Development, validity and reliability of Persian international outcome inventory for hearing aids questionnaire

Background and Aim: Self-assessment questi-onnaire was developed to judge the success or failure of all aspects of the hearing aid selection and fitting process. The International outcome Inventory for Hearing Aids (IOI-HA( is one of the most common questionnaires to quantify the satisfaction of hearing aid users and its impact on their lives. This study mainly focused on preparing a Persian version of this questionnaire and analyzing its validity and reliability. Methods: First, the original English version of the questionnaire was translated into Persian, then its content and face validity was deter-mined by expert in field and examiners. Persian IOI-HA was presented to 50 hearing aid users twice with two to three weeks interval and, the collected data were analyzed statistically. Fina-lly, in order to evaluate the reliability of the cur-rent questionnaire, the correlations of items and paired t-test statistics for total score in test-retest was obtained. Results: The results of face validity assessment revealed that the current questionnaire has a high quality in translation, intelligibility, and cultural adaptation. Mean total score was 26.80 (SD=3.65), and the overall Cronbach’s alpha of this questionnaire was 0.73. Reliability asse-ssment showed that the means of the total scores of the current questionnaire in test-retest have no significant difference, and the scores of the items in test-retest showed a strong correlation. Conclusion: Based on the obtained results, the Persian version of the questionnaire has a satis-factory face validity and reliability and could be used in medical centers.