Olfactory dysfunction questionnaire: Russian-language adaptation of Olfactory Questionnaire (OQ, Chon-Woon Kim, etc)

Olfactory dysfunction is a common problem. It became particularly relevant during the pandemic of a new coronavirus infection. Olfactory tests are used for determination of olfactory dysfunction, but patients can only perform them with the participation of a doctor or trained medical personnel. Due to this, the possibility of questionnaires use for self-examination of patients’ sense of smell becomes important. Objective. To adapt the Korean version of «Olfactory Dysfunction Questionnaire» (Olfactory Questionnaire, OQ). Patients and methods. The study included 162 patients aged from 16 to 37. The exploratory factor analysis of the Russian version of the test was carried out with the use of confirmatory factor analysis. The evidence of convergent validity was done based on the correlation analysis of adaptive scale of the olfactory test with butanol by the determination of the olfactory thresholds (Sniffin’ Sticks test, SST). The test reliability was estimated by calculating the Cronbach and Macdonald coefficients. Results and conclusion. The conducted analysis showed that the Russian-language version of the olfactory dysfunction questionnaire (scale) has a sufficiently high structural and convergent validity, as well as a high internal consistency. The test can be used for diagnostic and research purposes both as an individual tool and as a part of other methods of olfactory function studying. Based on the study results, the following conditions of olfactory function were identified: 39—44 points — normosmia; 31—38 points — light hyposmia; 18—30 points — moderate hyposmia; 11—17 severe hyposmia; 0—10 points — anosmia. The obtained data can be used to diagnose and assess the manifestation of olfactory dysfunction when applying the Russian-language version of questionnaire.