Bath Ankylosing Spondylitis Disease Activity Index (BASDAI)

The Bath Ankylosing Spondylitis Disease Activity Index (BASDAI) is a questionnaire used by doctors to assess how active and severe ankylosing spondylitis, a type of inflammatory arthritis affecting the spine, is in a patient. It asks about symptoms like fatigue, back pain, stiffness, and swelling over recent days. Patients rate each symptom on a scale, helping doctors understand how the disease impacts daily life and whether treatment is effective. BASDAI provides a standardized way to monitor disease activity and guide management decisions.