Table 3.

Comparison of range of motion between the two groups.

Preoperative Score (mean ± SD)
Range of Motion (degree)	AVN group	OA group	P-value
Flexion	75.2 ± 7.7	76.2 ± 8.7	0.4
Internal rotation	15.2 ± 5.7	18.2 ± 6.2	0.5
External rotation	22.2 ± 5.6	23.4 ± 5.7	0.5
Abduction	17.2 ± 4.6	17.2 ± 4.3	0.4
Postoperative Score (Difference from the baseline, mean ± SD)
Flexion	119.9 ± 17.7	108.3 ± 15.4	0.01
	(44.7 ± 10.1)	(32.1 ± 9.5)
Internal rotation	40.3 ± 8.0	40.1 ± 10	0.4
	(25.1 ± 6.8)	(67.2 ± 10.1)
External rotation	47.5 ± 4.5	44.3 ± 5.3	0.5
	(25.3 ± 4.1)	(20.8 ± 5.0)
Abduction	50.9 ± 9.6	47.0 ± 10.4	0.04
	(33.7 ± 5.1)	(29.8 ± 6.1)

Abbreviations: AVN; avascular necrosis, OA; osteoarthritis.