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BACKGROUND: Questionnaires have proven their worth in detecting changes in quality of life after medical interventions.The Nasal Obstruction Symptom Evaluation scale (NOSE) is a reliable and valid tool to identify restrictions of quality of life in patients with nasal problems. The aim of this prospective study was the validation of the German version of the NOSE scale (D-NOSE). METHODS: Adaption of the NOSE in German language was performed by forward and backward translation process.Patients undergoing functional septorhinoplasty were asked to complete the D-NOSE preoperatively, one, three or twelve months after surgery. Healthy volunteers served as controls. Reliability, validity and responsiveness of the D-NOSE were determined. RESULTS: The D-NOSE showed a good internal consistency as well as good inter-item, item-total correlation and a satisfactory test-retest reliability. The convincing validity of the adapted NOSE scale was approved by good construct validity and an excellent discriminant validity. Furthermore, a high sensitivity to identify clinical changes due to an intervention indicates a good responsiveness of the D-NOSE. CONCLUSIONS: The adapted German version of the NOSE questionnaire (D-NOSE) is an appropriate and validated tool to assess the influence of nasal obstruction in quality of life in German speaking patients.

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