Translation and cultural adaptation of the revised foot function index for the Portuguese language: FFI-R Brazil.

BACKGROUND The revised foot function index (FFI-R) is used to evaluate the functionality of patients with conditions that affect the feet. The objective here was to produce the Brazilian Portuguese version of this index. DESIGN AND SETTING Translation and validation study conducted at the Federal University of São Paulo, Brazil. METHODS The translation and cultural adaptation process involved translation by two independent translators, analysis by an expert committee, back translation into the original language, analysis by the expert committee again and a pretest. The Portuguese-language version was administered to 35 individuals with plantar fasciitis and metatarsalgia to determine their level of understanding of the assessment tool. RESULTS Changes were made to the terms and expressions of some original items to achieve cultural equivalence. Terms not understood by more than 10% of the sample were altered based on the suggestions of the patients themselves. CONCLUSION The translation and cultural adaptation of the FFI-R for the Portuguese language were completed and the Brazilian version was obtained.