Evidence map›Paper›PMID 27474382›Full record

ArticleThe American journal of sports medicine2016

Multiple Past Concussions in High School Football Players: Are There Differences in Cognitive Functioning and Symptom Reporting?

Brian L Brooks, Rebekah Mannix, Bruce Maxwell, Ross Zafonte, Paul D Berkner, Grant L Iverson

Open access · greenAbstract read
In one paragraph

Article in The American journal of sports medicine, 2016. 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
15.7field-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

13 citing papers in PubMed, 1 synthesis or guideline pooled it, 92 citations in OpenAlex.

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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 at 5 institutions in 2 countries.

Brian L BrooksNeurosciences Program (Brain Injury and Rehabilitation), Alberta Children's Hospital, Calgary, Alberta, Canada brian.brooks@albertahealthservices.ca.
Rebekah MannixDivision of Emergency Medicine, Brain Injury Center, Boston Children's Hospital, Boston, Massachusetts, USA.
Bruce MaxwellDepartment of Computer Science, Colby College, Waterville, Maine, USA.
Ross ZafonteDepartment of Physical Medicine and Rehabilitation, Spaulding Rehabilitation Hospital, Massachusetts General Hospital, Brigham and Women's Hospital, Harvard Medical School, Boston, Massachusetts, USA.
Paul D BerknerHealth Services and Department of Biology, Colby College, Waterville, Maine, USA.
Grant L IversonRed Sox Foundation and Massachusetts General Hospital Home Base Program, Boston, Massachusetts, USA.
Colby College · USAlberta Children's Hospital · CABoston Children's Hospital · USBoston Foundation · USMassachusetts General Hospital · US

Funding

RESEARCH TRAINING IN PEDIATRIC EMERGENCY MEDICINET32HD040128 · NICHD · CHILDREN'S HOSPITAL BOSTON · PI Kenneth D. Mandl · 2001 to 2026
$5.0M
Improving Outcome Measurement for Medical Rehabilitaiton Clinical TrialsR24HD065688 · NICHD · BOSTON UNIVERSITY MEDICAL CAMPUS · PI JETTE, ALAN MAURICE, ZAFONTE, ROSS DENNIS · 2010 to 2014
$3.9M
NICHD NIH HHS R24 HD065688NICHD NIH HHS T32 HD040128
6 · The paper itself

Abstract

backgroundThere is increasing concern about the possible long-term effects of multiple concussions, particularly on the developing adolescent brain. Whether the effect of multiple concussions is detectable in high school football players has not been well studied, although the public health implications are great in this population. PURPOSE: To determine if there are measureable differences in cognitive functioning or symptom reporting in high school football players with a history of multiple concussions. STUDY

designCross-sectional study; Level of evidence, 3.

methodsParticipants included 5232 male adolescent football players (mean [±SD] age, 15.5 ± 1.2 years) who completed baseline testing between 2009 and 2014. On the basis of injury history, athletes were grouped into 0 (n = 4183), 1 (n = 733), 2 (n = 216), 3 (n = 67), or ≥4 (n = 33) prior concussions. Cognitive functioning was measured by the Immediate Post-Concussion Assessment and Cognitive Testing (ImPACT) battery, and symptom ratings were obtained from the Post-Concussion Symptom Scale.

resultsThere were no statistically significant differences between groups (based on the number of reported concussions) regarding cognitive functioning. Athletes with ≥3 prior concussions reported more symptoms than did athletes with 0 or 1 prior injury. In multivariate analyses, concussion history was independently related to symptom reporting but less so than developmental problems (eg, attention or learning problems) or other health problems (eg, past treatment for psychiatric problems, headaches, or migraines).

conclusionIn the largest study to date, high school football players with multiple past concussions performed the same on cognitive testing as those with no prior concussions. Concussion history was one of several factors that were independently related to symptom reporting.

Indexed as

CognitionAdolescentBrain ConcussionCross-Sectional StudiesFootballHumansMaleNeuropsychological TestsPost-Concussion SyndromeRecurrenceSchoolsUnited Statesadolescentchildpostconcussion syndromesportstraumatic brain injury

Identifiers

PMID27474382
PMCPMC5382791
OpenAlexW2498216799

What OpenQuestion holds

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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.