Table 2.

Summary of improvement in mean HHS, HOOS, PMA, UCLA, and VAS pain scores throughout the entire 24-month follow-up period.

Outcome	Statistic	Baseline	3 Months	6 Months	12 Months	24 Months
HHS Total Score (0–100)	N	52	50	49	48	48
	Mean (SD)	54.5 (10.5)	88.6 (14.1)	94.0 (9.6)	96.2 (7.7)	96.6 (7.8)
	P value for change from baseline	–	<0.001	<0.001	<0.001	<0.001
HOOS (0–96)	N	52	50	48	48	48
	Mean (SD)	54.4 (15.8)	20.8 (14.0)	16.3 (15.5)	10.3 (9.8)	10.4 (11.5)
	P value for change from baseline	–	<0.001	<0.001	<0.001	<0.001
PMA (0–18)	N	52	50	49	48	48
	Mean (SD)	12.1 (1.9)	16.0 (2.2)	17.0 (1.4)	17.2 (1.3)	17.4 (1.3)
	P value for change from baseline	–	<0.001	<0.001	<0.001	<0.001
UCLA activity level (0–10)	N	52	50	49	48	48
	Mean (SD)	5.2 (2.1)	6.2 (1.8)	6.9 (1.7)	7.0 (1.7)	6.9 (1.6)
	P value for change from baseline	–	0.0132	<0.001	<0.001	<0.001
VAS pain score (0–100)	N	52	50	48	48	48
	Mean (SD)	64.1 (21.5)	19.7 (19.0)	13.8 (16.8)	10.1 (9.5)	12.0 (13.4)
	P value for change from baseline	–	<0.001	<0.001	<0.001	<0.001

Abbreviations: HHS = Harris Hip Score; HOOS = Hip Disability and Osteoarthritis Outcome; PMA = Postel Merle d’Aubigné-Score; SD = standard deviation; UCLA = University of California, Los Angeles scale; VAS = Visual Analogue Scale.