44.60) in COVID-19 and 6.39% (3.17-10.41) in non-COVID-19 patients (P = .0482). Differences were even more marked when all COVID-19 patients were analysed.

conclusionsThe results of our meta-analysis highlight a disproportion in the prevalence of PE among all VTE events in COVID 19 patients, likely reflecting PAO by pulmonary thrombi, rather than emboli from peripheral vein thrombi.

Indexed as

Pulmonary ArteryAnticoagulantsCase-Control StudiesCOVID-19HeparinHeparin, Low-Molecular-WeightHumansPrevalencePulmonary EmbolismSARS-CoV-2ThrombosisVenous ThrombosisAnticoagulantsHeparinHeparin, Low-Molecular-WeightCOVID-19embolism and thrombosislow-molecular-weight heparinSARS coronavirus

Identifiers

PMID33053206
PMCPMC7646003
OpenAlexW3092936271

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.