Mylène Jansen

66 Chapter 4 Patient-reported outcome measures As primary outcome, a clear and clinically significant improvement in total WOMAC score (Figure 1) was present 2 years after treatment for all 4 groups (KJD TKA Δ39; TKA Δ42; KJD HTO Δ27; HTO Δ34; all p< 0.001). Figure 1 : Total Western Ontario and McMaster Universities Osteoarthritis index (WOMAC). (A)WOMAC score over 2 years for the subgroups indicated for total knee arthroplasty (TKA) and treated with knee joint distraction (KJD TKA ) or TKA, represented as mean ± standard error of the mean (SEM). (B) Two-year change inWOMAC score for individual TKA-indicated patients (markers) and the subgroups (mean ± SEM, dashes). (C) Total WOMAC score 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 WOMAC score 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.