Validation of the French Version of the Hearing Aid Benefit Measurement COSI and IOI-HA Questionnaires

Estimating patient satisfaction is essential in modern day-to-day medical practice. This is particularly true in the field of audiology where evaluating the benefit of patients' devices makes it possible to improve settings and increase patient satisfaction and therefore compliance. Questionnaires measuring hearing aid benefit such as the IOI-HA (International Outcome Inventory for Hearing Aids) and the COSI (Client Oriented Scale of Improvement) are used in everyday practice and promote cooperation between researchers by providing comparable data. Unlike other countries, these questionnaires have never been validated in French by psychometric studies. The objective of this study is to validate the translation of the IOI-HA questionnaire already used in the clinic and to adapt the COSI into French and statistically validate its translation.