Bath Assessment of Disease Activity Index

The Bath Assessment of Disease Activity Index (BASDAI) is a questionnaire used by healthcare professionals to measure how active and severe ankylosing spondylitis or similar conditions are in a patient. It asks about symptoms like fatigue, back pain, joint stiffness, swelling, and overall well-being. Patients rate how they feel in these areas, helping doctors understand how the disease affects them over time and decide on the best treatment plan. Essentially, BASDAI provides a standardized way to quantify symptom severity and disease activity from the patient's perspective.