title: Diagnosis of the subtype and affected ear of benign paroxysmal positional vertigo using a questionnaire.
abstract: CONCLUSIONS
  The prediction of subtype and the affected ear of benign paroxysmal positional vertigo (BPPV) derived from the answers to our questionnaire can support the definitive diagnosis of BPPV.
  
  
  OBJECTIVE
  We examined to what extent the diagnosis of subtype and the affected ear of BPPV judged from answers to a questionnaire agreed with the diagnosis decided by the results of the positional nystagmus test.
  
  
  METHODS
  We asked the following questions: 'What kind of head movements induce vertigo?' and 'How long does the vertigo continue?'. As for the affected ear, we asked which ear was lower during stronger vertigo when induced in a supine position or during sleep.
  
  
  RESULTS
  The percentages of correct diagnosis speculated by the combined answers were 69% in posterior canal-type BPPV, 48% in BPPV with geotropic nystagmus, and 39% in BPPV with apogeotropic nystagmus. The percentage of correct diagnoses of the affected ear was more than 80%.
authors: Department of Otorhinolaryngology - Head and Neck Surgery, Osaka University Graduate School of Medicine, Japan.
authors: Kayoko
authors: K
authors: Higashi-Shingai
authors: Takao
authors: T
authors: Imai
authors: Tadashi
authors: T
authors: Kitahara
authors: Atsuhiko
authors: A
authors: Uno
authors: Yumi
authors: Y
authors: Ohta
authors: Arata
authors: A
authors: Horii
authors: Suetaka
authors: S
authors: Nishiike
authors: Takayuki
authors: T
authors: Kawashima
authors: Taro
authors: T
authors: Hasegawa
authors: Hidenori
authors: H
authors: Inohara
mesh_terms: D005260:Female; D019416:Head Movements / Q000502:physiology; D006801:Humans; D008297:Male; D009759:Nystagmus, Pathologic / Q000503:physiopathology; D011187:Posture / Q000502:physiology*; D011795:Surveys and Questionnaires; D014717:Vertigo / Q000175:diagnosis* / Q000503:physiopathology