title: Constituent year: a new consideration for injury risk in Canadian youth ice hockey.
abstract: OBJECTIVE
  To examine if chronological age within Canadian youth ice hockey's 2-year age bands influences the proportion of injury.
  
  
  METHODS
  Retrospective secondary data analyses.
  
  
  METHODS
  Information on 4736 injured youth ice hockey players (10-15 years old) reported by the Canadian Hospitals Injury Reporting Prevention Program (CHIRPP) and 4959 (12-15 years old) injured players reported by the Hockey Canada Insurance Database (HCID).
  
  
  METHODS
  Proportions of injuries according to constituent year (first vs second year of participation within 2-year youth ice hockey age bands).
  
  
  METHODS
  The influence of age band (Atom, 10/11; Peewee, 12/13; Bantam, 14/15) and level of competitive play on constituent year injury proportions were examined.
  
  
  RESULTS
  Injured Atom and Peewee players (CHIRPP) were more likely to be in constituent year 2 (Atom: odds ratio [OR], 1.72; 95% confidence interval [CI], 1.46-2.03; Peewee: OR, 1.25; 95% CI, 1.10-1.42). Injured players (HCID) at the highest tiers of competitive play were more likely to be in constituent year 2 (eg, Peewee: OR, 2.91; 95% CI, 1.92-4.41; Bantam: 1.89; 95% CI, 1.46-2.46).
  
  
  CONCLUSIONS
  Constituent year may be a factor in determining injury risk and may be relevant to those managing the risk of injury for youth ice hockey players.
authors.affiliation: Carnegie Faculty of Sport and Education, Leeds Metropolitan University, Leeds, United Kingdom. n.wattie@leedsmet.ac.uk
authors.forename: Nick
authors.initials: N
authors.lastname: Wattie
authors.forename: Stephen P
authors.initials: SP
authors.lastname: Cobley
authors.forename: Alison
authors.initials: A
authors.lastname: Macpherson
authors.forename: William J
authors.initials: WJ
authors.lastname: Montelpare
authors.forename: Jim
authors.initials: J
authors.lastname: McKenna
authors.forename: Andrew
authors.initials: A
authors.lastname: Howard
authors.forename: Joseph
authors.initials: J
authors.lastname: Baker
mesh_terms: D000293:Adolescent; D000367:Age Factors; D002170:Canada; D002648:Child; D003163:Competitive Behavior; D016208:Databases, Factual; D006688:Hockey / Q000293:injuries*; D006801:Humans; D016015:Logistic Models; D012189:Retrospective Studies; D018570:Risk Assessment