This thesis showed that there appears much room for improvement in optimizing physical activity and exercise of people with axial spondyloarthritis (axSpA), both in patients using and not using... Show moreThis thesis showed that there appears much room for improvement in optimizing physical activity and exercise of people with axial spondyloarthritis (axSpA), both in patients using and not using individual physical therapy and axSpA-specific group exercise. Although recommended, only a minority engages in high-intensity aerobic physical activity and in strengthening and mobility exercise with the recommended frequency. This is also the case in people with axSpA using physical therapy. Furthermore, certain evidence-based enhancements in axSpA-specific exercise groups seem warranted. A pilot implementation of these enhancements was found to be partially successful and a number of barriers remain to be overcome in a larger-scale implementation. Because only a small minority of people with axSpA participate in such exercise groups, it is also desired to implement modifications to individual physical therapy as well as interventions in which people with axSpA can participate independently (without supervision). A number of components of such interventions were identified in this thesis. Show less
The first section of this thesis aims to provide an international perspective on the characterisation of patients with axial spondyloarthritis. Through different aspects of the classification... Show moreThe first section of this thesis aims to provide an international perspective on the characterisation of patients with axial spondyloarthritis. Through different aspects of the classification criteria, we review the importance of global applicability of these criteria. As classification criteria ensure the same patients are selected for participation in clinical trials worldwide, global applicability would allow for direct comparisons between studies executed in different geographical regions. Likewise, standardised assessment and reporting of results from clinical trials allows for direct comparisons between studies investigating different treatments, or identical treatments in populations from a different ethnicity or background, which is debated in the second part of this thesis. Herein, we describe the process of the development of the core set for axial spondyloarthritis, specifically by updating the domains of the ASAS-OMERACT core set for ankylosing spondylitis. In the final part of this thesis, we discuss health-related quality of life and work and activity impairments in patients with chronic back pain suspected of axial spondyloarthritis. Show less
