title: Subsequent Injuries Are More Common Than Injury Recurrences: An Analysis of 1 Season of Prospectively Collected Injuries in Professional Australian Football.
abstract: BACKGROUND
  It is known that some people can, and do, sustain >1 injury over a playing season. However, there is currently little high-quality epidemiological evidence about the risk of, and relationships between, multiple and subsequent injuries.
  
  
  OBJECTIVE
  To describe the subsequent injuries sustained by Australian Football League (AFL) players over 1 season, including their most common injury diagnoses.
  
  
  METHODS
  Cohort study; Level of evidence, 3.
  
  
  METHODS
  Within-player linked injury data on all date-ordered match-loss injuries sustained by AFL players during 1 full season were obtained. The total number of injuries per player was determined, and in those with >1 injury, the Subsequent Injury Classification (SIC) model was used to code all subsequent injuries based on their Orchard Sports Injury Classification System (OSICS) codes and the dates of injury.
  
  
  RESULTS
  There were 860 newly recorded injuries in 543 players; 247 players (45.5%) sustained ≥1 subsequent injuries after an earlier injury, with 317 subsequent injuries (36.9% of all injuries) recorded overall. A subsequent injury generally occurred to a different body region and was therefore superficially unrelated to an index injury. However, 32.2% of all subsequent injuries were related to a previous injury in the same season. Hamstring injuries were the most common subsequent injury. The mean time between injuries decreased with an increasing number of subsequent injuries.
  
  
  CONCLUSIONS
  When relationships between injuries are taken into account, there is a high level of subsequent (and multiple) injuries leading to missed games in an elite athlete group.
authors.affiliation: Australian Collaboration for Research into Injury in Sport and its Prevention, Federation University Australia, Ballarat, Australia.
authors.forename: Caroline F
authors.initials: CF
authors.lastname: Finch
authors.affiliation: Australian Collaboration for Research into Injury in Sport and its Prevention, Federation University Australia, Ballarat, Australia.|La Trobe Sport and Exercise Medicine Research Centre, La Trobe University, Melbourne, Australia.
authors.forename: Jill
authors.initials: J
authors.lastname: Cook
authors.affiliation: Australian Collaboration for Research into Injury in Sport and its Prevention, Federation University Australia, Ballarat, Australia.
authors.forename: Breanne E
authors.initials: BE
authors.lastname: Kunstler
authors.affiliation: Australian Collaboration for Research into Injury in Sport and its Prevention, Federation University Australia, Ballarat, Australia.
authors.forename: Muhammad
authors.initials: M
authors.lastname: Akram
authors.affiliation: School of Public Health, University of Sydney, Sydney, Australia.
authors.forename: John
authors.initials: J
authors.lastname: Orchard
mesh_terms: D001265:Athletic Injuries / Q000145:classification / Q000453:epidemiology* / Q000209:etiology; D001315:Australia / Q000453:epidemiology; D005538:Football / Q000293:injuries*; D006801:Humans; D011446:Prospective Studies; D012008:Recurrence
keywords: Australian football; hamstring injury; sports medicine diagnoses; subsequent injury; time to injury