title: A prospective evaluation of the Landing Error Scoring System (LESS) as a screening tool for anterior cruciate ligament injury risk.
abstract: BACKGROUND
  Anterior cruciate ligament (ACL) injuries are immediately disabling, costly, take a significant amount of time to rehabilitate, and are associated with an increased risk of developing posttraumatic osteoarthritis of the knee. Specific multiplanar movement patterns of the lower extremity, such as those associated with the drop vertical jump (DVJ) test, have been shown to be associated with an increased risk of suffering noncontact ACL injuries. The Landing Error Scoring System (LESS) has been developed as a tool that can be applied to identify individuals who display at-risk movement patterns during the DVJ.
  
  
  OBJECTIVE
  An increase in LESS score is associated with an increased risk of noncontact ACL injury.
  
  
  METHODS
  Case-control study; Level of evidence, 3.
  
  
  METHODS
  Over a 3-year interval, 5047 high school and college participants performed preseason DVJ tests that were recorded using commercial video cameras. All participants were followed for ACL injury during their sports season, and video data from injured participants and matched controls were then assessed with the LESS. Conditional logistic regression analysis was used to examine the association between LESS score and ACL injury risk in all participants as well as subgroups of female, male, high school, and college participants.
  
  
  RESULTS
  There was no relationship between the risk of suffering ACL injury and LESS score whether measured as a continuous or a categorical variable. This was the case for all participants combined (odds ratio, 1.04 per unit increase in LESS score; 95% confidence interval, 0.80-1.35) as well as within each subgroup (odds ratio range, 0.99-1.14).
  
  
  CONCLUSIONS
  The LESS did not predict ACL injury in our cohort of high school and college athletes.
authors: Department of Orthopaedics and Rehabilitation, McClure Musculoskeletal Research Center, University of Vermont College of Medicinet, Burlington, VT 05405-0084, USA.
authors: Helen C
authors: HC
authors: Smith
authors: Robert J
authors: RJ
authors: Johnson
authors: Sandra J
authors: SJ
authors: Shultz
authors: Timothy
authors: T
authors: Tourville
authors: Leigh Ann
authors: LA
authors: Holterman
authors: James
authors: J
authors: Slauterbeck
authors: Pamela M
authors: PM
authors: Vacek
authors: Bruce D
authors: BD
authors: Beynnon
mesh_terms: D000293:Adolescent; D000070598:Anterior Cruciate Ligament Injuries; D016022:Case-Control Studies; D005260:Female; D006801:Humans; D008297:Male; D012306:Risk; D014741:Video Recording; D055815:Young Adult