Evidence map›Paper›PMID 31199537›Full record

ArticleBrain pathology (Zurich, Switzerland)2020

Association between contact sports participation and chronic traumatic encephalopathy: a retrospective cohort study.

Kevin F Bieniek, Melissa M Blessing, Michael G Heckman, Nancy N Diehl, Amanda M Serie, Michael A Paolini, Bradley F Boeve, Rodolfo Savica, R Ross Reichard, Dennis W Dickson

Open access · bronzeAbstract read
In one paragraph

Article in Brain pathology (Zurich, Switzerland), 2020. The graph could read no effect estimate from its abstract, so it casts no vote on the map. Cited by 65 papers, 4 of them syntheses that pooled it.

0numbers the graph read from it
0cells of the map it votes in
65citing papers in PubMed, 4 pooled it
8.3field-weighted citation impact, top 2% 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

65 citing papers in PubMed, 4 syntheses or guidelines pooled it, 110 citations in OpenAlex.

  1. Pooled it
  2. A systematic review on the risk of neurodegenerative diseases and neurocognitive disorders in professional and varsity athletes.Neurological sciences : official journal of the Italian Neurological Society and of the Italian Society of Clinical Neurophysiology · 2022
    Pooled it
  3. Pooled it
  4. Pooled it
  5. Comparing perceptions of chronic traumatic encephalopathy (CTE) across health care disciplines.PM & R : the journal of injury, function, and rehabilitation · 2026
    Article
  6. Article
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  9. Article
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  12. CTE neuropathology alone is associated with dementia and cognitive symptoms.Alzheimer's & dementia : the journal of the Alzheimer's Association · 2026
    Article
  13. Article
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  15. Review
  16. CTE-Type Tau Filaments in Alzheimer's Disease with Co-morbid LATE-NC.bioRxiv : the preprint server for biology · 2025
    Article
  17. Article
  18. Article
  19. Review
  20. Article

5 more citing papers are in PubMed but not listed here.

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

10 authors at 3 institutions in 1 country.

Kevin F BieniekDepartment of Neuroscience, Mayo Clinic, Jacksonville, FL.ORCID 0000-0003-4922-864X
Melissa M BlessingDepartment of Laboratory Medicine and Pathology, Mayo Clinic, Rochester, MN.
Michael G HeckmanDivision of Biomedical Statistics and Informatics, Mayo Clinic, Jacksonville, FL.
Nancy N DiehlDivision of Biomedical Statistics and Informatics, Mayo Clinic, Jacksonville, FL.
Amanda M SerieDepartment of Neuroscience, Mayo Clinic, Jacksonville, FL.
Michael A PaoliniDepartment of Laboratory Medicine and Pathology, Mayo Clinic, Rochester, MN.
Bradley F BoeveDepartment of Neurology, Mayo Clinic, Rochester, MN.
Rodolfo SavicaDepartment of Neurology, Mayo Clinic, Rochester, MN.
R Ross ReichardDepartment of Laboratory Medicine and Pathology, Mayo Clinic, Rochester, MN.
Dennis W DicksonDepartment of Neuroscience, Mayo Clinic, Jacksonville, FL.
Mayo Clinic in Arizona · USJacksonville College · USThe University of Texas Health Science Center at San Antonio · US

Funding

Rochester Epidemiology ProjectR01AG034676 · NIA · MAYO CLINIC ROCHESTER · PI ROCCA, WALTER A, ST SAUVER, JENNIFER LYNN · 2010 to 2019
$9.5M
Project 2: Identifying genes and Pathways that impact Tau Toxicity in FTDU54NS100693 · NINDS · MAYO CLINIC JACKSONVILLE · PI PETRUCELLI, LEONARD · 2016 to 2020
$6.2M
The Contribution of Age-Related Taupahtoies to Alzheimer's Disease-SupplementR01AG062348 · NIA · BOSTON UNIVERSITY MEDICAL CAMPUS · PI CRARY, JOHN FONDA, DICKSON, DENNIS WILLIAM · 2018 to 2022
$4.5M
The Contribution of Age-Related Tauopathies to Alzheimer's DiseaseRF1AG062348 · NIA · BOSTON UNIVERSITY MEDICAL CAMPUS · PI John Fonda Crary, DENNIS WILLIAM DICKSON · 2023 to 2026
$4.0M
Interdisciplinary Infrastructure for Aging Research: Rochester Epidemiology ProjectR33AG058738 · NIA · MAYO CLINIC ROCHESTER · PI LEBRASSEUR, NATHAN K, OLSON, JANET E · 2020 to 2022
$2.4M
NIA NIH HHS R01 AG034676NIA NIH HHS R01 AG062348NIA NIH HHS R33 AG058738NIA NIH HHS RF1 AG062348NINDS NIH HHS U54 NS100693
6 · The paper itself

Abstract

Chronic traumatic encephalopathy is a debilitating neurodegenerative disorder associated with repetitive traumatic brain injuries often sustained through prior contact sport participation. The frequency of this disorder in a diverse population, including amateur athletes, is unknown. Primary historical obituary and yearbook records were queried for 2566 autopsy cases in the Mayo Clinic Tissue Registry resulting in identification of 300 former athletes and 450 non-athletes. In these cases, neocortical tissue was screened for tau pathology with immunohistochemistry, including pathology consistent with chronic traumatic encephalopathy, blinded to exposure or demographic information. Using research infrastructure of the Rochester Epidemiology Project, a comprehensive and established medical records-linkage system of care providers in southern Minnesota and western Wisconsin, medical diagnostic billing codes pertaining to head trauma, dementia, movement disorders, substance abuse disorders and psychiatric disorders were recorded for cases and controls in a blinded manner. A total of 42 individuals had pathology consistent with, or features of, chronic traumatic encephalopathy. It was more frequent in athletes compared to non-athletes (27 cases versus 15 cases) and was largely observed in men (except for one woman). For contact sports, American football had the highest frequency of chronic traumatic encephalopathy pathology (15% of cases) and an odds ratio of 2.62 (P-value = 0.005). Cases with chronic traumatic encephalopathy pathology had higher frequencies of antemortem clinical features of dementia, psychosis, movement disorders and alcohol abuse compared to cases without chronic traumatic encephalopathy pathology. Understanding the frequency of chronic traumatic encephalopathy pathology in a large autopsy cohort with diverse exposure backgrounds provides a baseline for future prospective studies assessing the epidemiology and public health impact of chronic traumatic encephalopathy and sports-related repetitive head trauma.

Indexed as

AdolescentAdultAgedAthletesAthletic InjuriesBrainBrain Injuries, TraumaticChildChronic Traumatic EncephalopathyCohort StudiesDementiaFemaleHumansMaleMiddle AgedNeurodegenerative Diseasestau Proteinschronic traumatic encephalopathycontact sportsfootballtautraumatic brain injuries

Identifiers

PMID31199537
PMCPMC6916416
OpenAlexW2949927692

What OpenQuestion holds

Textmetadata
LicenceCC BY-NC-ND
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.