Mylène Jansen

120 Chapter 6 Figure 4 : One-year change in Western Ontario and McMaster Universities Osteoarthritis Index for patients treated with knee joint distraction, for (A) the total score, and (B) the pain, (C) stiffness, and (D) function subscales for patients treated with knee joint distraction in regular care and in OPS/RCT clinical trials (OPS: open prospective study; RCT: randomized controlled trial). P- values above groups indicate significant changes at 1 year compared to baseline while p- values between groups indicate the significance of differences between groups, corrected for baseline values and distraction duration. Bold p- values indicate statistical significance ( p< 0.05). Each dot represents a patient (for trial patients: triangles represent OPS patients and circles RCT patients); bars represent mean and 95% confidence interval.