Overview of included studies providing definitions of concussion*
| Authors, year published | Responsible organisation | Type of manuscript | Restricted to sport concussion (yes/no) | Age group | Concussion grading system (yes/no) | Remarks |
| Congress of Neurological Surgeons, 196637 | Committee on Head Injury Nomenclature | Consensus statement | No | All ages | No | |
| Anon, 199746 | American Academy of Neurology | Consensus statement | Yes | All ages | Yes (mild/moderate/ severe) | |
| Giza et al, 201332 | American Academy of Neurology | Consensus statement | Yes | All ages | No | Revision of 1997 AAN consensus46 |
| Aubry et al, 200212 | CISG | Consensus statement | Yes | All ages | No | |
| McCrory et al, 200528 | CISG | Consensus statement | Yes | All ages | No | Revision of the 2002 consensus12 |
| McCrory et al, 200929 | CISG | Consensus statement | Yes | All ages | No | Revision of the 2005 CISG consensus28 |
| McCrory et al, 201330 | CISG | Consensus statement | Yes | All ages | No | Revision of the 2009 CIGS consensus29 |
| Guskiewicz et al, 200434 | National Athletic Trainers' Association | Consensus statement | Yes | All ages | No | Existing grading systems are reviewed46 47 |
| Broglio et al, 201433 | National Athletic Trainers' Association | Consensus statement | Yes | All ages | No | Revision of 2004 NATA consensus34 |
| No authors listed, 200635 | Team Physician Consensus statement (AAFP, AAOS, ACSM, AMSSM, AOSSM, AOASM) | Consensus statement | Yes | All ages | No | |
| Herring et al, 201136 | Team Physician Consensus statement (AAFP, AAOS, ACSM, AMSSM, AOSSM, AOASM) | Consensus statement | Yes | All ages | No | Revision of 2006 Team Physician Consensus35 |
| Harmon et al, 201331 | American Medical Society for Sports Medicine | Consensus statement | Yes | All ages | No | |
| Berg et al, 201439 | NA | Original research (retrospective) | Yes | All ages | No | Analysis of concussion definitions on popular concussion-related websites |
| Boutis et al, 201538 | NA | Original research (prospective) | No | Children (5–18 years) | No | Implementation of CIGS concussion definition in paediatric ED. |
AAFP, American Academy of Family Physicians; AAN, American Academy of Neurology; AAOS, American Academy of Orthopaedic Surgeons; ACSM, American College of Sports Medicine; AMSSM, American Medical Society for Sports Medicine; AOSSM, American Orthopaedic Society for Sports Medicine; AOASM, American Osteopathic Academy of Sports Medicine; CISG, concussion in sports group; ED, emergency department; NA, not available; NATA, National Athletic Trainers' Association.
*Studies are presented according to the year of publication, with revised versions of statements from a given body following the first version (in descending order).