title: A systematic review of prophylactic braces in the prevention of knee ligament injuries in collegiate football players.
abstract: OBJECTIVE
  To determine the relative risk reduction associated with prophylactic knee braces in the prevention of knee injuries in collegiate football players.
  
  
  METHODS
  An exhaustive search for original research was performed using the PubMed, SportDiscus, and CINAHL databases from 1970 through November 2006, with the search terms knee brace, knee braces, knee bracing and football, prophylactic brace, and prophylactic knee braces.
  
  
  METHODS
  Seven studies comparing knee injuries among braced and non-braced collegiate football players were included. Study methods were assessed using the Physiotherapy Evidence Database (PEDro) scale. PEDro scores ranged from 2 to 5.
  
  
  METHODS
  The number of participants and frequency of knee injuries were used to calculate the relative risk reduction or increase.
  
  
  RESULTS
  We found a relative risk reduction for 3 studies with point estimates of 10% (36% to -26%), 58% (25% to 76%), and 56% (13% to 77%). Four studies demonstrated an increased risk of injury, with point estimates of 17% (19% to -71%), 49% (-31% to -69%), 114% (23% to -492%), and 42% (-18% to -70%).
  
  
  CONCLUSIONS
  Data from existing research are inconsistent. Based on a Strength of Recommendation Taxonomy level of evidence of 2 with a grade B recommendation, we cannot conclusively advocate or discourage the use of prophylactic knee braces in the prevention of knee injuries in collegiate football players.
authors.affiliation: University of Virginia, Charlottesville, VA 22904, USA. bgp7a@virginia.edu
authors.forename: Brian G
authors.initials: BG
authors.lastname: Pietrosimone
authors.forename: Terry L
authors.initials: TL
authors.lastname: Grindstaff
authors.forename: Shelley W
authors.initials: SW
authors.lastname: Linens
authors.forename: Elizabeth
authors.initials: E
authors.lastname: Uczekaj
authors.forename: Jay
authors.initials: J
authors.lastname: Hertel
mesh_terms: D001915:Braces; D019992:Databases as Topic; D005538:Football / Q000293:injuries*; D006801:Humans; D007718:Knee Injuries / Q000517:prevention & control*; D011322:Primary Prevention / Q000379:methods*; D012306:Risk; D012307:Risk Factors; D014495:Universities