Incidence rates were calculated per 100 regular season games. IRRs for concussions and concussions plus suspected concussions were calculated relative to the 2010–11 season. Concussion incidence rate
Total numbers of concussions, suspected concussions and suspected concussions associated with facial fractures occurring during all of regular season play are shown for each season in the OHL and NHL.
Incidence rates were calculated per 100 regular season games. IRRs for concussions and concussions plus suspected concussions were calculated relative to the 2010–11 season. Concussion incidence rate
