Table 2.

Radiological examination: postoperative positioning and orientation.

	STD	MIS	P
Mean change of position Medially (SD) Range (mm)	-1.7 4 -12.2 to 9.7	-1.9 3.6 -12.4 to 6.5	0.669
Mean change of position Cranially (SD) Range (mm)	0.9 4.1 -10.3 to 12.8	1.5 3.7 -7.3 to 11.4	0.190
Mean inclination (SD) Range (°)	37.7 (6.8) 18.3 to 55.3	39.8 (5.9) 24.9 to 52	0.011
Mean anteversion (SD) Range (°)	23.7 (7.5) 7 to 42	21.8 (8) 1 to 42	0.056

Change of position (medially and cranially) and cup orientation (inclination and anteversion) for the STD group and the MIS group (unpaired t-test). 95% CI for group differences for orientation: inclination, -3.8 to -0.5; anteversion, -0.1 to 3.8.