title: A clinical study of sudden deafness.
abstract: CONCLUSIONS
  Sudden Sensorineural Hearing Loss (SSHL) was commonly seen in middle aged people. Tinnitus was reported by 87.2% of the patients, and dizziness or vertigo were reported by 48.5%. The most common concomitant disorder of SSHL was hyperlipidemia.
  
  
  OBJECTIVE
  A retrospective register study with SSHL was performed in Xi'an, China, from 2000-2009.
  
  
  RESULTS
  Of 617 inpatients, the right ear was affected in 267 cases, the left ears in 282 cases, and both ears in 68 cases. The most common age of patients was 41-50 years. There were 20.4% SSHL patients with hypertension, coronary artery disease, or diabetes, and 49.6% patients with hyperlipidemia. Auditory Brainstem Responses (ABR) were performed in 460 patients (504 ears) before treatment, and the ABR threshold of 56.4% ears was > 90 dB. The constituent ratio of patients with an ABR threshold over 90 dB was greater in the vertigo group than the other group. CT and/or MRI scans were available in 277 cases, of which 40 cases (14.4%) were abnormal.
authors.affiliation: Department of Otolaryngology, the Second Affiliated Hospital of Medical College, Xi'an Jiao Tong University , Xi'an, Shaanxi (710004) , PR China.
authors.forename: Xiaotong
authors.initials: X
authors.lastname: Zhang
authors.forename: Xinda
authors.initials: X
authors.lastname: Xu
authors.forename: Weijun
authors.initials: W
authors.lastname: Ma
authors.forename: Qing
authors.initials: Q
authors.lastname: Zhang
authors.forename: Busheng
authors.initials: B
authors.lastname: Tong
authors.forename: Hong
authors.initials: H
authors.lastname: Yu
authors.forename: Min
authors.initials: M
authors.lastname: Xu
authors.forename: Tianying
authors.initials: T
authors.lastname: Ren
authors.forename: Ulf
authors.initials: U
authors.lastname: Rosenhall
authors.forename: Matti
authors.initials: M
authors.lastname: Anniko
authors.forename: Maoli
authors.initials: M
authors.lastname: Duan
mesh_terms: D000293:Adolescent; D000328:Adult; D017677:Age Distribution; D000368:Aged; D000369:Aged, 80 and over; D002648:Child; D002681:China / Q000453:epidemiology; D016057:Evoked Potentials, Auditory, Brain Stem / Q000502:physiology; D005260:Female; D005500:Follow-Up Studies; D005544:Forecasting; D006309:Hearing / Q000502:physiology*; D006319:Hearing Loss, Sensorineural / Q000453:epidemiology* / Q000503:physiopathology; D003639:Hearing Loss, Sudden / Q000453:epidemiology* / Q000503:physiopathology; D006801:Humans; D015994:Incidence; D008297:Male; D008875:Middle Aged; D011379:Prognosis; D012189:Retrospective Studies; D055815:Young Adult
keywords: ABR; Sudden sensorineural hearing loss (SSHL); inner ear; vertigo