Evidence map›Paper›PMID 34839696›Full record

ArticleStroke2022

Cumulative Concussion and Odds of Stroke in Former National Football League Players.

Benjamin L Brett, Zachary Y Kerr, Neelum T Aggarwal, Avinash Chandran, Rebekah Mannix, Samuel Walton, J D DeFreese, Ruben J Echemendia, Kevin M Guskiewicz, Michael A McCrea and 1 more

Open access · greenAbstract read
In one paragraph

Article in Stroke, 2022. The graph could read no effect estimate from its abstract, so it casts no vote on the map. Cited by 9 papers.

0numbers the graph read from it
0cells of the map it votes in
9citing papers in PubMed
1.4field-weighted citation impact, top 19% 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

9 citing papers in PubMed, 13 citations in OpenAlex.

  1. Article
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  7. Innate immunity changes in soccer players after whole-body cryotherapy.BMC sports science, medicine & rehabilitation · 2022
    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

11 authors at 4 institutions in 1 country.

Benjamin L Brett *Department of Neurosurgery, Medical College of Wisconsin, Wauwatosa (B.L.B., M.A.M.).ORCID 0000-0003-2849-4658
Zachary Y Kerr *Department of Exercise and Sport Science, University of North Carolina at Chapel Hill (Z.Y.K., A.C., S.W., J.D.D., K.M.G.).ORCID 0000-0003-1423-1259
Neelum T AggarwalRush Alzheimer's Disease Center, Chicago, IL (N.T.A.).
Avinash ChandranDepartment of Exercise and Sport Science, University of North Carolina at Chapel Hill (Z.Y.K., A.C., S.W., J.D.D., K.M.G.).ORCID 0000-0002-2949-3668
Rebekah MannixBoston Children's Hospital, MA (R.M., W.P.M.).
Samuel WaltonDepartment of Exercise and Sport Science, University of North Carolina at Chapel Hill (Z.Y.K., A.C., S.W., J.D.D., K.M.G.).ORCID 0000-0003-2647-5701
J D DeFreeseDepartment of Exercise and Sport Science, University of North Carolina at Chapel Hill (Z.Y.K., A.C., S.W., J.D.D., K.M.G.).ORCID 0000-0003-3233-0699
Ruben J EchemendiaPsychological and Neurobehavioral Associates, Inc, State College, PA (R.J.E.).ORCID 0000-0001-6116-8462
Kevin M GuskiewiczDepartment of Exercise and Sport Science, University of North Carolina at Chapel Hill (Z.Y.K., A.C., S.W., J.D.D., K.M.G.).ORCID 0000-0002-8682-2130
Michael A McCreaDepartment of Neurosurgery, Medical College of Wisconsin, Wauwatosa (B.L.B., M.A.M.).
William P MeehanBoston Children's Hospital, MA (R.M., W.P.M.).
University of North Carolina at Chapel Hill · USBoston Children's Hospital · USMedical College of Wisconsin · USAlzheimer’s Disease Neuroimaging Initiative · US

Funding

Genetic Analysis and Manipulation Core (GAEC)P50HD105351 · NICHD · BOSTON CHILDREN'S HOSPITAL · PI SCOTT Loren POMEROY, MUSTAFA SAHIN · 2021 to 2026
$9.4M
The effects of cumulative concussion, repetitive head impacts, and comorbid cardiovascular risk factors on MRI metrics of pathological aging and neurobehavioral functioning across the lifespanK23AG073528 · NIA · MEDICAL COLLEGE OF WISCONSIN · PI BRETT, BENJAMIN L · 2021 to 2025
$661k
NIA NIH HHS K23 AG073528NICHD NIH HHS P50 HD105351
6 · The paper itself

Abstract

background and purposePostmortem and experimental studies indicate a potential association between repeated concussions and stroke risk in older contact sport athletes. We examined the relationship between concussion and stroke history in former National Football League players aged ≥50 years.

methodsFormer professional football players aged ≥50 years who played ≥1 year in the National Football League were enrolled in the cross-sectional study. Indirect standardization was used to calculate overall and decade-specific standardized prevalence ratios. Logistic regression using Firth's bias reduction method examined the association between lifetime concussion history 0 (n=119; 12.2%), 1 to 2 (n=152; 15.5%), 3 to 5 (n=242; 24.7%), 6 to 9 (201; 20.5%), and 10+(n=265; 27.1%) and stroke. Adjusted odds ratios for stroke were calculated for concussion history groups, age, and coronary artery disease and/or myocardial infarction.

resultsThe 979 participants who met inclusion criteria had a mean age of 65.0±9.0 years (range, 50-99). The prevalence of stroke was 3.4% (n=33), significantly lower than expected based on rates of stroke in US men aged 50 and over (standardized prevalence ratio=0.56, Z= -4.56,

conclusionsThe prevalence of stroke among former National Football League players aged ≥50 years was lower than the general population, with significantly increased risk among those with 10 or more prior concussions. Findings add to the evidence suggesting that traumatic brain injuries are associated with increased risk of stroke. Clinically, management of cardio- and cerebrovascular health may be pertinent to those with a history of multiple prior concussions.

Indexed as

AdultAgedAthletesBrain ConcussionCross-Sectional StudiesFemaleFootballHumansMaleMiddle AgedPrevalenceStrokeagingcerebrovascular accidentconcussionmild traumatic brain injurystroketraumatic brain injury

Identifiers

PMID34839696
PMCPMC8966617
OpenAlexW3214760975

What OpenQuestion holds

Textmetadata
LicenceTDM
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.