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Background/aim:  The aim of this study was to validate the Turkish Nasal Obstruction Symptom Evaluation (T-NOSE) scale. Materials and methods:  The NOSE scale was translated into Turkish. A prospective study was conducted involving adult subjects with  nasal obstruction and a control group. The patients were divided into three groups, namely nasal septum deviation (NSD), septoplasty,  and control groups. Internal consistency, test-retest reliability, validity, responsiveness, and the magnitude of the effect of surgery were  all investigated. Results:  In total, 253 subjects were enrolled in the study. Cronbach’s alpha was 0.938 and 0.942 upon test and retest, respectively, which  proved  good  internal  consistency.  The  mean  kappa  value  was  0.82,  indicating  a  high  level  of  reproducibility.  The  difference  between   postoperative and control groups was not statistically significant (P &lt; 0.05). The T-NOSE score of the NSD group was 65.67 ± 16.77,  while it was 10.75 ± 12.25 for the control group (P &lt; 0.01). The mean score improved following septoplasty (P &lt; 0.001). The magnitude  of the effect of surgery was considered high. The correlation between the visual analogue scale and NOSE scores was 0.948.  Conclusion:   The  T-NOSE  scale  is  a  valid  instrument  with  good  internal  consistency,  reliability,  reproducibility,  validity,  and   responsiveness.

Reliability and Validity of Turkish Nose Obstruction Symptom Evaluation (NOSE) Scale