Table 4.

Quality-of-life scores preoperatively and at 1-year followup

Scoring system	Overall: hip	Overall: knee
WOMAC function score (points)
Preoperative	49.2 (20; 0–99)	50.5 (19; 9–97)
One year	88.0 (14; 5–100)	81.5 (17; 11.8–100)
Difference	37–41	26–32
WOMAC pain score (points)
Preoperative	49.7 (19; 0–100)	47.9 (20; 0–100)
One year	90.0 (15; 0–100)	83.7 (18; 15–100)
Difference	38–43	33–38
Oxford Hip Score (points)
Preoperative	45.1 (18; 6–100)	43.0 (18; 4–98)
One year	86.5 (16; 14–100)	78.9 (18; 17–100)
Difference	39–44	34–39
SF-12 mental component score (points)
Preoperative	46.8 (12; 18–69)	47.2 (12; 21–69)
One year	54.9 (8; 16–68)	53.1 (10; 17–68)
Difference	7–10	4–8
UCLA activity score
Preoperative	4.5 (2.1; 1–10)	4.1 (1.7; 1–10)
One year	6.3 (2.0; 2–10)	5.6 (1.7; 1–10)
Difference	1.5–2.0	1.3–1.7

Values are expressed as mean, with SD and range in parentheses; differences between preoperative and 1-year scores are expressed as 95% CIs.