title: Acute-Onset Tinnitus Is Associated with Contralateral Hearing in Sudden Deafness.
abstract: OBJECTIVE
  We aimed to evaluate the prognostic factors for acute-onset tinnitus associated with unilateral idiopathic sudden sensorineural hearing loss (ISSNHL) and to assess the relationship between these factors and the final recovery.
  
  
  METHODS
  A total of 770 patients with unilateral ISSNHL were enrolled retrospectively and their medical records reviewed. Patients were classified into two groups according to the presence of acute-onset tinnitus at the initial examination. Patient characteristics and the results of pure-tone audiometry were compared between the two groups initially and 3 months later.
  
  
  RESULTS
  A total of 70.9% (n = 546) of patients had tinnitus initially. There was no significant difference in the mean hearing thresholds of the affected ear irrespective of accompanying tinnitus. In contrast, patients with tinnitus in the affected ear tended to have significantly better mean hearing thresholds in the nonaffected ear (p < 0.05). The logistic regression analysis revealed that better mean hearing thresholds in the nonaffected ear were associated with tinnitus occurrence (p < 0.05). Better hearing thresholds in the nonaffected ear, younger age, absence of dizziness, low-tone hearing loss, and combined intratympanic dexamethasone injection were associated with full recovery (p < 0.05). However, tinnitus was not an independent risk factor for full recovery.
  
  
  CONCLUSIONS
  Better contralateral hearing was associated with both an increased incidence of concurrent tinnitus and a better final recovery. However, tinnitus was not related to full recovery.
authors.affiliation: Department of Otorhinolaryngology - Head and Neck Surgery, School of Medicine, Eulji University, Daejeon, Korea.
authors.forename: Ho Yun
authors.initials: HY
authors.lastname: Lee
authors.forename: Myoung Su
authors.initials: MS
authors.lastname: Choi
authors.forename: Dong Sik
authors.initials: DS
authors.lastname: Chang
authors.forename: Ah-Young
authors.initials: AY
authors.lastname: Kim
authors.forename: Chin Saeng
authors.initials: CS
authors.lastname: Cho
mesh_terms: D000208:Acute Disease; D000293:Adolescent; D000328:Adult; D000368:Aged; D000369:Aged, 80 and over; D001301:Audiometry, Pure-Tone; D001309:Auditory Threshold; D002648:Child; D002675:Child, Preschool; D015331:Cohort Studies; D003907:Dexamethasone / Q000627:therapeutic use; D005260:Female; D005938:Glucocorticoids / Q000627:therapeutic use; D003639:Hearing Loss, Sudden / Q000150:complications* / Q000188:drug therapy / Q000503:physiopathology; D006801:Humans; D000069555:Injection, Intratympanic; D016015:Logistic Models; D008297:Male; D008875:Middle Aged; D011379:Prognosis; D020127:Recovery of Function; D012189:Retrospective Studies; D014012:Tinnitus / Q000150:complications* / Q000503:physiopathology; D055815:Young Adult
chemical_list: D005938:Glucocorticoids; D003907:Dexamethasone