Table 2.

CT scan parameters, preoperative values for both sides (contralateral side for reference) and post-operative values for operated side

n = 65	Contralateral ref. values	Pre THA	Post THA	Mean diff. post vs pre mean [95% CI]	Mean diff. post vs. contralateral mean [95% CI]
Anteversion (°)	33.8 (10.2)	33.7 (10.0)	33.7 (9.6)	0.1 [−1.7, 1.9]	- 0.1 [−3.5, 3.4]
Acetabular offset (mm)	91.9 (5.0)	95.0 (5.2)	89.3 (4.3)	−5.6 [−6.5, −4.8]	- 2.6 [−4.2, −0.9]
Femoral offset (mm)	44.0 (6.2)	43.5 (6.6)	46.7 (6.2)	3.2 [2.2, 4.2]	2.7 [0.6, 4.9]
Global offset (mm)	135.9 (9.2)	138.5 (9.6)	136.1 (8.1)	−2.4 [−3.4, −1.5]	0.2 [− 2.8, 3.2]
FO/AO quota	0.48 (0.06)	0.46 (0.07)	0.52 (0.07)	0.06 [0.05, 0.08]	0.04 [0.02, 0.07]

Pre- and postoperative values are presented as mean (SD). Difference between pre- and postoperative values and between postoperative and contralateral values are presented as mean difference and 95% confidence interval. Statistically significant differences are highlighted in bold

CT computed tomography, CI confidence interval, FO femoral offset, AO acetabular offset