Cross-cultural adaptation, reliability, and validation of the Korean version of the identification functional ankle instability (IdFAI)

AbstractPurpose: To cross-culturally adapt the Identification Functional Ankle Instability for use with Korean-speaking participants.Methods: The English version of the IdFAI was cross-culturally adapted into Korean based on the guidelines. The psychometric properties in the Korean version of the IdFAI were measured for test-retest reliability, internal consistency, criterion-related validity, discriminative validity, and measurement error 181 native Korean-speakers.Results: Intra-class correlation coefficients (ICC2,1) between the English and Korean versions of the IdFAI for test–retest reliability was 0.98 (standard error of measurement = 1.41). The Cronbach’s alpha coefficient was 0.89 for the Korean versions of IdFAI. The Korean versions of the IdFAI had a strong correlation with the SF-36 (rs = −0.69, p  10 was the optimal cutoff score to distinguish between the group memberships. The m...