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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 : Hypothesis testing, internal consistency and inter‐item correlation.  Reliability : Test‐retest reliability. The construct approach was used for assessing responsiveness. Hypotheses were formulated based on the association between the OQUA and Glasgow Health Status Inventory (GHSI) or Global Rating Scale (GRS).    Results   Construct validity : The correlation between the individual items in the impact domain ranged from 0.424 to 0.737. Confirmatory factor analysis showed a good fit. As expected, the OQUA impact showed strong relationships with GHSI total and general scale.   Reliability : The test‐retest reliability coefficient ranged from 0.541 to 0.838.   Responsiveness : All hypotheses were conformed. As expected, the change score of the OQUA showed good correlation between OQUA impact and GHSI and moderate correlation between the GRS and OQUA complaints.    Conclusion  The OQUA has 8 complaint domains (earache, pressure sensation, itching, tinnitus, hearing loss, ear discharge, loss of taste and dizziness) and 1 impact domain. Each domain results in one score of 0‐100. The OQUA shows good results for construct validity, (test‐retest) reliability and responsiveness, supporting the potential benefit for the patient with an ear complaint visiting the ENT surgeon. The extensive validation furthermore confirms a certified generic otology PROM with an impact and a complaints' part, to be used in different types of otologic interventions and patient groups.

clinical otolaryngology

The Otology Questionnaire Amsterdam: A generic patient‐reported outcome measure about the severity and impact of ear complaints. Validation, reliability and responsiveness