Table 3

 Preoperative and six and 12 months' postoperative mean scores and (standard deviations) of the three WOMAC subscales for all patients investigated compared with the reference group. The scale is 0–100, worst to best

WOMAC subscale Preop (n=74) 6 m Postop (n=74) 12 m Postop (n=74) Reference group (n=59)
Pain44.8 (17.1)82.6 (16.3)86.3 (15.5)89.1 (18.0)
Stiffness39.3 (15.9)75.0 (16.4)78.4 (19.3)88.2 (16.3)
Physical function39.0 (14.8)74.1 (17.5)78.7 (17.7)85.1 (21.7)