Validity and reliability of Eustachian Tube Dysfunction Questionnaire (ETDQ-7) adaptation in Bahasa Indonesia

Abstract

Background: Eustachian tube dysfunction occurred in 0.9% of world’s population. An instrument called Eustachian Tube Dysfunction Questionnaire (ETDQ-7) in English Language was developed as a scoring system to evaluate patients’ problems for the past month with 100% sensitivity and specificity value (p<0.001). This questionnaire is proven useful internationally to evaluate patients’ complaints, disease course and to determine the therapeutic outcome. However, Indonesia has not had the adapted version of ETDQ-7. Purpose: To evaluate the validity and reliability of ETDQ-7 adapted to Bahasa Indonesia. Method: This was a descriptive cross-sectional study on 31 adult subjects whose primary language were Indonesian. Subjects were required to fill the questionnaire that went through cross-cultural adaptation. The data was analyzed using Spearman coefficient correlation for validity and Cronbach-α score for reliability. Result: The results showed that each ETDQ-7 question were significantly correlated to the total score of ETDQ-7 (p<0.05) with r value ranging from 0.568-0.790 and Cronbach-α value is 0.801. Conclusion: ETDQ-7 adapted to Bahasa Indonesia was a valid and reliable questionnaire to determine disease progression in patients with Eustachian tube dysfunction whose primary language are Indonesian.

Keyword: ETDQ-7, validity, reliability, Bahasa Indonesia