title: An epidemiologic comparison of high school sports injuries sustained in practice and competition.
abstract: BACKGROUND
  More than 7 million US high school students play sports.
  
  
  OBJECTIVE
  To compare practice and competition injury rates and patterns in 5 boys' sports (football, soccer, basketball, wrestling, and baseball) and 4 girls' sports (soccer, volleyball, basketball, and softball) during the 2005-2006 school year.
  
  
  METHODS
  Prospective injury surveillance study.
  
  
  METHODS
  Injury data were collected from 100 nationally representative United States high schools via High School RIO (Reporting Information Online).
  
  
  METHODS
  Athletes from participating high schools injured while participating in a school-sanctioned practice or competition in one of the above sports.
  
  
  METHODS
  Practice and competition injury rates, body site, diagnosis, and severity.
  
  
  RESULTS
  High school athletes participating in these 9 sports at participating schools sustained 4350 injuries during the 2005-2006 school year, which corresponds to an estimated 1 442 533 injuries nationally. The rate of injury per 1000 athlete-exposures was higher in competition (4.63) than in practice (1.69) (rate ratio [RR] = 2.73, 95% confidence interval [CI] = 2.58, 2.90). Of all sports, football had the highest competition (12.09) and practice (2.54) injury rates per 1000 athlete-exposures. Compared with injuries sustained during practice, higher proportions of competition injuries were head/face/neck injuries (proportion ratio [PR] = 1.61, 95% CI = 1.34, 1.94), particularly in boys' soccer (PR = 7.74, 95% CI = 2.53, 23.65) and girls' basketball (PR = 6.03, 95% CI = 2.39, 15.22). Competition injuries were more likely to be concussions (PR = 2.02, 95% CI = 1.56, 2.62), especially in boys' soccer (PR = 6.94, 95% CI = 2.01, 23.95) and girls' basketball (PR = 5.83, 95% CI = 2.06, 16.49). Higher proportions of competition injuries caused the athlete to miss more than 3 weeks of play (PR = 1.28, 95% CI = 1.08, 1.52), particularly in baseball (PR = 3.47, 95% CI = 1.48, 8.11) and volleyball (PR = 2.88, 95% CI = 1.01, 8.24).
  
  
  CONCLUSIONS
  Rates and patterns of high school sport injuries differed between practice and competition. Providing athletic trainers with this information is a crucial step in developing the targeted, evidence-based interventions required to effectively reduce injury rates among the millions of high school student-athletes.
authors.affiliation: The Research Institute at Nationwide Children's Hospital, Columbus, OH 43205, USA.
authors.forename: Julie A
authors.initials: JA
authors.lastname: Rechel
authors.forename: Ellen E
authors.initials: EE
authors.lastname: Yard
authors.forename: R Dawn
authors.initials: RD
authors.lastname: Comstock
mesh_terms: D000293:Adolescent; D000367:Age Factors; D001265:Athletic Injuries / Q000453:epidemiology*; D016021:Epidemiologic Studies; D005260:Female; D006801:Humans; D008297:Male; D011159:Population Surveillance; D011446:Prospective Studies; D012574:Schools; D015599:Trauma Severity Indices; D014481:United States / Q000453:epidemiology