The study presents the results of cross-cultural adaptation and validation of the sino-nasal outcome test (SNOT-22) for russian-speaking patients with vasomotor rhinitis and postnasal drip. The purpose of this study was to determine the test-retest reliability, internal consistency and the clinical validity of the Russian version of the SNOT-22 questionnaire. Two independent translators translated the original English version of the SNOT-22 questionnaire into Russian. The final Russian-language version (SNOT-22 (RUS)) was summarized by the third researcher (ENT specialist) based on two translations, and then translated back into English. The study included 94 participants: the experimental group - 47 patients with vasomotor rhinitis and postnasal drip and the control group - 47 healthy volunteers. All participants were asked to fill in a 22-item questionnaire. Statistical analysis revealed a good internal consistency of SNOT-22 (RUS) for the experimental group (Cronbach’s alpha, html5-dom-document-internal-entity2-945-end = 0.88) and control group (html5-dom-document-internal-entity2-945-end = 0.91). The intraclass correlation coefficient (ICC) indicates high retest reliability for patients (ICC = 0.97) and controls (ICC = 0.86) for SNOT-22 (RUS). The mean total scores of the overall SNOT-22 (RUS) questionnaire were significantly higher in the experimental group than in the control group. This confirms that the SNOT-22 (RUS) questionnaire is a reliable tool for assessment of psychosocial consequences, symptoms of nasal obstruction, duration and severity of clinical manifestations in sinusitis and rhinitis.
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