83 The Otology Questionnaire Amsterdam 4 implementation is more likely to be successful in the end. Furthermore, translation in foreign languages and cross-culturally validation is of additional value. Optimization of graphical representation might be needed in the near future. The OQUA should give us a better insight in the patient complaints and impact in the large amount of different diagnoses in otology. A more evidence-based approach with the help of this PROM and broad evaluation of the current treatments might change our future treatment and hopefully our results for the best. Longitudinal analysis, before and after otologic interventions, using the OQUA and at different time intervals in large groups should give us these insights. Conclusion A validated generic otologic questionnaire covering all relevant ear complaints, and their impact, is presented. The results of this study show good construct validity, test-retest reliability and responsiveness, The OQUA is ready for broad implementation for all patients visiting the ENT surgeon with an ear complaint. Its design furthermore makes the OQUA an effective tool to evaluate the effectiveness of surgical and non-surgical interventions by the ENT surgeon.
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