Statistical analysis
Data were analyzed using predictive analytic software (IBM Predictive Analytic Software, Armonk, NY), the alpha level for statistical significance was set at .05 for all analyses. Chi-squared tests were used to assess the association of both compulsory (school) and noncompulsory sport and exercise participation with the following variables: breast size, school year, the frequency of sports bra use, and breast-specific concerns in relation to sport and exercise.