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Br J Sports Med 43:i76-i84 doi:10.1136/bjsm.2009.058248
  • Supplement

Consensus Statement on Concussion in Sport: the 3rd International Conference on Concussion in Sport held in Zurich, November 2008

Table 2 Concussion modifiers
Factors Modifier
Symptoms Number
Duration (>10 days)
Severity
Signs Prolonged loss of consciousness (>1 min), amnesia
Sequelae Concussive convulsions
Temporal Frequency—repeated concussions over time
Timing—injuries close together in time
“Recency”—recent concussion or traumatic brain injury
Threshold Repeated concussions occurring with progressively less impact force or slower recovery after each successive concussion
Age Child and adolescent (<18 years old)
Co- and pre-morbidities Migraine, depression or other mental health disorders, attention deficit hyperactivity disorder, learning disabilities, sleep disorders
Medication Psychoactive drugs, anticoagulants
Behaviour Dangerous style of play
Sport High risk activity, contact and collision sport, high sporting level

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