title: Descriptive Epidemiology of Non-Time-Loss Injuries in Collegiate and High School Student-Athletes.
abstract: BACKGROUND
  Research on non-time-loss (NTL) injuries, which result in less than 24 hours of restriction from participation, is limited.
  
  
  OBJECTIVE
  To describe the epidemiology of NTL injuries among collegiate and high school student-athletes.
  
  
  METHODS
  Descriptive epidemiology study.
  
  
  METHODS
  Aggregate injury and exposure data collected from a convenience sample of National College Athletic Association varsity teams and 147 high schools in 26 states.
  
  
  METHODS
  Collegiate and high school student-athletes participating in men's and boys' baseball, basketball, football, lacrosse, soccer, and wrestling and women's and girls' basketball, field hockey, lacrosse, soccer, softball, and volleyball during the 2009-2010 through 2013-2014 and the 2011-2012 through 2013-2014 academic years, respectively, participated. Collegiate student-athletes participating in men's and women's ice hockey were also included.
  
  
  METHODS
  Injury data from the National Collegiate Athletic Association Injury Surveillance Program and the National Athletic Treatment, Injury and Outcomes Network were analyzed. Injury counts, rates per 1000 athlete-exposures (AEs), and rate ratios were reported with 95% confidence intervals (CIs).
  
  
  RESULTS
  A total of 11 899 and 30 122 NTL injuries were reported in collegiate and high school student-athletes, respectively. The proportion of NTL injuries in high school student-athletes (80.3%) was 1.61 times greater than that of collegiate student-athletes (49.9%; 95% CI = 1.59, 1.63). The NTL injury rate in high school student-athletes (8.75/1000 athlete-exposures [AEs]) was 2.18 times greater than that of collegiate student-athletes (4.02/1000 AEs; 95% CI = 2.13, 2.22). Men's ice hockey (5.27/1000 AEs) and boys' football (11.94/1000 AEs) had the highest NTL injury rates among collegiate and high school athletes, respectively. Commonly injured body parts in collegiate and high school student-athletes were the hip/thigh/upper leg (17.5%) and hand/wrist (18.2%), respectively. At both levels, contusions, sprains, and strains were the most frequent diagnoses. Contact with another player was the most cited injury mechanism (college = 38.0%, high school = 46.3%).
  
  
  CONCLUSIONS
  Non-time-loss injuries compose large proportions of collegiate and high school sports injuries. However, the NTL injury rate was higher in high school than in collegiate student-athletes. Tracking NTL injuries will help to better describe the breadth of injuries sustained by athletes and managed by athletic trainers.
authors.affiliation: Department of Exercise and Sport Science, University of North Carolina at Chapel Hill.
authors.forename: Zachary Y
authors.initials: ZY
authors.lastname: Kerr
authors.affiliation: Human Movement Science Curriculum, University of North Carolina at Chapel Hill.
authors.forename: Robert C
authors.initials: RC
authors.lastname: Lynall
authors.affiliation: Datalys Center for Sports Injury Research and Prevention, Inc, Indianapolis, IN.
authors.forename: Karen G
authors.initials: KG
authors.lastname: Roos
authors.affiliation: Datalys Center for Sports Injury Research and Prevention, Inc, Indianapolis, IN.
authors.forename: Sara L
authors.initials: SL
authors.lastname: Dalton
authors.affiliation: Datalys Center for Sports Injury Research and Prevention, Inc, Indianapolis, IN.
authors.forename: Aristarque
authors.initials: A
authors.lastname: Djoko
authors.affiliation: Datalys Center for Sports Injury Research and Prevention, Inc, Indianapolis, IN.
authors.forename: Thomas P
authors.initials: TP
authors.lastname: Dompier
mesh_terms: D000293:Adolescent; D056352:Athletes / Q000706:statistics & numerical data; D001265:Athletic Injuries / Q000145:classification / Q000453:epidemiology; D005260:Female; D006801:Humans; D015994:Incidence; D008297:Male; D011159:Population Surveillance; D012574:Schools / Q000706:statistics & numerical data; D013177:Sports / Q000145:classification; D013334:Students / Q000706:statistics & numerical data; D014481:United States / Q000453:epidemiology; D014495:Universities / Q000706:statistics & numerical data; D055815:Young Adult
keywords: injury incidence; injury surveillance; sports