Table 3.

Mean and standard deviation values of the error patterns of the knee kinematics reported in Figure 5.

pose estimator	flexion [deg]	abduction [deg]	internal [deg]	anterior [mm]	proximal [mm]	medial [mm]
geometric	-2.3 (2.0)	-0.3 (2.4)	0.6 (2.3)	-3.6 (2.8)	-0.6 (1.0)	-6.5 (4.5)
SVD 4-markers	-0.6 (2.2)	-1.0 (1.8)	-0.7 (2.4)	1.1 (3.6)	1.9 (3.0)	-0.8 (1.8)
SVD 12-markers	-1.7 (0.7)	0.1 (0.4)	-0.4 (1.7)	3.4 (2.4)	0.6 (2.3)	1.8 (2.0)
PCTu 4-markers	0.5 (3.6)	-1.3 (1.9)	-1.1 (2.9)	-3.2 (7.1)	-0.5 (1.9)	6.7 (3.4)
PCTu 12-markers	1.0 (2.4)	1.5 (1.3)	-0.8 (2.9)	1.5 (5.6)	-0.2 (3.8)	5.1 (3.9)
PCTa 12-markers	-2.3 (3.7)	-0.2 (1.7)	-2.5 (2.8)	-1.2 (7.4)	0.2 (4.3)	5.6 (6.1)