Table 2: WOMAC scores.

*WOMAC Subscales Preoperative Postoperative First Year P-value
Pain 17.78±1.66 (14-20) 4.78±2.80 (0-18) <0.001
Stiffness 4.31±1.6 (1-8) 2.84±0.88 (1-5) <0.001
Physical function 58.54±3.26(49-66) 21.82±7.82 (6-52) <0.001

*The WOMAC index [12] is a disease specific measure and includes 24 questions. The questions are grouped into three subscales as pain (20 points), stiffness (8 points), and physical function (68 points). Higher scores demonstrate poor results.