Mylène Jansen

70 Chapter 4 Radiographic evaluation KJD versus TKA In the KJD TKA group, the minimum JSW increased significantly from 0.49 (SEM 0.27) mm at baseline to 1.55 (0.30) mm at 2 years ( p= 0.002) while the mean JSW of the MAC increased from 1.69 (0.50) mm to 2.70 (0.42) mm at 2 years ( p= 0.009), as shown in Figure 3. In the TKA group the JSW was not measured, since patients no longer had their native knee. Figure 3 : Joint space width (JSW). (A) Mean and minimum JSW over 2 years for the subgroup indicated for total knee arthroplasty (TKA) and treated with knee joint distraction (KJD TKA ), represented as mean ± standard error of the mean (SEM). (B) Two-year change in minimum JSW for individual TKA-indicated patients (markers) and the subgroup (mean ± SEM, dashes). (C) Mean and minimum JSW over 2 years for the subgroups indicated for high tibial osteotomy (HTO) and treated with KJD (KJD HTO ) or HTO, represented as mean ± SEM. (D) Two- year change in minimum JSW for individual HTO-indicated patients (markers) and the subgroups (mean ± SEM, dashes). The p- values above subgroups indicate significant 2-year changes while the p- values between subgroups indicate the differences between each 2 groups.