Foot and ankle surgery : official journal of the European Society of Foot and Ankle Surgeons
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Functional ankle instability affects 20-40% of individuals who have already suffered from a sprain. Such dysfunctions are difficult to diagnose. Therefore, the information provided by self-administered questionnaires is essential. Thus, the Ankle Instability Instrument (AII) was developed and initially validated in English. Our goal is to create a French version of the instrument, named AII-F, by scrupulously respecting the cultural adaptation phases and to make sure the new instrument has good psychometric properties. ⋯ The AII-F is reliable and valid for evaluating and measuring functional ankle instability.