Ankylosing spondylitis is the leader of a group of inflammatory rheumatisms commonly called spondyloarthritis including reactive arthritis, psoriatic arthritis, undifferentiated spondylitis, rheumatism associated with enterocolopathies as well as certain juvenile spondylitis. These pathologies are characterized by common clinical and radiological manifestations such as inflammatory low back pain, damage to entheses and peripheral joints, as well as extra-articular manifestations affecting the skin, heart, eyes and lungs.
The BASFI (Bath ankylosing spondylitis functional index) reflects functional impact, that is to say the inability to perform actions of daily living. For each of the ten activities, you must evaluate from 0 to 10 the ease or difficulty of performing them during the past month. 0 means completely easy, 10 means impossible. This score is an aid in monitoring ankylosing spondylitis.