title: Sport-related concussion: factors associated with prolonged return to play.
abstract: OBJECTIVE
  To assess predictive value of concussion signs and symptoms based on return-to-play timelines.
  
  
  METHODS
  Physician practice study without diagnosis that includes presentation, initial and subsequent treatment, and management of concussion.
  
  
  METHODS
  National multisite primary care sports medicine provider locations.
  
  
  METHODS
  Twenty-two providers at 18 sites; 101 athletes (91 men, 10 women in the following sports: 73 football, 8 basketball, 8 soccer, 3 wrestling, 2 lacrosse, 2 skiing, 5 others; 51 college, 44 high school, 4 professional, and 2 recreational).
  
  
  METHODS
  Duration of symptoms, presence of clinical signs, and time to return to play following concussion.
  
  
  RESULTS
  One hundred one concussions were analyzed. Pearson chi2 analysis of common early and late concussion symptoms revealed statistical significance (P < 0.05) of headache >3 hours, difficulty concentrating >3 hours, any retrograde amnesia or loss of consciousness, and return to play >7 days. There appeared to be a trend in patients with posttraumatic amnesia toward poor outcome, but this was not statistically significant.
  
  
  CONCLUSIONS
  When evaluating concussion, symptoms of headache >3 hours, difficulty concentrating >3 hours, retrograde amnesia, or loss of consciousness may indicate a more severe injury or prolonged recovery; great caution should be exercised before returning these athletes to play.
authors.affiliation: Department of Family Practice, DeWitt Army Community Hospital, Fort Belvoir, VA 22060, USA. chad.asplund@us.army.mil
authors.forename: Chad A
authors.initials: CA
authors.lastname: Asplund
authors.forename: Douglas B
authors.initials: DB
authors.lastname: McKeag
authors.forename: Cara H
authors.initials: CH
authors.lastname: Olsen
mesh_terms: D000293:Adolescent; D000328:Adult; D017677:Age Distribution; D001265:Athletic Injuries / Q000175:diagnosis* / Q000453:epidemiology; D001924:Brain Concussion / Q000453:epidemiology / Q000209:etiology* / Q000503:physiopathology*; D015331:Cohort Studies; D005260:Female; D006801:Humans; D015994:Incidence; D015601:Injury Severity Score; D008297:Male; D038223:Post-Concussion Syndrome / Q000453:epidemiology / Q000503:physiopathology*; D011237:Predictive Value of Tests; D011336:Probability; D011379:Prognosis; D020127:Recovery of Function; D012307:Risk Factors; D017678:Sex Distribution; D013177:Sports; D011795:Surveys and Questionnaires; D013997:Time Factors