Fig. 2

The median value and interquartile range of parameters from the pressure platform and the VIVE tracker-based system were compared between the younger and older groups. Note: Comparison between the younger and older groups with the Mann–Whitney test; * p < 0.05, **p≦0.01, ***p≦0.001. ML = medial–lateral direction; AP = anterior–posterior direction; AREA-CE: 95% confidence ellipse area