• Aaron M Gray and William L Buford.
• Department of Orthopaedic Surgery and Rehabilitation, University of Texas Medical Branch, Galveston.
• J Athl Train. 2015 Nov 1; 50 (11): 1190-8.

ContextKnee injuries account for a substantial percentage of all athletic injuries. The relative rates of knee injury for a variety of sports by sex and age need to be understood so we can better allocate resources, such as athletic trainers, to properly assess and treat injuries and reduce injury risk.ObjectiveTo describe the epidemiology of patients with sport-related knee strain and sprain presenting to US emergency departments from 2002 to 2011.DesignCross-sectional study.SettingUsing the Consumer Products Safety Commission's National Electronic Injury Surveillance System and the US Census Bureau, we extracted raw data to estimate national rates of patients with knee strain and sprain presenting to emergency departments.Patients Or Other ParticipantsParticipants were individuals sustaining a knee strain or sprain at sports or recreation venues and presenting to local emergency departments for treatment. We included 12 popular sports for males and 11 for females. Ages were categorized in six 5-year increments for ages 5 to 34 years and one 10-year increment for ages 35 to 44 years.Main Outcome Measure(S)Incidence rates were calculated using weights provided by the National Electronic Injury Surveillance System and reported with their 95% confidence intervals for sport, sex, and age.ResultsStrain and sprain injury rates varied greatly by sport, sex, and age group. The highest injury rates occurred in football and basketball for males and in soccer and basketball for females. The most at-risk population was 15 to 19 years for both sexes.ConclusionsAthletes experience different rates of knee strain and sprain according to sport, sex, and age. Increased employment of athletic trainers to care for the highest-risk populations, aged 10 to 19 years, is recommended to reduce emergency department use and implement injury-prevention practices.

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