Radiographic hip involvement is a significant marker of severity in axial spondyloarthritis, affecting nearly 14% of patients in outpatient settings. This condition is associated with poorer functional outcomes and is more prevalent in men and those with longer disease duration.
Researchers analyzed data from 137 patients with confirmed ankylosing spondylitis. Hip involvement, defined by hip pain linked to inflammatory activity and specific radiographic findings, was present in 19 patients. The risk of developing hip involvement increases over time, with projections showing significant percentages of male patients affected after 10 and 20 years of disease duration.
Patients experiencing hip involvement also presented with higher symptomatic disease activity scores and greater structural damage. This finding underscores that hip pain can signal a more aggressive form of axial spondyloarthritis, often manifesting alongside other severe clinical features like uveitis. The study highlights the importance of monitoring hip health in these patients, particularly as the disease progresses.