Evidence map›Paper›PMID 33759745›Full record

SynthesisDeutsches Arzteblatt international2021

The Risk of Knee Osteoarthritis in Professional Soccer Players—a Systematic Review With Meta-Analyses

Alice Freiberg, Ulrich Bolm-Audorff, Andreas Seidler

Abstract readMeta-AnalysisSystematic Review
In one paragraph

Synthesis in Deutsches Arzteblatt international, 2021. The graph could read no effect estimate from its abstract, so it casts no vote on the map. Cited by 13 papers, 1 of them a synthesis that pooled it.

0numbers the graph read from it
0cells of the map it votes in
13citing papers in PubMed, 1 pooled it
–field-weighted citation impact
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

13 citing papers in PubMed, 1 synthesis or guideline pooled it.

  1. Pooled it
  2. Trial
  3. Article
  4. Article
  5. Anterior cruciate ligament injury incidence in male and female soccer players: A longitudinal study over six consecutive seasons.Knee surgery, sports traumatology, arthroscopy : official journal of the ESSKA · 2025
    Article
  6. Analysis of Genu Varum in Young Male Professional Soccer Players.Orthopaedic journal of sports medicine · 2025
    Article
  7. Article
  8. Article
  9. Article
  10. Observational
  11. Article
  12. Review
  13. Football-related injuries are the major reason for the career end of professional male football players.Knee surgery, sports traumatology, arthroscopy : official journal of the ESSKA · 2021
    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

3 authors.

Alice FreibergInstitute and Policlinic of Occupational and Social Medicine, Medical Faculty Carl Gustav Carus, Technische Universität Dresden; Division of Occupational Health, Department of Occupational Safety and Environment, Regional Government of South Hesse, Wiesbaden; Extraordinary Chair of Occupational Medicine, University of Gießen.
Ulrich Bolm-Audorff
Andreas Seidler

Funding

No grant is acknowledged in the PubMed record.

6 · The paper itself

Abstract

backgroundWe address the question whether professional soccer players with and without macroinjury of the knee joint are at an elevated risk for knee osteoarthritis.

methodsA systematic review with meta-analyses was conducted. The study protocol was prospectively registered (registration number CRD42019137139). The MEDLINE, EMBASE, and Web of Science databases were searched for relevant publications; in addition, forward searching was performed, and the listed references were considered. All steps of the process were undertaken independently by two reviewers, and any discordances were resolved by consensus. For all publications whose full text was included, the methods used were critically evaluated. The quality of the evidence was judged using the GRADE criteria.

resultsThe pooled odds ratio for objectively ascertained osteoarthrosis of the knee was 2.25 (95% confidence interval [1.41-3.61], I

conclusionA marked association was found between soccer playing and knee osteoarthritis in male professional soccer players. For female professional soccer players, the risk of knee osteoarthritis could not be assessed because of the lack of data. Knee injuries seem to play an important role in the development of knee osteoarthritis in professional soccer players.

Indexed as

Knee InjuriesOsteoarthritis, KneeSoccerFemaleHumansKnee JointMale

Identifiers

PMID33759745
PMCPMC8182778

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.