Cumulative Effects Associated With Recurrent Concussion in Collegiate Football Players: The NCAA Concussion Study
Kevin M. Guskiewicz,Michael McCrea,Michael McCrea,Stephen W. Marshall,Robert C. Cantu,Robert C. Cantu,Christopher Randolph,Christopher Randolph,William B. Barr,James A. Onate,James P. Kelly,James P. Kelly +11 more
TLDR
This study suggests thatPlayers with a history of previous concussions are more likely to have future concussive injuries than those with no history; 1 in 15 players with a concussion may have additional concussions in the same playing season; and previous concussion may be associated with slower recovery of neurological function.Abstract:
ContextApproximately 300 000 sport-related concussions occur annually
in the United States, and the likelihood of serious sequelae may increase
with repeated head injury.ObjectiveTo estimate the incidence of concussion and time to recovery after concussion
in collegiate football players.Design, Setting, and ParticipantsProspective cohort study of 2905 football players from 25 US colleges
were tested at preseason baseline in 1999, 2000, and 2001 on a variety of
measures and followed up prospectively to ascertain concussion occurrence.
Players injured with a concussion were monitored until their concussion symptoms
resolved and were followed up for repeat concussions until completion of their
collegiate football career or until the end of the 2001 football season.Main Outcome MeasuresIncidence of concussion and repeat concusion; type and duration of symptoms
and course of recovery among players who were injured with a concussion during
the seasons.ResultsDuring follow-up of 4251 player-seasons, 184 players (6.3%) had a concussion,
and 12 (6.5%) of these players had a repeat concussion within the same season.
There was an association between reported number of previous concussions and
likelihood of incident concussion. Players reporting a history of 3 or more
previous concussions were 3.0 (95% confidence interval, 1.6-5.6) times more
likely to have an incident concussion than players with no concussion history.
Headache was the most commonly reported symptom at the time of injury (85.2%),
and mean overall symptom duration was 82 hours. Slowed recovery was associated
with a history of multiple previous concussions (30.0% of those with ≥3
previous concussions had symptoms lasting >1 week compared with 14.6% of those
with 1 previous concussion). Of the 12 incident within-season repeat concussions,
11 (91.7%) occurred within 10 days of the first injury, and 9 (75.0%) occurred
within 7 days of the first injury.ConclusionsOur study suggests that players with a history of previous concussions
are more likely to have future concussive injuries than those with no history;
1 in 15 players with a concussion may have additional concussions in the same
playing season; and previous concussions may be associated with slower recovery
of neurological function.read more
Citations
More filters
Journal ArticleDOI
Is rest the best intervention for concussion? Lessons learned from the whiplash model.
Neil Craton,Oliver Leslie +1 more
TL;DR: The concern is that the current construct of concussion represents a syndrome of multiple overlapping conditions, in which patients are vulnerable to the false attribution of everyday feelings to brain injury, when brain injury either has resolved or not transpired.
Journal ArticleDOI
Coaches’ Implementation of the USA Football “Heads Up Football” Educational Program:
Zachary Y. Kerr,Emily Kroshus,Emily Kroshus,Joseph G. L. Lee,Susan W. Yeargin,Thomas P. Dompier +5 more
TL;DR: The lack of PSC on-site presence was significantly associated with worse implementation for “concussion recognition and response,” “heat preparedness and hydration,’ and “sudden cardiac event preparedness” and PSC clinic attendance was not associated with implementation.
Journal ArticleDOI
Injury Surveillance of Head, Neck, and Facial Injuries in Collegiate Ice Hockey Players, 2009–2010 Through 2013–2014 Academic Years
TL;DR: A larger proportion of HFN injuries in ice hockey occurred during checking in men versus women, and Injury-prevention programs should aim to reduce checking-related injuries.
Journal ArticleDOI
Alterations in neurovascular coupling following acute traumatic brain injury.
Hyounguk Jang,Hyounguk Jang,Stanley Huang,Daniel X. Hammer,Lin Wang,Harmain Rafi,Meijun Ye,Cristin G. Welle,Cristin G. Welle,Jonathan A. N. Fisher,Jonathan A. N. Fisher +10 more
TL;DR: Overall, the results reveal an array of stereotyped, injury-induced alterations in electrophysiological and hemodynamic responses that can be rapidly obtained using a combination of portable detection techniques.
Journal ArticleDOI
A method of evaluating helmet rotational acceleration protection using the Kingston Impact Simulator (KIS Unit).
Mihaly Kis,Fraser W. Saunders,Isabella Irrcher,Charles H. Tator,Patrick J. Bishop,Martin ten Hove +5 more
TL;DR: KIS is a novel testing methodology that identifies rotation force protection within and between hockey helmet models and manufacturers at different impact location and planes and may be useful in improving future helmet design and construction to provide maximal protection against the forces causing concussion.
References
More filters
Journal ArticleDOI
Longitudinal data analysis using generalized linear models
Kung Yee Liang,Scott L. Zeger +1 more
TL;DR: In this article, an extension of generalized linear models to the analysis of longitudinal data is proposed, which gives consistent estimates of the regression parameters and of their variance under mild assumptions about the time dependence.
Journal ArticleDOI
Longitudinal data analysis for discrete and continuous outcomes.
Scott L. Zeger,Kung-Yee Liang +1 more
TL;DR: A class of generalized estimating equations (GEEs) for the regression parameters is proposed, extensions of those used in quasi-likelihood methods which have solutions which are consistent and asymptotically Gaussian even when the time dependence is misspecified as the authors often expect.
Book
Generalized, Linear, and Mixed Models
TL;DR: In this paper, the authors present a model for estimating the effect of random effects on a set of variables in a linear mixed model with the objective of finding the probability of a given variable having a given effect.
Journal ArticleDOI
Acute Effects and Recovery Time Following Concussion in Collegiate Football Players: The NCAA Concussion Study
Michael McCrea,Kevin M. Guskiewicz,Stephen W. Marshall,William B. Barr,Christopher Randolph,Christopher Randolph,Robert C. Cantu,Robert C. Cantu,James A. Onate,Jingzhen Yang,James P. Kelly +10 more
TL;DR: In this paper, a study of 1631 football players from 15 US colleges found that players with concussions exhibited more severe symptoms (mean GSC score 20.93 [95% confidence interval {CI, 15.65-26.21] points higher than that of controls), cognitive impairments (mean SAC score 2.94 [ 95% CI, 1.41 to 2.06], cognitive functioning improved to baseline levels within 5 to 7 days (day 7 SAC mean difference, −0.33;
Journal Article
The Neurometabolic Cascade of Concussion
TL;DR: Improved guidelines for clinical management of concussion may be formulated as the functional significance and duration of these postinjury neurometabolic derangements are better delineated.
Related Papers (5)
Consensus statement on concussion in sport
Paul McCrory,Willem H. Meeuwisse,Mark Aubry,Bob Cantu,Jiří Dvořák,Ruben J. Echemendia,Lars Engebretsen,Karen M. Johnston,Jeffrey S. Kutcher,Martin Raftery,Allen Sills,Brian W. Benson,Gavin A Davis,Richard G. Ellenbogen,Kevin M. Guskiewicz,Stanley A. Herring,Grant L. Iverson,Barry D. Jordan,James Kissick,Michael McCrea,Andrew S. McIntosh,David Maddocks,Michael Makdissi,Laura Purcell,Margot Putukian,Kathryn J Schneider,Charles H. Tator,Michael Turner +27 more