Reliability and validity of the Turkish version of the questionnaire for the assessment of self-reported olfactory functioning and olfaction-related quality of life

Abstract

Objective: To examine the reliability and validity of the Turkish version of the questionnaire for the assessment of self-reported olfactory functioning and olfaction-related quality of life (ASOF).Methods: Three different surveys [ASOF, beck depression inventory (BDI), and 36-Item Short-Form Health Survey (SF-36) questionnaire] were completed by 112 subjects with subjective olfactory dysfunction (OD) and 21 healthy controls. Sniffin' Sticks tests were performed. Internal consistency, test-retest reliability, and validity were analyzed.Results: The Cronbach a coefficients for the ASOF self-reported capability of perceiving (ASOF-SRP) specific odors scale (SOC) and ASOF self-reported olfaction-related quality of life (ASOF-ORQ) were 0.98 and 0.97, with relatively high internal consistency, respectively. The test-retest reliability for the ASOF was high for all subscales. ASOF-SRP-SOC, ASOF-SRP, and ASOF-ORQ showed significant positive correlations with the overall SF-36 score and negative correlations with BDI. The ASOF scale scores in healthy controls were significantly higher than those in patients with hyposmia and anosmia (p=0.001). TDI composite score and its subscales (threshold, discrimination, and identification) showed significant negative correlations with the BDI score and significant positive correlations with each of the SF-36 domains and overall SF-36 scores and ASOF subtests.Conclusion: This study showed that the Turkish version of the ASOF is a reliable and valid measure to determine the olfactory function and impairment in daily life associated with OD. Because of the easy-to-use features of the ASOF, it is a useful tool for initial assessment and follow-up of the subjects with OD.