Cross-cultural adaptation and reliability of the Foot Posture Index (FPI-6) - French version

• Published in: Disability and rehabilitation 2024-04, Vol.ahead-of-print (ahead-of-print), p.1-9
• Main Authors: Blouin, Cédric, Genet, François, Graff, Wilfrid, Bonnyaud, Céline, Perrier, Antoine
• Format: Article
• Language: English
• Subjects: cross-cultural adaptation; foot deformities; Foot Posture Index; reliability; validation study
• ISSN: 0963-8288; 1464-5165
• DOI: 10.1080/09638288.2023.2203524

The French version of the 6-item Foot Posture Index (FPI-6) can be used in clinical practice in French-speaking countries Intra- and inter-rater reliability of total FPI score are excellent We provide minimal detectable change value for clinical interpretation (1.58 to 1.82) The 6-item Foot Posture Index (FPI-6) is a reliable tool for the evaluation of foot deformities. Our aim was to translate and cross-culturally validate the FPI-6 for use in French-speaking countries and to determine the intra-rater and inter-rater reliability of the French version. Cross-cultural adaptation was performed according to guidelines. Two clinicians assessed the FPI-6 in 52 asymptomatic individuals. We evaluated intra- and inter-rater reliability with the intraclass correlation coefficients (ICC), correlations (p-value < 0.05) and Bland-Altman plots. Standard error of measurement (SEM) and minimum detectable change (MDC 95 ) were determined. For the cross-cultural adaptation, we modified several items of the FPI-6 user guide and added footnotes to ensure correct interpretation. ICC of the total FPI-6 scores were 0.94 to 0.96 for the intra- and inter-rater reliability for dominant and non-dominant lower limb. Correlations were significant (p