Enteropathic arthritis in Brazil: data from the Brazilian registry of spondyloarthritis

AbstractInflammatory bowel diseases (Crohn's disease and ulcerative rectocolitis) have extraint- estinal manifestations 25% of the patients, with the most common one being the entero- pathic arthritis.MethodsProspective, observational, multicenter study with patients from 29 reference cen- ters participating in the Brazilian Registry of Spondyloarthritis (RBE), which incorporates the RESPONDIA (Ibero-American Registry of Spondyloarthritis) group. Demographic and clinical data were collected from 1472 patients and standardized questionnaires for the as- sessment of axial mobility, quality of life, enthesitic involvement, disease activity and func- tional capacity were applied. Laboratory and radiographic examinations were performed. The aim of this study is to compare the clinical, epidemiological, genetic, imaging, treat- ment and prognosis characteristics of patients with enteropathic arthritis with other types of spondyloarthritis in a large Brazilian cohort.ResultsA total of 3.2% of patients were classified as having enteroarthritis, 2.5% had spon- dylitis and 0.7%, arthritis (peripheral predominance). The subgroup of individuals with en- teroarthritis had a higher prevalence in women (P < 0.001), lower incidence of inflammatory axial pain (P < 0.001) and enthesitis (P = 0.004). HLA-B27 was less frequent in the group with enteroarthritis (P = 0.001), even when considering only those with the pure axial form. There was a lower prevalence of radiographic sacroiliitis (P = 0.009) and lower radiographic score (BASRI) (P = 0.006) when compared to patients with other types of spondyloarthritis. They also used more corticosteroids (P < 0.001) and sulfasalazine (P < 0.001) and less non- steroidal anti-inflammatory drugs (P < 0.001) and methotrexate (P = 0.001).ConclusionThere were differences between patients with enteroarthritis and other types of spondyloarthritis, especially higher prevalence of females, lower frequency of HLA-B27, associated with less severe axial involvement