Table 1. The mean and standard deviation of movement of pelvic center points (unit: mm).

	Before	After
Sagittal	5.76 ± 2.46	4.20 ± 2.15
Coronal	4.16 ± 2.96	2.69 ± 1.46
Axial	1.89 ± 0.92	1.55 ± 0.92