title: Concussions involving 7 or more days out in the national football league.
abstract: BACKGROUND
  Positions, signs, symptoms, and medical management of National Football League players with concussions involving 7 or more days out (7+) from play were compared for two 6-year study periods (2002-2007 vs 1996-2001).
  
  
  OBJECTIVE
  More players were held out 7+ days in the 2002-2007 period without significant difference in concussion signs and symptoms.
  
  
  METHODS
  Cohort.
  
  
  METHODS
  From 1996 through 2007, National Football League team physicians reported concussion signs and symptoms, medical action taken, and follow-up management.
  
  
  RESULTS
  During the 2002-2007 period, 143 (16.7%) and 33 (3.86%) concussed players were out 7+ days and 21+ days, respectively, compared with 73 (8.2%) and 7 (0.79%) in the 1996-2001 period, a significant difference (z = 5.39, P < .01). The positions with the highest fraction of 7+ days out were the quarterback (24.5% vs 16.1%), linebacker (19.7% vs 4.6%), and wide receiver (19.5% vs 8.2%) in the later versus earlier period. The player positions with the highest odds for being out 7+ days were quarterback (odds ratio = 1.80 vs 4.02), linebacker (odds ratio = 1.28 vs 0.65), and wide receiver (odds ratio = 1.25 vs 1.15). The highest incidence of 7+ days out occurred after passing plays (32.2% vs 37.0%), followed by kickoffs (18.9% vs 21.9%). The majority of players with 7+ days out were removed from the game on the day of injury (74.8% vs 72.6%); a smaller fraction were returned to play on the day of injury in the later 6 years (3.5% vs 6.8%).
  
  
  CONCLUSIONS
  The positions with the highest odds for being out 7+ days with concussion were quarterbacks, linebackers, and wide receivers. In the more recent 6-year period, more players were managed conservatively by being held out 7+ days, even though the signs and symptoms of their concussions were similar to those in the earlier period.
authors.affiliation: Department of Neurology, Long Island Jewish Medical Center, New Hyde Park, New York, and Department of Neurology, Albert Einstein College of Medicine, Bronx, New York.
authors.forename: Ira R
authors.initials: IR
authors.lastname: Casson
authors.forename: David C
authors.initials: DC
authors.lastname: Viano
authors.forename: John W
authors.initials: JW
authors.lastname: Powell
authors.forename: Elliot J
authors.initials: EJ
authors.lastname: Pellman