ASAS classification criteria

The ASAS classification criteria are used to diagnose different types of inflammatory back pain, particularly in conditions like ankylosing spondylitis. These criteria focus on identifying key symptoms such as chronic back pain that improves with exercise and worsens at rest. They also take into account personal and family medical history, the age of onset, and specific imaging findings, like changes in the sacroiliac joints seen on X-rays. The goal is to accurately classify and identify patients who may have these conditions to guide effective treatment.