Translation and validation of the short version of the Questionnaire of Olfactory Disorders–Negative Statements to Spanish

Introduction: There are more than 400 million of native Spanish speakers around the world, being the second most spoken language in regard to the number of native speakers. For this reason, a valid questionnaire to access the olfaction of our patients is necessary. Material and methods: Validation and cross-cultural adaptation of the svQOD-NS questionnaire to the Spanish language. Internal consistency of svQOD-NS measured with Cronbach α. Results: 40 patients met the inclusion criteria. 41 ± 153 (range 21–82), and 32 (80%) were female. 20 patients (57,1%) were male and 15 (42,9%) were female. There was a normal distribution among patients included according to the Shapiro-Wilk test (p = 0.175). Internal consistency of svQOD-NS measured with Cronbach α was 0.861. The intraclass correlation coefficient was 0.849 (confidence interval [CI] 95%: 0.766–0.911). Conclusion: The Spanish Language is the second most spoken language with regard to the number of native speakers and the svQOD-NS translation represents a valid option for the Spanish-speaking medical community, from which a large number of patients can benefit.