Cross-cultural adaptation and validation of an ankle instability questionnaire for use in Chinese-speaking population

摘要

Background: The Identification of Functional Ankle Instability (IdFAI) is a valid and reliable tool to identify chronic ankle instability; however,it was developed in English, thus limiting its usage only to those who can read and write in English. The objectives of our study were to (1)cross-culturally adapt a Chinese (Mandarin) version of the IdFAI and (2) determine the psychometric properties of the Chinese version IdFAI.Methods: The cross-cultural adaptation procedures used by the investigators and translators followed previously published guidelines andincluded 6 stages: (1) initial translation, (2) synthesis of the translations, (3) back translation, (4) developing the pre-final version for field testing,(5) testing the pre-final version, and (6) finalizing the Chinese version of IdFAI (IdFAI-C). Five psychometric properties of the IdFAI-C wereassessed from results of 2 participant groups: bilingual (n = 20) and Chinese (n = 625).Results: A high degree of agreement was found between the English version of IdFAI and IdFAI-C (intra-class correlation 2,1 = 0.995). An excel-lent internal consistency (Cronbach’s a = 0.89), test?retest reliability (intra-class correlation 2,1 = 0.970), and construct validity (r(625) = 0.67)was also found for the IdFAI-C. In addition, the results of exploratory and confirmatory factor analysis indicated that ankle instability was theonly construct measured from the IdFAI.Conclusion: The IdFAI-C is a highly reliable and valid self-report questionnaire that can be used to assess ankle instability. Therefore, we sug-gest that it can be used to effectively and accurately assess chronic ankle instability in clinical settings for Chinese-speaking individuals.