title: Comparison of preseason, midseason, and postseason neurocognitive scores in uninjured collegiate football players.
abstract: BACKGROUND
  College football players sustain an average of 3 subconcussive blows to the head per game. Concussions correlate with decreases in standardized neurocognitive test scores. It is not known whether repetitive, subconcussive microtrauma associated with participation in a full season of collision sport affects neurocognitive test scores.
  
  
  OBJECTIVE
  No difference exists between preseason, midseason, and postseason Standardized Assessment of Concussion (SAC) and Immediate Post-Concussion Assessment and Cognitive Testing (ImPACT) scores when collegiate football players sustain subconcussive microtrauma from forceful, repetitive contact activity.
  
  
  METHODS
  Case series; Level of evidence, 4.
  
  
  METHODS
  Fifty-eight members of a Division III collegiate football team who had no known concussion during the season voluntarily completed the SAC and ImPACT instruments preseason, midseason, and postseason. A repeated measures analysis of variance was used to compare the scores at the 3 time intervals (P < .05).
  
  
  RESULTS
  No statistically significant decreases were found in overall SAC or ImPACT scores or in any of the domains or composites of the tests (P < .05) when preseason, midseason, and postseason scores were evaluated.
  
  
  CONCLUSIONS
  ImPACT and SAC neurocognitive test scores are not significantly altered by a season of repetitive contact in collegiate football athletes who have not sustained a concussion.
  
  
  CONCLUSIONS
  A diminution in SAC or ImPACT scores in concert with clinical symptoms and findings should be interpreted as evidence of a postconcussive event.
authors.affiliation: Idaho Sports Medicine Institute, Boise, Idaho, USA.
authors.forename: Jennifer R
authors.initials: JR
authors.lastname: Miller
authors.forename: Gregory J
authors.initials: GJ
authors.lastname: Adamson
authors.forename: Marilyn M
authors.initials: MM
authors.lastname: Pink
authors.forename: John C
authors.initials: JC
authors.lastname: Sweet
mesh_terms: D001924:Brain Concussion / Q000523:psychology*; D003071:Cognition; D005538:Football; D006801:Humans; D008297:Male; D011594:Psychometrics / Q000295:instrumentation*; D014481:United States; D014495:Universities