Evidence map›Paper›PMID 34710097›Full record

ArticlePloS one2021

Impact of persistent D-dimer elevation following recovery from COVID-19.

Antje Lehmann, Helmut Prosch, Sonja Zehetmayer, Maximilian Robert Gysan, Dominik Bernitzky, Karin Vonbank, Marco Idzko, Daniela Gompelmann

Open access · goldAbstract readMulticenter Study
In one paragraph

Article in PloS one, 2021. The graph could read no effect estimate from its abstract, so it casts no vote on the map. Cited by 41 papers, 2 of them syntheses that pooled it.

0numbers the graph read from it
0cells of the map it votes in
41citing papers in PubMed, 2 pooled it
4.3field-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

41 citing papers in PubMed, 2 syntheses or guidelines pooled it, 76 citations in OpenAlex.

  1. SPECT/CT Scan Images to Evaluate COVID-19 Pulmonary Complications: A Systematic Review.International journal of environmental research and public health · 2025
    Pooled it
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  3. Trial
  4. Impact of nutrition on long COVID.Sports medicine and health science · 2026
    Review
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  9. Review
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  13. Cardiopulmonary Complications after Pulmonary Embolism in COVID-19.International journal of molecular sciences · 2024
    Article
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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

8 authors at 1 institution in 1 country.

Antje LehmannDepartment of Medicine II, Division of Pulmonology, Medical University of Vienna, Vienna, Austria.ORCID 0000-0002-0686-2811
Helmut ProschDepartment of Biomedical Imaging and Image-guided Therapy, Medical University of Vienna, Vienna, Austria.
Sonja ZehetmayerCenter for Medical Statistics, Informatics, and Intelligent Systems, Medical University of Vienna, Vienna, Austria.
Maximilian Robert GysanDepartment of Medicine II, Division of Pulmonology, Medical University of Vienna, Vienna, Austria.
Dominik BernitzkyDepartment of Medicine II, Division of Pulmonology, Medical University of Vienna, Vienna, Austria.
Karin VonbankDepartment of Medicine II, Division of Pulmonology, Medical University of Vienna, Vienna, Austria.
Marco IdzkoDepartment of Medicine II, Division of Pulmonology, Medical University of Vienna, Vienna, Austria.
Daniela GompelmannDepartment of Medicine II, Division of Pulmonology, Medical University of Vienna, Vienna, Austria.
Medical University of Vienna · AT

Funding

No grant is acknowledged in the PubMed record.

6 · The paper itself

Abstract

backgroundElevated D-dimer is known as predictor for severity of SARS-CoV2-infection. Increased D-dimer is associated with thromboembolic complications, but it is also a direct consequence of the acute lung injury seen in COVID-19 pneumonia.

objectivesTo evaluate the rate of persistent elevated D-dimer and its association with thromboembolic complications and persistent ground glass opacities (GGO) after recovery from COVID-19.

methodsIn this post hoc analysis of a prospective multicenter trial, patients underwent blood sampling, measurement of diffusion capacity, blood gas analysis, and multidetector computed tomography (MDCT) scan following COVID-19. In case of increased D-dimer (>0,5 μg/ml), an additional contrast medium-enhanced CT was performed in absence of contraindications. Results were compared between patients with persistent D-dimer elevation and patients with normal D-dimer level.

results129 patients (median age 48.8 years; range 19-91 years) underwent D-Dimer assessment after a median (IQR) of 94 days (64-130) following COVID-19. D-dimer elevation was found in 15% (19/129) and was significantly more common in patients who had experienced a severe SARS-CoV2 infection that had required hospitalisation compared to patients with mild disease (p = 0.049). Contrast-medium CT (n = 15) revealed an acute pulmonary embolism in one patient and CTEPH in another patient. A significant lower mean pO2 (p = 0.015) and AaDO2 (p = 0.043) were observed in patients with persistent D-Dimer elevation, but the rate of GGO were similar in both patient groups (p = 0.33).

conclusionIn 15% of the patients recovered from COVID-19, persistent D-dimer elevation was observed after a median of 3 months following COVID-19. These patients had experienced a more severe COVID and still presented more frequently a lower mean pO2 and AaDO2.

Indexed as

AdultAgedAged, 80 and overBiomarkersCOVID-19FemaleFibrin Fibrinogen Degradation ProductsHumansMaleMiddle AgedProspective StudiesPulmonary EmbolismRetrospective StudiesRNA, ViralSARS-CoV-2Severity of Illness IndexBiomarkersFibrin Fibrinogen Degradation Productsfibrin fragment DRNA, Viral

Identifiers

PMID34710097
PMCPMC8553152
OpenAlexW3208919661

What OpenQuestion holds

Textmetadata
LicenceCC BY
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.