Quantification of Trunk Postural Stability Using Convex Polyhedron of the Time-Series Accelerometer Data

Table 1

Spearman’s rank correlation coefficient between the volume of convex polyhedron and the area of the confidence ellipse of COP excursions of control group (CG) and patients (Pts) standing on a firm surface (FiS) and a foam surface (FoS) with eyes open (EO) and eyes closed (EC).

	CG EO	Pts EO	CG EC	Pts EC
FiS	0.03	0.53	0.37	0.93
FoS	0.03	0.83	0.18	0.70