Article

French validation of the Foot Function Index (FFI), self-questionnaire
designed to evaluate rheumatoid foot according to 3 domains: pain, disability and
activity restriction. METHODS: The first step consisted of translation/back
translation and cultural adaptation according to the validated methodology. The
second stage was a prospective validation on 53 patients with rheumatoid
arthritis who filled out the FFI. The following data were collected: pain (Visual
Analog Scale), disability (Health Assessment Questionnaire) and activity
restrictions (McMaster Toronto Arthritis questionnaire).
A test/retest procedure
was performed 15 days later. The statistical analyses focused on acceptability,
internal consistency (Cronbach's alpha and Principal Component Analysis),
test-retest reproducibility (concordance coefficients), external validity
(correlation coefficients) and responsiveness to change. RESULTS: The FFI-F is a
culturally acceptable version for French patients with rheumatoid arthritis. The
Cronbach's alpha ranged from 0.85 to 0.97. Reproducibility was correct
(correlation coefficients>0.56). External validity and responsiveness to change
were good. CONCLUSION: The use of a rigorous methodology allowed the validation
of the FFI in the French language (FFI-F). This tool can be used in routine
practice and clinical research for evaluating the rheumatoid foot. The FFI-F
could be used in other pathologies with foot-related functional impairments.
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Langue : ANGLAIS