title: Trends in reporting of mechanisms and incidence of hip injuries in males playing minor ice hockey in Canada: a cross-sectional study.
abstract: BACKGROUND
  There has been a noted increase in the diagnosis and reporting of sporting hip injuries and conditions in the medical literature but reporting at the minor hockey level is unknown. The purpose of this study is to investigate the trend of reporting hip injuries in amateur ice hockey players in Canada with a focus on injury type and mechanism.
  
  
  METHODS
  A retrospective review of the Hockey Canada insurance database was performed and data on ice hockey hip injuries reported between January 2005 and June 2011 were collected. The study population included all male hockey players from Peewee (aged 11-12 years) to Senior (aged 20+ years) participating in amateur level competition sanctioned by Hockey Canada. Reported cases of ice hockey hip injuries were analyzed according to age, mechanism of injury, and injury subtype. Annual injury reporting rates were determined and using a linear regression analysis trended to determine the change in ice hockey hip injury reporting rate over time.
  
  
  RESULTS
  One hundred and six cases of ice hockey-related hip injuries were reported in total. The majority of injuries (75.5%) occurred in players aged 15-20 years playing at the Junior level. Most injuries were caused by a noncontact mechanism (40.6%) and strains were the most common subtype (50.0%). From 2005 to 2010, the number of reported hip injuries increased by 5.31 cases per year and the rate of reported hip injury per 1,000 registered players increased by 0.02 cases annually.
  
  
  CONCLUSIONS
  Reporting of hip injuries in amateur ice hockey players is increasing. A more accurate injury reporting system is critical for future epidemiologic studies to accurately document the rate and mechanism of hip injury in amateur ice hockey players.
authors: Division of Orthopaedic Surgery, Department of Surgery, Hamilton, ON, Canada.
authors: Olufemi R
authors: OR
authors: Ayeni
authors: Division of Orthopaedic Surgery, Department of Surgery, Hamilton, ON, Canada.
authors: Marcin
authors: M
authors: Kowalczuk
authors: Division of Orthopaedic Surgery, Department of Surgery, Hamilton, ON, Canada.
authors: Jordan
authors: J
authors: Farag
authors: Division of Orthopaedic Surgery, Department of Surgery, Hamilton, ON, Canada ; Department of Clinical Epidemiology and Biostatistics, McMaster University, Hamilton, ON, Canada.
authors: Forough
authors: F
authors: Farrokhyar
authors: Division of Orthopaedic Surgery, Department of Surgery, Hamilton, ON, Canada.
authors: Raymond
authors: R
authors: Chu
authors: Department of Orthopaedic Surgery, University of Michigan, Ann Arbor, MI, USA.
authors: Asheesh
authors: A
authors: Bedi
authors: Department of Orthopaedic Surgery, University of Western Ontario, London, ON, Canada.
authors: Kevin
authors: K
authors: Willits
authors: Division of Orthopaedic Surgery, Department of Surgery, Hamilton, ON, Canada ; Department of Clinical Epidemiology and Biostatistics, McMaster University, Hamilton, ON, Canada.
authors: Mohit
authors: M
authors: Bhandari
keywords: amateur ice hockey; hip injury; mechanism; pelvic injury