TABLE II.

Utility Changes After Hip Arthroplasty Procedures

	EQ-5D				SF-6D
	Preop.	2-Yr Postop.	P Value (2-Yr vs. Preop.)	2-Yr Change	Preop.	2-Yr Postop.	P Value (2-Yr vs. Preop.)	5-Yr Postop.	P Value (5-Yr vs Preop.)	2-Yr Change	5-Yr Change
Primary total hip arthroplasty
No. of patients	5,353	3,514		3,453	5,154	5,076		3,785		4,834	3,601
Score*	0.63 ± 0.19	0.88 ± 0.14	<0.0001	0.25 ± 0.20	0.6 ± 0.11	0.79 ± 0.13	<0.0001	0.81 ± 0.13	<0.0001	0.18 ± 0.13	0.2 ± 0.13
Hip resurfacing
No. of patients	829	576		566	807	814		637		782	611
Score*	0.68 ± 0.16	0.93 ± 0.11	<0.0001	0.24 ± 0.17	0.63 ±0.10	0.82 ± 0.12	<0.0001	0.84 ± 0.12	<0.0001	0.19 ± 0.13	0.21 ± 0.12
Aseptic revision total hip arthroplasty
No. of patients	434	292		287	411	399		268		380	254
Score*	0.63 ± 0.22	0.8 ± 0.17	<0.0001	0.17 ± 0.23	0.6 ± 0.12	0.72 ± 0.14	<0.0001	0.74 ± 0.15	<0.0001	0.12 ± 0.14	0.14 ± 0.15
Septic revision total hip arthroplasty
No. of patients	3	4		3	3	3		2		2	1
Score*	0.58 ± 0.35	0.72 ± 0.19	0.52	0.13 ± 0.51	0.64 ± 0.03	0.69 ± 0.05	0.21	0.62 ± 0.05	0.60	0.04 ± 0.03	0.04
Conversion of hemiarthroplasty to total hip arthroplasty
No. of patients	23	18		17	23	24		13		23	13
Score*	0.64 ± 0.15	0.78 ± 0.18	0.0098	0.13 ± 0.18	0.63 ± 0.11	0.71 ± 0.12	0.022	0.75 ± 0.13	0.0058	0.09 ± 0.1	0.09 ± 0.13
Conversion of hip resurfacing to total hip arthroplasty
No. of patients	12	5		5	11	12		9		11	8
Score*	0.67 ± 0.18	0.93 ± 0.1	0.0089	0.18 ± 0.13	0.59 ± 0.10	0.74 ± 0.16	0.015	0.79 ± 0.17	0.0042	0.13 ± 0.13	0.16 ± 0.11

^*The scores are given as the mean and the standard deviation. The p values were determined with use of the Student t test.