Fig. 2.

Summary showing the different statistical analyses applied to create a new variable to better describe functional physical performance in the elderly. After applying the PCA, we obtained two components to describe the functional physical performance of the upper (component 1) or lower (component 2) body limbs, as detailed in Fig. 1. The subjects were then classified in two groups (poor or good physical performance) using cluster analysis according to the extreme values reached by the specific variables included in each component of the PCA. After combining both clusters of each component derived from the PCA, we classified our study population according to a new variable with four categories, describing different levels of functional physical performance: poor general physical performance, poor physical performance of lower body limbs, poor physical performance of upper body limbs, and good general physical performance