https://www.selleckchem.com/pr....oducts/sch-442416.ht
OBJECTIVE To examine the construct validity, reliability and responsiveness of the Otology Questionnaire Amsterdam (OQUA). DESIGN Multicentre, longitudinal study in 2 separate cohorts of patients visiting an ENT surgeon via an online survey programme. SETTING Tertiary ENT clinics. PARTICIPANTS Cohort 1 consisted of patients at their first visit at an ENT outpatient clinic with an ear complaint. Cohort 2 consisted of patients who underwent surgery, with a 3-month follow-up post-surgery. MAIN OUTCOME MEASURES Construct validity Hypothe