Figure 3From: Baseline new bone formation does not predict bone loss in ankylosing spondylitis as assessed by quantitative computed tomography (QCT) - 10-year follow-up Radiographic grading at baseline and follow-up according to Devogelaer [9]. Digits represent number of patients in each grade at baseline and follow-up. Thickness of lines is proportional to numbers of patients. Embodied is a Devogelaer X-ray grading.Back to article page