Table 1

Return to sport guidelines

Severity grade1st concussion2nd concussion3rd concussion
PTA, Post-traumatic amnesia; LOC, loss of consciousness; RTP, return to play.
Cantu system 35, 36
Grade 1 (No LOC, PTA <30 min)RTP after 1 week if asymptomaticRTP in 2 weeks if asymptomatic for at least 1 weekTerminate season. RTP next season if asymptomatic
Grade 2 (LOC <5 min, PTA >30 min)RTP after 1 week if asymptomatic for at least 1 weekMinimum of 1 month off sport. RTP if asymptomatic for at least 1 week. Consider terminate seasonTerminate season. RTP next season if asymptomatic
Grade 3 (LOC >5 min, PTA >24 h)Minimum of 1 month off sport. RTP if asymptomatic for at least 1 weekTerminate season. RTP next season if asymptomatic
Colorado/AAN guidelines 32, 33, 37
Grade 1 (No LOC, confusion, no amnesia)RTP after 20 minutes if asymptomaticRTP if asymptomatic for at least 1 weekTerminate season. RTP next season if asymptomatic
Grade 2 (No LOC, confusion, amnesia)RTP after a minimum of 1 week with no symptomsRTP after a minimum of 1 month with no symptoms for at least 1 weekTerminate season. RTP next season if asymptomatic
Grade 3 (LOC)RTP after a minimum of 2 weeks with no symptoms.Terminate season. RTP next season if asymptomaticTerminate season. RTP next season if asymptomatic
Jordan guidelines 34
Grade 1RTP if asymptomatic at rest and with exertionNot statedNot stated
Grade 2RTP if asymptomatic for at least 1 weekNot statedNot stated
Grade 3Minimum of 1 month off sport, must then be asymptomatic for at least 1 weekNot statedNot stated
Grade 4Minimum of 1 month off sport, RTP if asymptomatic for at least 2 weeksNot statedNot stated