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Figure 1. Diagnoses of athletes with shoulder injuries by sport and sex, National High School Sports–Related Injury Surveillance Study, United States, 2005–2006 and 2006–2007 school years. Data are based on weighted national estimates and include competition and practice exposures. a Caution should be used when interpreting national estimates for girls' soccer, because they are based on small case counts and have a relative standard error greater than 30%.