LAUSR

Rheumatoid arthritis (RA) is an autoimmune inflammatory disease that affects both small and large joints. Hip involvement is an evolutionary turning point in RA and significantly alters the patient’s quality of life.This study aimed to assess characteristics of RA patients with hip involvement.It was a cross-sectional study, including patients with RA (according to 2010 ACR/European League Against Rheumatism (EULAR) criteria).We divided patients into two groups: G0 patients without hip involvement, G1 patients with hip involvement. Hip involvement was defined with a limited movement during examination with abnormalities on standard radiographs. We collected the following data: age, the disease activity score (DAS28), the inflammatory biomarkers C-reactive protein (CRP) and Erythrocyte sedimentation rate (ESR), Rheumatoid Factor (RF), and Anti Citrullinated Peptides Antibodies (ACPA), and SHARP score (A scoring system used to assess the radiological changes in patients with RA. It describes erosions and narrowing of the joint space of 27 small joints of the hands, including the carpal bones and feet).Among the 224 patients included, 25had hip involvement (11%). The male / female sex-ratio was higher in G1 (0.66 vs 0.22, p=0.017).Patients in G1 were younger at disease onset (44,16±16,11 years vs 51.9±13.9 years, p= 0.022) and had a longer disease duration (12,28 ± 11,49 years vs 6,2010 ± 6,45 years, p=0.02). They had also higher HAQ(1,7692 vs 1,3054, p=0.05).SHARP score was higher in G1 (176.32 vs. 106.88, p=0.011). Atlantoaxial subluxation was more common in G1 (32% vs 14%,p=0.035).When comparing the groups we did not find any significant difference regarding age (56.12 ± 11.88 years vs 58,24±12,26 years, p=0.341), disease activity (DAS28-ESR:5.41 vs. 5.65, p=0.380; DAS28-CRP: 5.19 vs. 5.51, p=0.290), ESR (53.88 vs. 46.95, p=0.237), CRP:23,8894 vs 22,89, p=0.975), and in the serological profile (RF; G1:68% vs G0: 70.8%, p=0.817, ACPA; G1: 60% vs G0:69%, p=0.366).Patients with hip involvement were commonly male, were younger at disease onset and had more functional impairment based on the HAQ score. C1-C2 dislocation wasalso more common in this group.The SHARP score was also significantly higher in G1, which shows a severe and destructive disease.None declared