title: Injuries in Canadian youth ice hockey: the influence of relative age.
abstract: OBJECTIVE
  The purpose of this study was to investigate the relationship between relative age and injury prevalence in Canadian youth ice hockey.
  
  
  METHODS
  In study 1, youth ice hockey-related injuries (among children 10-15 years of age) collected by the Canadian Hospitals Injury Reporting and Prevention Program between 1995 and 2002 were analyzed. The relative ages of injured children were compared across different age groups and injury characteristics (mechanism of injury and severity of injury). In study 2, injuries reported in the Hockey Canada Insurance Database were analyzed. The relative ages of injured children at different levels of play (ie, representative versus house league teams) were compared.
  
  
  RESULTS
  In study 1, the majority of injured players were of older relative age. However, relative age was not related to mechanism of injury or severity of injury. In study 2, approximately 40% of injured players at the highest level of play were relatively older, whereas only 20% to 25% of house league injured players were relatively older.
  
  
  CONCLUSIONS
  Relatively older children within ice hockey age groups are at increased risk of injury compared with their younger peers. Furthermore, the risk of injury for relatively older players is greater at more competitive levels of play. This study proposes that the relative age advantage associated with selection to Canadian youth ice hockey teams is accompanied by an increased risk of injury.
authors.affiliation: School of Kinesiology and Health Science, York University, 4700 Keele St, Toronto, Ontario, Canada M3J 1P3.
authors.forename: Nick
authors.initials: N
authors.lastname: Wattie
authors.forename: Stephen
authors.initials: S
authors.lastname: Cobley
authors.forename: Alison
authors.initials: A
authors.lastname: Macpherson
authors.forename: Andrew
authors.initials: A
authors.lastname: Howard
authors.forename: William J
authors.initials: WJ
authors.lastname: Montelpare
authors.forename: Joseph
authors.initials: J
authors.lastname: Baker
mesh_terms: D000293:Adolescent; D000367:Age Factors; D001265:Athletic Injuries / Q000453:epidemiology / Q000517:prevention & control; D002170:Canada / Q000453:epidemiology; D002648:Child; D006688:Hockey / Q000293:injuries*; D006801:Humans; D008297:Male