Table 2.

Loadings of resulting PCs in the PCA performed on each sample. H and P stand for healthy subjects and HOA patients, respectively. For easier interpretation, loadings greater than 0.3 (weak) and 0.5 (strong) are highlighted in light and dark grey, respectively, similarly as in [42]. The last row shows the variance explained by each PC.

		Healthy Subjects					HOA Patients
Joint	Movement	HPC1	HPC2	HPC3	HPC4	HPC5	PPC1	PPC2	PPC3	PPC4	PPC5
CMC1	Flexion	−0.019	0.109	0.847	0.064	−0.007	−0.016	−0.210	−0.478	−0.115	−0.661
	Abduction	0.387	0.046	0.336	0.499	0.431	0.285	0.099	0.067	0.819	−0.083
MCP1	Flexion	0.089	0.126	0.013	−0.831	0.148	0.188	0.128	0.014	0.082	−0.655
IP1	Flexion	0.114	0.012	−0.571	0.534	0.085	−0.020	0.018	−0.402	0.058	0.476
MCP2	Flexion	0.265	0.728	0.446	−0.064	0.098	0.850	0.165	0.012	0.027	−0.259
MCP3	Flexion	0.333	0.830	0.245	−0.054	0.127	0.916	0.150	−0.072	0.041	−0.102
MCP4	Flexion	0.431	0.823	0.001	0.014	−0.003	0.872	0.202	−0.272	−0.013	0.082
MCP5	Flexion	0.537	0.696	−0.140	0.081	−0.115	0.664	0.226	−0.595	0.089	0.019
PIP2	Flexion	0.633	0.182	−0.028	0.173	0.193	0.183	0.653	0.107	0.050	0.096
PIP3	Flexion	0.934	0.044	−0.045	0.032	0.005	0.106	0.907	−0.014	0.146	0.049
PIP4	Flexion	0.939	0.115	0.011	−0.014	−0.050	0.127	0.934	−0.056	0.073	−0.078
PIP5	Flexion	0.841	0.120	0.038	−0.105	−0.094	0.050	0.873	−0.039	−0.029	−0.103
MCP2−3	Abduction	0.240	−0.622	−0.220	0.112	−0.060	−0.508	0.062	0.012	0.497	0.363
MCP3−4	Abduction	0.191	−0.647	0.199	0.102	0.249	−0.460	0.114	0.308	0.609	0.052
MCP4−5	Abduction	−0.311	−0.521	0.260	−0.129	0.300	−0.171	−0.055	0.817	0.043	0.171
PArch	Flexion	−0.049	−0.064	−0.071	−0.085	0.901	−0.107	0.086	0.693	0.211	−0.132
Variance explained (%)		24.26	22.20	10.00	8.32	7.94	21.60	19.52	13.05	8.74	8.71