Evidence map›Paper›PMID 36195436›Full record

ArticleJournal of neurology, neurosurgery, and psychiatry2022

Neurodegenerative disease risk among former international rugby union players.

Emma R Russell, Daniel F Mackay, Donald Lyall, Katy Stewart, John A MacLean, James Robson, Jill P Pell, William Stewart

Open access · hybridAbstract read
In one paragraph

Article in Journal of neurology, neurosurgery, and psychiatry, 2022. The graph could read no effect estimate from its abstract, so it casts no vote on the map. Cited by 55 papers, 2 of them syntheses that pooled it.

0numbers the graph read from it
0cells of the map it votes in
55citing papers in PubMed, 2 pooled it
12.2field-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

55 citing papers in PubMed, 2 syntheses or guidelines pooled it, 83 citations in OpenAlex.

  1. Pooled it
  2. Pooled it
  3. Neurophysiological Effects of Repeated Soccer Heading in Youth.Journal of biomechanical engineering · 2023
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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 2 institutions in 1 country.

Emma R RussellSchool of Psychology and Neuroscience, University of Glasgow, Glasgow, UK.
Daniel F MackayInstitute of Health and Wellbeing, University of Glasgow, Glasgow, UK.
Donald LyallInstitute of Health and Wellbeing, University of Glasgow, Glasgow, UK.ORCID 0000-0003-3850-1487
Katy StewartHampden Sports Clinic, Glasgow, UK.
John A MacLeanHampden Sports Clinic, Glasgow, UK.
James RobsonScottish Rugby, Edinburgh, UK.
Jill P PellInstitute of Health and Wellbeing, University of Glasgow, Glasgow, UK.
William StewartSchool of Psychology and Neuroscience, University of Glasgow, Glasgow, UK william.stewart@glasgow.ac.uk.ORCID 0000-0003-2199-2582
University of Glasgow · GBQueen Elizabeth University Hospital · GB

Funding

Data Coordinating CoreU54NS115322 · NINDS · UNIVERSITY OF PENNSYLVANIA · PI SMITH, DOUGLAS HAMILTON · 2019 to 2023
$9.2M
NINDS NIH HHS U54 NS115322
6 · The paper itself

Abstract

backgroundAutopsy studies of former contact sports athletes, including soccer and rugby players, frequently report chronic traumatic encephalopathy, a neurodegenerative pathology associated with traumatic brain injury. Nevertheless, little is known about the risk of neurodegenerative disease in these populations. We hypothesised that neurodegenerative disease risk would be higher among former elite rugby union players than the general population.

methodsWe conducted a retrospective cohort study accessing national electronic records on death certification, hospital admissions and dispensed prescriptions for a cohort of 412 male Scottish former international rugby union players and 1236 members of the general population, matched to former players by age, sex and area socioeconomic status. Mortality and incident neurodegenerative disease diagnoses among former rugby players were then compared with the matched comparison group.

resultsOver a median 32 years follow-up from study entry at age 30 years, 121 (29.4%) former rugby players and 381 (30.8%) of the matched comparison group died. All-cause mortality was lower among former rugby players until 70 years of age with no difference thereafter. During follow-up, 47 (11.4%) former rugby players and 67 (5.4%) of the comparison group were diagnosed with incident neurodegenerative disease (HR 2.67, 95% CI 1.67 to 4.27, p<0.001).

conclusionsThis study adds to our understanding of the association between contact sports participation and the risk of neurodegenerative disease. While further research exploring this interaction is required, in the meantime strategies to reduce exposure to head impacts and head injuries in sport should be promoted.

Indexed as

Athletic InjuriesBrain ConcussionFootballNeurodegenerative DiseasesAdultHumansMaleRetrospective StudiesRugbyCONCUSSIONDEMENTIAMOTOR NEURON DISEASETRAUMATIC BRAIN INJURY

Identifiers

PMID36195436
PMCPMC9669247
OpenAlexW4301370254

What OpenQuestion holds

Textmetadata
LicenceCC BY-NC
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.