Correlation between olfactory severity ratings based on olfactory function test scores and self-reported severity rating of olfactory loss.

Correlation between olfactory severity ratings based on olfactory function test scores and self-reported severity rating of olfactory loss.

Acta Otolaryngol. 2017 Jan 23;:1-5

Authors: Seok J, Shim YJ, Rhee CS, Kim JW

Abstract
CONCLUSION: Olfactory test scores are significantly correlated with self-rated severity scales. However, the statistical rating based on olfactory tests did not strongly agree with the self-reported severity rating. This suggests that there is a discrepancy between olfactory test results and the severity described by patients themselves.
OBJECTIVES: This study aimed to identify the correlation between statistical ratings based on test scores and self-rating of the severity of olfactory loss.
METHOD: A total of 1555 subjects were asked to rate olfactory loss severity by one of five scales. Olfactory tests consist of the butanol threshold test (BTT) and cross-cultural smell identification test (CCSIT).
RESULTS: There were significant correlations between BTT scores and self-rated severity scales (r = 0.619, p < 0.001) and between CCSIT scores and self-rated severity scales (r = 0.597, p < 0.001) after adjustment for age, sex, and medical conditions. Using discriminant analysis for both BTT and CCSIT, scores 0-4 could be statistically rated as anosmia, scores 5 and 6 as severe hyposmia, scores 7 and 8 as moderate hyposmia, and scores 9-12 as normosmia (Wilks's lambda = 0.605, p < 0.001 for BTT and Wilks's lambda = 0.597, p < 0.001 for CCSIT).

PMID: 28112015 [PubMed - as supplied by publisher]

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