title: Assessment of hyperacusis with a newly produced Japanese version of the Khalfa hyperacusis questionnaire.
abstract: OBJECTIVE
  The purpose of this study was to determine the validity and reliability of a Japanese version of the Khalfa hyperacusis questionnaire (KHQ) and proposed a threshold KHQ score for classifying hyperacusis.
  
  
  METHODS
  In total, 112 patients with hyperacusis (group A) and 103 patients without hyperacusis (group B). The patients in group A were further classified into the following subgroups: subjects with hyperacusis as their chief complaint (n = 26, group A1) and subjects with hyperacusis accompanied by chief complaints of tinnitus and/or hearing loss (n = 86, group A2).
  
  
  RESULTS
  The average total questionnaire score for patients in group A was 11.8 ± 9.7, which was statistically significantly higher than that of patients in group B, 5.7 ± 4.8. Cronbach's coefficients for internal consistency were high for the total score (0.92). The average total scores for groups A1 and A2 were 18.1 ± 11.1 and 9.9 ± 8.4, respectively, and the difference between the groups was statistically significant.
  
  
  CONCLUSIONS
  We developed a Japanese version of the KHQ. It showed high reliability and validity; suggesting its usefulness in clinical practice. We propose that a total KHQ score of 16 is an appropriate cutoff for classifying hyperacusis.
authors.affiliation: a Department of Otolaryngology, Head and Neck Surgery , Keio University School of Medicine , Tokyo , Japan.
authors.forename: Naoki
authors.initials: N
authors.lastname: Oishi
authors.affiliation: a Department of Otolaryngology, Head and Neck Surgery , Keio University School of Medicine , Tokyo , Japan.
authors.forename: Hiroyuki
authors.initials: H
authors.lastname: Yamada
authors.affiliation: a Department of Otolaryngology, Head and Neck Surgery , Keio University School of Medicine , Tokyo , Japan.
authors.forename: Sho
authors.initials: S
authors.lastname: Kanzaki
authors.affiliation: b Department of Otolaryngology , Saitama Red Cross Hospital , Saitama , Japan.
authors.forename: Akihiro
authors.initials: A
authors.lastname: Kurita
authors.affiliation: c Department of Otolaryngology , Eiju Sogo Hospital , Tokyo , Japan.
authors.forename: Yoichiro
authors.initials: Y
authors.lastname: Takiguchi
authors.affiliation: d Department of Otolaryngology , Yuge E.N.T. Clinic , Kanagawa , Japan.
authors.forename: Isamu
authors.initials: I
authors.lastname: Yuge
authors.affiliation: e Department of Otolaryngology , Asama Jibiinkoka Clinic , Ibaragi , Japan.
authors.forename: Yoji
authors.initials: Y
authors.lastname: Asama
authors.affiliation: f Department of Otolaryngology, Head and Neck Surgery , Kyorin University School of Medicine , Tokya , Japan.
authors.forename: Masatsugu
authors.initials: M
authors.lastname: Masuda
authors.affiliation: a Department of Otolaryngology, Head and Neck Surgery , Keio University School of Medicine , Tokyo , Japan.
authors.forename: Kaoru
authors.initials: K
authors.lastname: Ogawa
mesh_terms: D000328:Adult; D000368:Aged; D005260:Female; D006801:Humans; D012001:Hyperacusis / Q000175:diagnosis*; D007564:Japan; D008297:Male; D008875:Middle Aged; D015203:Reproducibility of Results; D011795:Surveys and Questionnaires
keywords: Hyperacusis; questionnaire