Fig. 3

The graphs illustrate the associations between BMI and age with GG. In the graphs on the top row, the red color family designates the quadriceps, and the blue color family designates the hamstrings. The graph (bottom row) demonstrates statistically significant interactions between BMI and sex on GG grade (p = 0.029), suggesting that the effects of BMI on GG grade vary by sex. Error bars represent 95% CIs.