Fig. 1.

Plot of the interaction between eSPPB component complex gait speed (CGS) and lower extremity strength (LES) with BMI for SMN at rest. The color lines represent the relationships between component distances (δCGS and δLES, respectively) on the x-axis and community structure distances (δSMN) on the y-axis for ten discrete BMI distances (δBMI) that are evenly spaced. For plot A, the bottom yellow line shows there is essentially no relationship between δCGS and the community structure when the δBMI is 0. However, as δBMI increases the relationship between δCGS and the community structure increases. The y-intercepts represent the effect of δBMI when the δCGS = 0. Plot B shows that there is a slight positive association between δLES and the community structure when the δBMI is 0. The association increases substantially as δBMI increases, -with maximal slopes that are nearly twice that of δCGS. It is interesting to note that the effect of δBMI when the δLES = 0, the y-intercepts, is not larger than seen in the δCGS. Thus, the main difference between complex gait speed and lower extremity strength in the SMN is the interaction with BMI