title: Correlation between olfactory severity ratings based on olfactory function test scores and self-reported severity rating of olfactory loss.
abstract: CONCLUSIONS
  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.
  
  
  OBJECTIVE
  This study aimed to identify the correlation between statistical ratings based on test scores and self-rating of the severity of olfactory loss.
  
  
  METHODS
  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).
authors.affiliation: a Department of Otorhinolaryngology , Armed Forces Seoul Hospital , Seoul , South Korea.
authors.forename: Jungirl
authors.initials: J
authors.lastname: Seok
authors.affiliation: b Department of Otorhinolaryngology , Seoul National University College of Medicine, Seoul National University Bundang Hospital , Seongnam , South Korea.
authors.forename: Ye Ji
authors.initials: YJ
authors.lastname: Shim
authors.affiliation: b Department of Otorhinolaryngology , Seoul National University College of Medicine, Seoul National University Bundang Hospital , Seongnam , South Korea.
authors.forename: Chae-Seo
authors.initials: CS
authors.lastname: Rhee
authors.affiliation: b Department of Otorhinolaryngology , Seoul National University College of Medicine, Seoul National University Bundang Hospital , Seongnam , South Korea.
authors.forename: Jeong-Whun
authors.initials: JW
authors.lastname: Kim
mesh_terms: D000293:Adolescent; D000328:Adult; D000368:Aged; D000369:Aged, 80 and over; D005260:Female; D006801:Humans; D008297:Male; D008875:Middle Aged; D000857:Olfaction Disorders / Q000175:diagnosis*; D012720:Severity of Illness Index; D055815:Young Adult
keywords: Anosmia; BTT; CCSIT; butanol threshold test; correlation; cross-cultural smell identification test; hyposmia; loss of smell; olfactory function