Article Text

PDF
Decreased incidence of knee posterior cruciate ligament injury in Australian Football League after ruck rule change
  1. J W Orchard1,
  2. H Seward2
  1. 1
    School of Public Health, University of Sydney, Sydney, Australia
  2. 2
    Australian Football League Medical Officers Association, Melbourne, Australia
  1. Correspondence to Dr J W Orchard, Sports Medicine at Sydney University, Cnr Western Ave & Physics Rd, University of Sydney, Sydney, NSW 2006, Australia; jorchard{at}med.usyd.edu.au

Abstract

Objective: To assess whether a rule change introduced in the Australian Football League (AFL) before the start of the 2005 season, to limit the run-up of ruckmen at the centre bounce, has been successful in reducing the incidence of knee posterior cruciate ligament (PCL) injuries

Design: Cohort study with historical control.

Setting: The AFL competition from 1992 to 2008 inclusive.

Assessment of risk factors: The presence of a rule change (four seasons) compared with the previous 13 seasons (divided into two eras of seven and six seasons).

Main outcome measure: Occurrence of knee PCL injury during a regular season or finals match, both from all causes and specifically from centre bounce ruck collision mechanisms.

Results: From 1992 to 1998 there were 11.0 PCL injuries per 10 000 player-hours, with 0.8 ruck injuries per 10 000 centre bounces. From 1999 to 2004, the rates increased to 12.9 per 10 000 player-hours and 5.6 ruck injuries per 10 000 centre bounces (p<0.01). The rates reduced to 5.9 PCL injuries per 10 000 player-hours and 0.9 ruck injuries per 10 000 centre bounces in the period 2005–2008 following the rule change (p<0.01). There was a lower relative risk in 2005–2008 than in 1999–2004 of incurring a centre bounce ruck PCL injury (0.16 (95% CI 0.04 to 0.69)) or of sustaining any PCL injury (0.45 (95% CI 0.28 to 0.75)).

Conclusion: A rule change in the AFL to limit the run-up of ruckmen at the centre bounce has successfully reduced the rate of PCL injuries with this mechanism, with the total incidence of PCL injuries also falling.

Statistics from Altmetric.com

Footnotes

  • ▸ A video can be accessed online only at http://bjsm.bmj.com/content/vol43/issue13

  • Funding The AFL conducts and funds an annual ongoing injury survey recording injuries for all players. JO is a contractor for the AFL in this role. There were no other funding sources.

  • Competing interests The AFL conducts and funds an annual ongoing injury survey recording injuries for all players. JO is a contractor for the AFL in this role. There were no other competing interests.

  • Ethics approval Obtained from the AFL Research Board.

  • Patient consent Obtained.

  • Provenance and Peer review Not commissioned; externally peer reviewed.

Request permissions

If you wish to reuse any or all of this article please use the link below which will take you to the Copyright Clearance Center’s RightsLink service. You will be able to get a quick price and instant permission to reuse the content in many different ways.