Introduction: Ankylosing spondylitis (AS) is a chronic inflammatory disease, part of the spondyloarthritis (SpA) group, characterized by axial (spine and sacroiliac joints), entheseal, and peripheral joint involvement, which is frequently associated with extra-articular manifestations.
Material and methods: The study included a number of 30 patients diagnosed with AS according to the New York modified criteria, with history of entheseal pain, hospitalized between 2016-2018 in the Department of Rheumatology of the Emergency County Hospital of Craiova.
Results: Regarding the Belgrade Ultrasound Enthesitis Score (BUSES) score and the disease activity calculated using the Ankylosing Spondylitis Disease Activity Score (ASDAS), they did not show a statistically significant association (p = 0.738). Additionally, BUSES did not have a statistically significant association with the disease activity quantified by the Bath Ankylosing Spondylitis Disease Activity Index (BASDAI) score (p = 0.094). The Spondyloarthritis Research Consortium of Canada Enthesitis Index (SPARCC) clinical score was not statistically associated with ASDAS (p = 0.434) nor with BASDAI (p = 0.130). The SPARCC clinical score and the BUSES ultrasound score were statistically significantly associated, registering a value of p = 0.018.
Conclusions: Our study proved a significant correlation between SPARCC and BUSES, although in literature the evidence is contrasting.
Keywords: BUSES; SPARCC; enthesitis; musculoskeletal ultrasound.