Table 3

Translations and rotations of femoral stems of the direct lateral group, from the day of surgery to 1 year after surgery

Plane	Collared stems, mean ± SD						Collarless stems, mean ± SD						p value

	2 wk	4 wk	6 wk	12 wk	26 wk	52 wk	2 wk	4 wk	6 wk	12 wk	26 wk	52 wk
Translation, mm

x	−0.04 ± 0.14	0.01 ± 0.17	−0.05 ± 0.16	−0.06 ± 0.16	−0.08 ± 0.19	−0.02 ± 0.19	−0.01 ± 0.33	−0.01 ± 0.26	0.02 ± 0.24	0.001 ± 0.20	0.04 ± 0.22	0.01 ± 0.28	0.765

y	−0.20 ± 0.31	−0.23 ± 0.31	−0.20 ± 0.30	−0.25 ± 0.32	−0.16 ± 0.29	−0.23 ± 0.30	−0.08 ± 0.69	−0.21 ± 0.71	−0.19 ± 0.63	−0.23 ± 0.68	−0.29 ± 0.76	−0.23 ± 0.69	0.894

z	−0.13 ± 0.32	−0.04 ± 0.33	−0.24 ± 0.31	−0.19 ± 0.28	−0.10 ± 0.18	0.04 ± 0.27	−0.06 ± 0.42	−0.18 ± 0.27	−0.12 ± 0.36	−0.14 ± 0.41	−0.12 ± 0.32	−0.09 ± 0.38	0.981

Rotation, °

x	0.10 ± 0.38	0.35 ± 0.52	0.07 ± 0.39	0.17 ± 0.44	0.03 ± 0.49	−0.05 ± 0.31	0.30 ± 0.65	0.12 ± 0.59	0.20 ± 0.60	0.20 ± 0.49	0.25 ± 0.56	0.22 ± 0.69	0.638

y	−0.24 ± 0.89	0.17 ± 1.14	−0.59 ± 0.98	−0.49 ± 1.01	−0.64 ± 1.01	−0.43 ± 0.84	−0.40 ± 0.82	−0.56 ± 0.50	−0.83 ± 1.74	−0.58 ± 1.21	−0.88 ± 0.78	−0.55 ± 1.14	0.465

z	−0.18 ± 0.28	−0.24 ± 0.43	−0.21 ± 0.45	−0.13 ± 0.51	−0.15 ± 0.54	−0.06 ± 0.54	0.13 ± 0.18	0.10 ± 0.16	0.06 ± 0.19	0.15 ± 0.20	0.16 ± 0.18	0.11 ± 0.23	0.044

SD = standard deviation.