Table 4.

Mean (SD) translation (mm) of the polyethylene liner, derived from 2 measurement methods, and the precision of the measurements as defined by the mean (SD) × t

Segments / Plane	Mean liner motion (SD)	Precision	Precision interval
Liner to shell (n = 45)
x	−0.025 (0.147)	0.211	−0.221 to 0.201
y	−0.039 (0.160)	0.193	−0.187 to 0.199
z	−0.029 (0.428)	0.654	−0.690 to 0.619
Liner to pelvis (n = 44)
x	−0.010 (0.211)	0.161	−0.163 to 0.159
y	0.101 (0.174)	0.105	−0.109 to 0.102
z	−0.017 (0.287)	0.457	−0.478 to 0.436