title: International Classification of Headache Disorders 3rd edition beta-based field testing of vestibular migraine in China: Demographic, clinical characteristics, audiometric findings and diagnosis statues.
abstract: OBJECTIVE
  This study explored the clinical characteristics of vestibular migraine in Chinese subjects and performed a field test of the criteria of the International Classification of Headache Disorders 3rd edition beta version.
  
  
  METHODS
  Consecutive patients with vestibular migraine were surveyed and registered in a headache clinic during the study period. The diagnosis of vestibular migraine was made according to International Classification of Headache Disorders 3rd edition beta version. Assessments included standardized neuro-otology bedside examination, pure-tone audiogram, bithermal caloric testing, neurological imaging, cervical X-ray or magnetic resonance imaging, Doppler ultrasound of cerebral arteries and laboratory tests.
  
  
  RESULTS
  A total of 67 patients (62 female/five male, 47.8 ± 10.3 years old) were enrolled in this study. The mean ages of migraine and vertigo onset were 32.2 ± 11.5 and 37.9 ± 10.1 years, respectively. The most common migraine subtype was migraine without aura (79%), followed by migraine with aura (12%) and chronic migraine (9%). The duration of vertigo attacks varied from seconds to days and 25% of patients had attacks that lasted less than 5 minutes. Among the patients with short-lasting attacks, 75% of these patients had ≥5 attacks per day within 72 hours. Auditory symptoms were reported in 36% of the patients. Migraine prophylactic treatments were effective in 77% of the patients.
  
  
  CONCLUSIONS
  Our study showed that the clinical features of vestibular migraine in China were similar to those of Western studies. The definition of vertigo episodes and migraine subtypes of vestibular migraine in International Classification of Headache Disorders 3rd edition beta version might be modified further. More than five vertigo attacks per day within 72 hours might be helpful as far as identifying vestibular migraine patients with short-lasting attacks.
authors.affiliation: Department of Neurology, The First Affiliated Hospital of Chongqing Medical University, China.
authors.forename: Yixin
authors.initials: Y
authors.lastname: Zhang
authors.affiliation: Department of Neurology, The First Affiliated Hospital of Chongqing Medical University, China.
authors.forename: Qingtao
authors.initials: Q
authors.lastname: Kong
authors.affiliation: Department of Neurology, The First Affiliated Hospital of Chongqing Medical University, China.
authors.forename: Jinjin
authors.initials: J
authors.lastname: Chen
authors.affiliation: Department of Neurology, The First Affiliated Hospital of Chongqing Medical University, China.
authors.forename: Lunxi
authors.initials: L
authors.lastname: Li
authors.affiliation: Department of Neurology, The First Affiliated Hospital of Chongqing Medical University, China.
authors.forename: Dayan
authors.initials: D
authors.lastname: Wang
authors.affiliation: Department of Neurology, The First Affiliated Hospital of Chongqing Medical University, China zjyheadache@hospital-cqmu.com.
authors.forename: Jiying
authors.initials: J
authors.lastname: Zhou
mesh_terms: D002681:China; D005260:Female; D006801:Humans; D038801:International Classification of Diseases; D008297:Male; D008875:Middle Aged; D008881:Migraine Disorders / Q000145:classification* / Q000175:diagnosis*; D009460:Neurologic Examination; D014717:Vertigo / Q000145:classification* / Q000175:diagnosis*
keywords: International Classification of Headache Disorders 3rd edition beta version; Vestibular migraine; clinical characteristics; field testing