TABLE 2.

Accuracy of the surgical plan and radiographic outcome.

	AIHIP (n = 60)		Control (n = 60)		P-value
	Mean	Std	Mean	Std
Mean absolute error between preoperative planning and postoperative results
Cup size	0.73	1.10	2.53	1.6	<0.001
Stem size	0.48	0.57	1.07	0.88	<0.001
Neck length (mm)	5.49	4.40	6.13	3.16	0.813
Calcar length (mm)	3.92	2.79	4.51	2.96	0.249
Changes between preoperative and postoperative offset
Femoral offset (mm)	4.41	3.99	6.91	5.08	0.001
Acetabular offset (mm)	5.83	4.29	4.59	3.55	0.163
Global offset (mm)	7.33	5.04	7.44	5.40	0.919
Postoperative leg length discrepancy
LLD (mm)	5.03	3.67	5.68	4.06	0.360

Confounding variables including age, gender, BMI and primary diagnosis were considered and none of them are factors with significant influence on the results.