Factors associated with disability in patients with rheumatoid arthritis.

OBJECTIVE: Analyze disability determinants in a cohort of Argentine patients with rheumatoid arthritis (RA). MATERIAL AND METHODS: Consecutive patients with RA, according to ACR'87 criteria, were recruited from 6 rheumatology centers. Demographic and socioeconomic data, family history, comorbid diseases, extra-articular manifestations and information about received treatments were provided. Disease activity was assessed using Disease Activity Score 28 (DAS 28) and the Health Assessment Questionnaire (HAQ)-A was used for the functional capacity. Hand and feet radiographs were assessed using Sharp-van der Heijde score. RESULTS: A total of 640 patients with RA were included, of which 85.2% were females. Mean age was 53 years (interquartile range [IQR], 44-62) and mean disease duration was 8 years (IQR, 4-14). DAS 28 mean was 2.72 (IQR, 1.7-3.7) and HAQ-A mean was 0.62 (IQR, 0.13-1.25). Multiple linear regression showed that the main variables associated with disability were DAS 28, radiologic damage and age. Main predictors of functional disability in the multiple logistic regression using severe HAQ (>2) as dependent variable were DAS 28 (OR, 2; P < 0.0001); age (OR, 1; P = 0.008); and structural damage (OR, 1; P = 0.001). CONCLUSIONS: In this population, the disease activity was the variable that showed the highest impact on the physical function. Radiologic damage affected HAQ as the disease progressed.

Prevalence and clinical significance of eosinophilia in patients with rheumatoid arthritis in Argentina.

BACKGROUND: The presence of eosinophilia in peripheral blood has been considered by some authors as an indicator of bad prognosis in patients with rheumatoid arthritis (RA); however, the methodology and the number of patients included in those studies were not appropriate. OBJECTIVE: To determine the prevalence and possible causes of eosinophilia in patients with RA, and its relationship with a more severe disease. MATERIAL AND METHODS: Patients with RA (American College of Rheumatology '87) were included, demographic, clinical, and laboratory data were collected. The presence of eosinophilia was defined as an eosinophil absolute count above 350/mm. Disease activity, health assessment questionnaire, and hand x-rays were performed in all patients. A coproparasitologic test and serology for Toxocara by enzyme-linked immunosorbent assay (ELISA) were determined in patients with eosinophilia. RESULTS: One hundred nine patients were included, 95 women (87.2%), mean age 50.6 +/- 13 years, mean disease duration 10.8 +/- 7.6 years. Eight patients (7.33%) showed eosinophilia. When demographic and clinical characteristics of patients with or without eosinophilia were compared, the former showed a higher erythrocyte sedimentation rate levels and significantly more frequency of dry mouth, anal pruritus, and paresthesia. The remaining clinical variables, as well as radiologic structural damage were comparable. Parasites in feces (Ascaris lumbricoides and Enterobius vermicularis) were found in 2 patients with eosinophilia. Seven patients with eosinophilia (87.5%) versus 4 (19%) without eosinophilia showed positive serology for Toxocara (P = 0.001). CONCLUSION: The frequency of eosinophilia in our population of patients with RA was 7.33%. It was not an indicator of severity of the disease and in all cases evidence for secondary causes (parasitosis) was found.