The Disease Progression of Chinese Axial Spondyloarthritis in a Real-word Cohort Study

Inclusion Criteria: * Patients aged 18 years or older * Diagnosis of axial spondyloarthritis (axSpA) according to the Assessment of Spondyloarthritis International Society (ASAS) classification criteria Exclusion Criteria: * Presence of severe, unstable medical conditions that may interfere with the study assessments, including but not limited to: End-stage renal disease (eGFR \< 30 mL/min/1.73m²) Severe cardiovascular disease Active malignancy or malignancy requiring ongoing treatment * Current diagnosis of schizophrenia, other psychotic disorders, severe cognitive impairment, or epilepsy with recurrent uncontrolled seizures, which, in the opinion of the investigator, may impair the ability to provide informed consent or comply with follow-up visits. * Pregnant or lactating women