Evidence map›Paper›PMID 25356413›Full record

ArticleAnnals of clinical and translational neurology2014

Multiple prior concussions are associated with symptoms in high school athletes.

Rebekah Mannix, Grant L Iverson, Bruce Maxwell, Joseph E Atkins, Ross Zafonte, Paul D Berkner

Abstract read
In one paragraph

Article in Annals of clinical and translational neurology, 2014. The graph could read no effect estimate from its abstract, so it casts no vote on the map. Cited by 21 papers, 1 of them a synthesis that pooled it.

0numbers the graph read from it
0cells of the map it votes in
21citing 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

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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

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

  1. Pooled it
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  7. Accommodative and Vergence Responses to a Moving Stimulus in Concussion.Investigative ophthalmology & visual science · 2024
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  13. Impairment of cerebrovascular reactivity in response to hypercapnic challenge in a mouse model of repetitive mild traumatic brain injury.Journal of cerebral blood flow and metabolism : official journal of the International Society of Cerebral Blood Flow and Metabolism · 2021
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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

6 authors.

Rebekah MannixDivision of Emergency Medicine, Boston Children's Hospital Boston, Massachusetts ; Harvard Medical School Boston, Massachusetts.
Grant L IversonHarvard Medical School Boston, Massachusetts ; Department of Physical Medicine and Rehabilitation, Harvard Medical School Boston, Massachusetts ; Red Sox Foundation and Massachusetts General Hospital Home Base Program Boston, Massachusetts ; Spaulding Rehabilitation Hospital Boston, Massachusetts.
Bruce MaxwellDepartment of Computer Science, Colby College Waterville, Maine.
Joseph E AtkinsDepartment of Psychology, Colby College Waterville, Maine.
Ross ZafonteHarvard Medical School Boston, Massachusetts ; Department of Physical Medicine and Rehabilitation, Harvard Medical School Boston, Massachusetts ; Red Sox Foundation and Massachusetts General Hospital Home Base Program Boston, Massachusetts ; Spaulding Rehabilitation Hospital Boston, Massachusetts.
Paul D BerknerHealth Services, Colby College Waterville, Maine.

Funding

No grant is acknowledged in the PubMed record.

6 · The paper itself

Abstract

objectivesThe purpose of this study was to evaluate the association of prior concussion on baseline computerized neurocognitive testing in a large cohort of high school athletes.

methodsThis is a retrospective cohort study of student athletes from 49 Maine High Schools in 2010 who underwent baseline computerized neurocognitive evaluation with Immediate Post-Concussion Assessment and Cognitive Testing (ImPACT®). As part of the ImPACT®, subjects reported a prior history of concussion as well as demographic information and a symptom questionnaire. We used linear regression to evaluate the association of prior concussion with baseline: (1) ImPACT® composite scores; and (2) symptom scores.

resultsSix thousand seventy-five subjects were included in the study, of whom 57% were boys. The majority of student athletes (85.3%) reported no prior history of concussion while 4.6% reported having sustained two or more prior concussions. On simple linear regression, increasing number of concussions was related to worse performance in verbal memory (P = 0.039) and greater symptoms scores (P < 0.001). On multivariate modeling, only the association with baseline symptoms remained (P < 0.001). Other factors associated with baseline symptom reporting in the multivariate model included mental health history, headache/migraine history, gender, developmental and/or learning problems, and number of prior concussions.

interpretationIn this large-scale, retrospective survey study, history of multiple prior concussions was associated with higher symptom burden but not baseline computerized neurocognitive testing. The association between baseline symptom reporting and clinical and demographic factors was greater than the association with a history of multiple concussions.

Identifiers

PMID25356413
PMCPMC4184671

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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.