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Subject:

SPORTS MEDICINE : SPORTS: INJURIES: CONCUSSSIONS : SPORTS: FOOTBALL: PROFESSIONAL (NFL): STATISTICS : DATA: Twelve Years of National Football League Concussion Data

From:

"David P. Dillard" <[log in to unmask]>

Reply-To:

To support research in sports medicine <[log in to unmask]>

Date:

Sat, 14 Oct 2017 19:44:30 -0400

Content-Type:

TEXT/PLAIN

Parts/Attachments:

Parts/Attachments

TEXT/PLAIN (467 lines)

.

.


SPORTS MEDICINE :

SPORTS: INJURIES: CONCUSSSIONS :

SPORTS: FOOTBALL: PROFESSIONAL (NFL):

STATISTICS :

DATA:

Twelve Years of National Football League Concussion Data

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Twelve Years of National Football League Concussion Data

Ira R. Casson, MD,* Dr med David C. Viano, PhD, John W. Powell, PhD,? and 
Elliot J. Pellman, MD#

Sports Health

2010 Nov; 2(6): 471483.

doi:  10.1177/1941738110383963

https://www.ncbi.nlm.nih.gov/pmc/articles/PMC3438866/

Abstract

.

Background:

.

Concussion in the National Football League (NFL) remains an important 
issue. An initial description of the injury epidemiology involved 6 years 
from 1996 to 2001.

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Hypothesis:

The increased attention to concussions may have resulted in team 
physicians being more conservative in treating players in recent years.

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Study Design:

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Two consecutive 6-year periods (1996-2001 and 2002-2007) were compared to 
determine changes in the circumstances associated with the injury, the 
patterns of signs and symptoms, and the players time loss from 
participation in the NFL.

.

Methods:

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During 2002-2007, concussions were recorded by NFL team physicians and 
athletic trainers using the same standardized reporting form used from 
1996 to 2001. Player position, type of play, concussion signs and 
symptoms, loss of consciousness, and medical action taken were recorded.

.

Results:

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There were 0.38 documented concussions per NFL game in 2002-20077.6% lower 
than the 0.42 in the earlier period (1996-2001). The injury rate was lower 
in quarterbacks and wide receivers but significantly higher in tight ends 
during the second 6 years. The most frequent symptoms were headaches and 
dizziness; the most common signs were problems with information processing 
and immediate recall. During 2002-2007, a significantly lower fraction of 
concussed players returned to the same game, and more were removed from 
play. Most concussed players (83.5%) returned to play in < 7 days; the 
percentage decreased to 57.4% with loss of consciousness. The number of 
players returning in < 7 days was 8% lower during 2002-2007 and 25% lower 
for those with loss of consciousness.

.

Conclusion:

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The most recent 6 years of NFL concussion data show a remarkable 
similarity to the earlier period. However, there was a significant 
decrease in the percentage of players returning to the same game, and 
players were held out of play longer.

.

Clinical Relevance:

There was a more conservative management of concussion in NFL players from 
2002 to 2007 even though the clinical signs and symptoms remained similar 
to the earlier 6-year period.

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Keywords:

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concussion, traumatic brain injury, injury epidemiology, sport 
injury prevention


.

.

Topics Covered in This Article

Materials and Methods

Signs and Symptoms

Data Documentation

Data Analysis and Statistics

Results

Discussion

Physician Management of Concussion

Neuropsychological Testing

Change in Concussion Incidence

Rules of Play

Tight Ends

Kickoffs and Punts

Quarterbacks and Defensive Linemen

Summary

There are a number of possible explanations for the changes in the RTP 
data and the incidence of concussion during the second 6-year period. 
Multiple factors may have played a role in causing these differences, 
including the efforts by the NFL, the NFL Players Association, NFL team 
athletic trainers and physicians, and safety equipment manufacturers to 
ameliorate the effects of head injury on NFL players.
Go to:
Acknowledgments

The authors were members of the National Football Leagues Mild Traumatic 
Brain Injury Committee during the conduct of this research. Funding for 
the research was provided by the National Football League and NFL 
Charities, the latter of which is funded by the National Football League 
Players Association and the league. Their support and encouragement to 
conduct research on concussion are greatly appreciated.

The opinions and views presented in this article are those of the authors 
and not necessarily the National Football League. They are offered as part 
of an effort to better understand the causes and consequences of playing 
football on the brain and to lay out what additional efforts are needed to 
prevent brain injury and improve the health, safety, and welfare of 
individuals playing football.

The assistance of the National Football League team physicians and 
athletic trainers is appreciated in filling out the concussion reports, 
and so are the players who consented to participate in the epidemiology 
study through a blinded identification in the concussion database. We also 
thank the staff at Med Sports Systems for their efforts in managing and 
verifying the concussion data.
Go to:


Footnotes

The authors declared that they had no conflicts of interest in the 
authorship and publication of this contribution.

