Abstract

BANDE, J.M. et al. Validation of the Functional Index for Hand Osteoarthritis (FIHOA) in patients with rheumatoid arthritis. Rev. argent. reumatolg. [online]. 2019, vol.30, n.3, pp.22-25. ISSN 0327-4411.

FIHOA was developed to evaluate the functional capacity of patients with OA hands. Objetive: To validate FIHOA in patients with RA. Methods: Analytical, observational, prospective cross-sectional study. Consecutive patients with diagnosis of RA (ACR/EULAR 2010) were included. Demographic and RA characteristics were recorded. Patients completed the following self-administered questionnaires: FIHOA, HAQ-A, HAQ-UP-A and Quick DASH. For a patient subgroup, an occupational therapist performed an objective evaluation of the functional capacity of the hands using the SODA-A. Reproducibility was assessed. Statistical analysis: Descriptive statistics. Reliability with the Cronbach test. Construct validity with Spearman correlation. Reproducibility with test-retest reliability. Linear regression model. Results: One hundred patients were included. Cronbach's alpha test was 0.94. There were no redundant questions. FIHOA showed an excellent correlation with HAQ-A (r=0.89); HAQ-UP-A (r=0.89); Quick DASH (r=0.90) and SODA-A (r=-0.80); and a good correlation with DAS28-ERS (r=0.65) and with other disease parameters. Questionnaire reproducibility was 0.73. A multiple linear regression showed morning stiffness as the main determinant of FIHOA, followed by glucocorticoid use and patient global assessment. Conclusion: FIHOA was found to be reliable, valid and reproducible in patients with RA.

Keywords : functional index; hand osteoarthritis; rheumatoid arthritis.

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