Table 1

 Preoperative and postoperative mean scores and (standard deviations) of the three WOMAC subscales for radiographic moderate (grade 2) and severe (grade 3) osteoarthritis for the 55 patients investigated at all three occasions. The scale is 0–100, worst to best

WOMAC subscale Preop Grade 2 (n=19) Preop Grade 3 (n=36) 6 m Postop Grade 2 (n=19) 6 m Postop Grade 3 (n=36) 12 m Postop Grade 2 (n=19) 12 m Postop Grade 3 (n=36)
Pain40.8 (12.8)48.0 (18.1)83.6 (16.1)81.7 (17.4)88.3 (15.1)86.2 (14.7)
Stiffness39.5 (16.3)38.9 (16.3)75.0 (14.0)75.0 (17.7)80.6 (17.3)77.0 (20.6)
Physical function37.0 (11.8)40.6 (16.5)73.4 (18.1)73.7 (18.4)80.4 (17.6)80.0 (17.4)