Prevalence of Coxitis and its Correlation with Inflammatory Activity in Rheumatoid Arthritis
BACKGROUND: Rheumatoid arthritis (RA) is an autoimmune inflammatory disease characterised by intra-articular and extra-articular manifestations but very rarely with coxitis.
AIM: This study aimed to investigate the prevalence of coxitis, clinical changes, and its correlation with the parameters of inflammatory activity.
METHODS: A cohort of 951 patients diagnosed with ACR/EULAR (American College of Rheumatology/European League against Rheumatism) 2010 criteria was enrolled in this prospective, observational and analytic research study. The CBC (Complete Blood Count), ESR (Erythrocyte sedimentation rate), CRP(C - reactive protein), Anti CCP (Antibodies to cyclic citrullinated peptides), X-ray examination of palms and pelvis, and the activity of the disease as measured by DAS - 28 (28 - joint disease activity score) were carried out in all subjects. Independent samples t-test was used to compare the group's characteristics, whereas Pearson correlation test was used to analyse the correlation between study variables.
RESULTS: Of the total number of the subjects, 730 (76.8 %) were females, whereas 221 (23.2%) were males. The average age was 51.3, y/o while the most of them were between 40 - 49 y/o (32.6%). The prevalence of coxitis was 14.2%, mostly found in males (19.46%). The echosonografic prevalence of changes was 21.45%, while the radiological changes were 16.3%; in both cases, the changes were more expressed in males. The analysis showed that inflammatory parameters were significantly higher in patients with coxitis.CONCLUSION: Coxitis has high economic cost because it ends up with a mandatory need for a total hip joint prosthesis. Thus the results of this study can serve to plan and initiate early preventive measures.
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