Table 2: Modifying factors in concussion management from consensus guidelines.


symptomsDuration (>10 days)
SignsProlonged loss of consciousness (.1 min), amnesia
SequelaeConcussive convulsions
Frequency—repeated concussions over time
TemporalTiming—injuries close together in time
“Recency”—recent concussion or traumatic brain injury
ThresholdRepeated concussions occurring with progressively less impact force or slower recovery after each successive concussion
AgeChild and adolescent (18 years old)
Co- and premorbiditiesMigraine, depression or other mental health disorders, attention deficit hyperactivity disorder, learning disabilities, sleep disorders
MedicationPsychoactive drugs, anticoagulants
BehaviorDangerous style of play
SportHigh risk activity, contact and collision sport, high sporting level