Evidence map›Paper›PMID 36912116›Full record

SynthesisThe British journal of surgery2023

Timing of symptomatic venous thromboembolism after surgery: meta-analysis.

Tino Singh, Lauri I Lavikainen, Alex L E Halme, Riikka Aaltonen, Arnav Agarwal, Marco H Blanker, Kostiantyn Bolsunovskyi, Rufus Cartwright, Herney García-Perdomo, Rachel Gutschon and 7 more

Open access · hybridAbstract readSystematic ReviewMeta-Analysis
In one paragraph

Synthesis in The British journal of surgery, 2023. The graph could read no effect estimate from its abstract, so it casts no vote on the map. Cited by 28 papers, 3 of them syntheses that pooled it.

0numbers the graph read from it
0cells of the map it votes in
28citing papers in PubMed, 3 pooled it
9.1field-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, 3 syntheses or guidelines pooled it, 33 citations in OpenAlex.

  1. Pooled it
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  4. Trial
  5. Article
  6. Article
  7. Short-Term Complications Are Rare After Cholesteatoma Surgery.Clinical otolaryngology : official journal of ENT-UK ; official journal of Netherlands Society for Oto-Rhino-Laryngology & Cervico-Facial Surgery · 2026
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  8. Article
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  11. Review
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  13. Risk for clinical venous thromboembolism and major bleeding after surgery for lumbar spinal stenosis: a retrospective matched register-based cohort study with 462,533 individuals.European spine journal : official publication of the European Spine Society, the European Spinal Deformity Society, and the European Section of the Cervical Spine Research Society · 2026
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  15. Observational
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4 · The record

Corrections and comments

5 · Who and what money

Authors and funding

17 authors at 8 institutions in 6 countries.

Tino SinghFaculty of Medicine, University of Helsinki, Helsinki, Finland.ORCID 0000-0001-5227-7173
Lauri I LavikainenFaculty of Medicine, University of Helsinki, Helsinki, Finland.ORCID 0000-0003-2793-2556
Alex L E HalmeFaculty of Medicine, University of Helsinki, Helsinki, Finland.ORCID 0000-0001-6597-818X
Riikka AaltonenDepartment of Obstetrics and Gynaecology, Turku University Hospital and University of Turku, Turku, Finland.ORCID 0000-0003-4132-3060
Arnav AgarwalDivision of General Internal Medicine, Department of Medicine, McMaster University, Hamilton, Ontario, Canada.ORCID 0000-0002-0931-7851
Marco H BlankerDepartment of General Practice and Elderly Care Medicine, University Medical Centre Groningen, University of Groningen, Groningen, the Netherlands.ORCID 0000-0002-1086-8730
Kostiantyn BolsunovskyiFaculty of Medicine, University of Helsinki, Helsinki, Finland.ORCID 0000-0003-4399-4175
Rufus CartwrightDepartments of Gynaecology and Gender Affirmation Surgery, Chelsea and Westminster NHS Foundation Trust, London, UK.ORCID 0000-0001-5501-319X
Herney García-PerdomoDivision of Urology/Uro-oncology, Department of Surgery, School of Medicine, Universidad del Valle, Cali, Colombia.ORCID 0000-0001-6945-8261
Rachel GutschonDepartment of Health Research Methods, Evidence and Impact, McMaster University, Hamilton, Ontario, Canada.ORCID 0000-0001-7424-8584
Yung LeeDepartment of Surgery, McMaster University, Hamilton, Ontario, Canada.ORCID 0000-0002-6257-4400
Negar PourjamalFaculty of Medicine, University of Helsinki, Helsinki, Finland.ORCID 0000-0002-1430-3075
Robin W M VernooijJulius Centre for Health Sciences and Primary Care, University Medical Centre Utrecht, Utrecht University, Utrecht, the Netherlands.ORCID 0000-0001-5734-4566
Philippe D VioletteDepartment of Health Research Methods, Evidence and Impact, McMaster University, Hamilton, Ontario, Canada.ORCID 0000-0002-6116-5496
Jari HaukkaFaculty of Medicine, University of Helsinki, Helsinki, Finland.ORCID 0000-0003-1450-6208
Gordon H GuyattDepartment of Health Research Methods, Evidence and Impact, McMaster University, Hamilton, Ontario, Canada.ORCID 0000-0003-2352-5718
Kari A O TikkinenFaculty of Medicine, University of Helsinki, Helsinki, Finland.ORCID 0000-0002-1389-8214
University of Helsinki · FIImpact · CAChelsea and Westminster Hospital NHS Foundation Trust · GBMcMaster University · CAUniversidad del Valle · COUniversity Medical Center Groningen · NLUniversity of Turku · FIUtrecht University · NL

Funding

Academy of Finland 309387Competitive Research FundingHelsinki and Uusimaa Hospital TYH2019321Helsinki University Hospital TYH2019321Sigrid Jusélius FoundationTurku University Hospital
6 · The paper itself

Abstract

backgroundThe timing at which venous thromboembolism (VTE) occurs after major surgery has major implications for the optimal duration of thromboprophylaxis. The aim of this study was to perform a systematic review and meta-analysis of the timing of postoperative VTE up to 4 weeks after surgery.

methodsA systematic search of MEDLINE, Scopus, and CINAHL databases was performed between 1 January 2009 and 1 April 2022. Prospective studies that recruited patients who underwent a surgical procedure and reported at least 20 symptomatic, postoperative VTE events by time were included. Two reviewers independently selected studies according to the eligibility criteria, extracted data, and evaluated risk of bias. Data were analysed with a Poisson regression model, and the GRADE approach was used to rate the certainty of evidence.

resultsSome 6258 studies were evaluated, of which 22 (11 general, 5 urological, 4 mixed, and 2 orthopaedic postoperative surgical populations; total 1 864 875 patients and 24 927 VTE events) were eligible. Pooled evidence of moderate certainty showed that 47.1 per cent of the VTE events occurred during the first, 26.9 per cent during the second, 15.8 per cent during the third, and 10.1 per cent during the fourth week after surgery. The timing of VTE was consistent between individual studies.

conclusionAlthough nearly half of symptomatic VTE events in first 4 weeks occur during the first postoperative week, a substantial number of events occur several weeks after surgery. These data will inform clinicians and guideline developers about the duration of postoperative thromboprophylaxis.

Indexed as

Venous ThromboembolismAnticoagulantsHumansProspective StudiesAnticoagulants

Identifiers

PMID36912116
PMCPMC10364527
OpenAlexW4324019798

What OpenQuestion holds

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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.