• Keegan Warner, Jennifer Savage, Christopher M Kuenze, Alexandria Erkenbeck, R Dawn Comstock, and Tracey Covassin.
• Michigan State University, East Lansing.
• J Athl Train. 2018 Nov 1; 53 (11): 1049-1055.

ContextThe sex-based differences in the structure and rules of boys' and girls' lacrosse result in very different styles of play, which may have significant implications for the rates and patterns of injuries.ObjectiveTo compare the epidemiology of injuries sustained by boys' and girls' lacrosse players.DesignDescriptive epidemiology study.SettingWeb-based online surveillance system.Patients Or Other ParticipantsThe High School Reporting Information Online database was used to analyze injuries reported by certified athletic trainers from 2008-2009 through 2015-2016.Main Outcome Measure(S)Practice and competition injury rates, body site, diagnosis, and mechanism.ResultsBoys had a higher injury rate than girls (20.9 versus 15.7 per 10 000 athlete-exposures, respectively; rate ratio = 1.3, 95% confidence interval = 1.2, 1.4). The most commonly injured body sites for boys and girls, respectively, were the lower extremities (38.0%, 56.4%) and the head/neck (28.3%, 29.8%). More specifically, the most frequently diagnosed injuries for both boys and girls, respectively, in competitions were concussions (23.1%, 25.6%), ankle ligament sprains (7.8%, 15.3%), upper leg strains (4.8%, 6.7%), and knee ligament sprains (4.2%, 6.7%). The most cited mechanism of injury overall was contact with another player (22.0%); among boys, it was contact with a stick (14.8%) and among girls, the most frequent mechanisms were overuse (25.0%) and contact with a stick (14.7%).ConclusionsInjury rates and mechanisms of injuries differed between high school boys' and girls' lacrosse players. Boys had a higher rate of injury, with the most common mechanism of injury being contact with another player compared with overuse in girls. However, similarities were seen between sexes for the most frequently injured body sites and injury diagnoses. Future authors should continue to compare differences in injury rates, equipment upgrades, and rule changes in boys' and girls' lacrosse.

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