Figure 2. Univariate linear regression lines between age and physical performance (A–F) in men and women.

Univariate linear regression analysis showed significant associations between age and all physical performance measures in both sexes (all P<0.001). A =  hand-grip strength, B =  one-legged balance with eyes open, C =  usual gait speed, D =  usual gait step length, E =  maximum gait speed, and F =  maximum gait step length.