Go to:


References


1. Casson IR, Pellman EJ, Viano DC. Concussion in the National Football 
League: an overview for neurologists. Neurol Clin. 2008;26:217-241 
[PubMed]


2. Casson IR, Viano DC, Pellman EJ. Synopsis of the National Football 
League player health and safety meeting: Chicago, Illinois, June 19, 2007. 
Neurosurgery. 2008;62:204-210 [PubMed]


3. Pellman EJ, Powell JW, Viano DC, et al. Concussion in professional 
football: epidemiological features of game injuries and review of the 
literature. Part 3. Neurosurgery. 2004;54:81-97 [PubMed]


4. Pellman EJ, Viano DC, Casson IR, Arfken C, Feuer H. Concussion in 
professional football: players returning to the same game. Part 7. 
Neurosurgery. 2005;56:79-92 [PubMed]


5. Pellman EJ, Viano DC, Casson IR, Arfken C, Powell J. Concussion in 
professional football: injuries involving 7+ days out. Part 5. 
Neurosurgery. 2004;55:1100-1119 [PubMed]


6. Pellman EJ, Viano DC, Casson IR, et al. Concussion in professional 
football: repeat injuries. Part 4. Neurosurgery. 2004;55:860-876 [PubMed]


7. Pellman EJ, Viano DC. Concussion in professional football: summary of 
the research conducted by the National Football Leagues Committee on Mild 
Traumatic Brain Injury. Neurosurg Focus. 2006;21(4):e12. [PubMed]



.

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The complete article may be read at the URL above.

.

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Google Scholar

Twelve years of National Football League concussion data IR Casson, DC 
Viano, JW Powell - Sports Health, 2010 - journals.sagepub.com Background: 
Concussion in the National Football League (NFL) remains an important 
issue. An initial description of the injury epidemiology involved 6 years 
from 1996 to 2001. Hypothesis: The increased attention to concussions may 
have resulted in team physicians Cited by 80 Related articles All 10 
versions

http://tinyurl.com/yd8wfrpn


Content Sample


Twelve years of National Football League concussion data IR Casson, DC 
Viano, JW Powell - Sports Health, 2010 - journals.sagepub.com Background: 
Concussion in the National Football League (NFL) remains an important 
issue. An initial description of the injury epidemiology involved 6 years 
from 1996 to 2001. Hypothesis: The increased attention to concussions may 
have resulted in team physicians Cited by 80 Related articles All 10 
versions



[HTML] nih.gov A prospective study of concussions among National Hockey 
League players during regular season games: the NHL-NHLPA Concussion 
Program BW Benson, WH Meeuwisse, J Rizos - Canadian Medical , 2011 - Can 
Med Assoc Cited by 114 Related articles All 16 versions National high 
school athlete concussion rates from 2005-2006 to 2011-2012 JA Rosenthal, 
RE Foraker, CL Collins - American journal of , 2014 - journals.sagepub.com 
Cited by 110 Related articles All 9 versions



[HTML] nih.gov Repeat concussions in the national football league IR 
Casson, DC Viano, JW Powell - Sports Health, 2011 - journals.sagepub.com 
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[PDF] academia.edu Frequency, magnitude, and distribution of head impacts 
in Pop Warner football: the cumulative burden RH Wong, AK Wong, JE Bailes 
- Clinical neurology and neurosurgery, 2014 - Elsevier A growing body of 
research suggests that subconcussive head impacts or repetitive mild 
Traumatic Brain Injury (mTBI) can have cumulative and deleterious effects. 
Cited by 39 Related articles All 11 versions On-field performance of 
National Football League players after return from concussion NS Kumar, M 
Chin, C O'Neill - American journal of , 2014 - journals.sagepub.com Cited 
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[HTML] bmj.com Epidemiology of concussion in men9s elite Rugby-7s (Sevens 
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and Rugby Trophy, CW Fuller, A Taylor, M Raftery - Br J Sports Med, 2015 - 
bjsm.bmj.com Skip to main content. This site uses cookies. More info By 
continuing to browse the site you are agreeing to our use of cookies. Find 
out more here. Viewing from: Google Indexer. BMJ Journals. Subscribe; Log 
In More Log in via ... Cited by 46 Related articles All 12 versions



[HTML] sagepub.com Descriptive epidemiology of musculoskeletal injuries 
and concussions in the National Football League, 2012-2014 DW Lawrence, MG 
Hutchison - Orthopaedic journal of , 2015 - journals.sagepub.com Cited by 
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[HTML] nih.gov Frequency of head-impactrelated outcomes by position in 
NCAA Division I collegiate football players CM Baugh, PT Kiernan, E 
Kroshus - Journal of , 2015 - online.liebertpub.com ... Concussions during 
the 1997 Canadian football league season. Clin. J. Sport Med. 10, 914. 33. 
IR Casson, DC Viano, JW Powell, and EJ Pellman (2010). Twelve years of 
national football league concussion data. Sports Health. 2, 471483. 34. 
... Cited by 47 Related articles All 10 versions



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head injury. J Neuropathol Exp Neurol 68:70935, 2009 42. Casson IR, Viano 
DC, Powell JW, et al: Twelve years of National Football League concussion 
data. Sports Health 2:471 83, 2010 43. Guskiewicz KM, Marshall ... Cited 
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Sincerely,
David Dillard
Temple University
(215) 204 - 4584
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