title: Prevalence of cochlear dead regions in moderate to severe sensorineural hearing impaired children.
abstract: OBJECTIVE
  To investigate the overall prevalence of cochlear dead regions in children with moderate to severe sensorineural hearing impairment.
  
  
  METHODS
  Threshold-equalizing noise (or TEN) test was administered on thirty sensorineural hearing impaired children (8 girls, 22 boys), aged 5-14 years (mean±SD8.5±2.8).
  
  
  RESULTS
  Classifying by subject, 76% tested positive for cochlear dead regions in one or both ears at least at one frequency. Classifying by ears, 58.3% had dead regions at one frequency or more. Classifying by the number of frequencies were tested, 20% met the criteria for a dead region. The difference between mean absolute thresholds in two groups was statistically significant at 1000Hz and below (p<0.05).
  
  
  CONCLUSIONS
  The results indicated a relatively high prevalence of dead regions in children with sensory neural hearing impairment, especially for frequencies at which the hearing loss exceeds 70dB HL.
authors.affiliation: Department of Audiology, School of Rehabilitation Sciences, Iran University of Medical Sciences, Mirdamad Blvd., Madar Sq., Shahnazari St., Tehran, Iran. Electronic address: ahadi.m@iums.ac.ir.
authors.forename: Mohsen
authors.initials: M
authors.lastname: Ahadi
authors.affiliation: Department of Audiology, School of Rehabilitation Sciences, Iran University of Medical Sciences,Mirdamad Blvd., Madar Sq., Shahnazari St. Tehran, Iran. Electronic address: milani.m@iums.ac.ir.
authors.forename: Mina
authors.initials: M
authors.lastname: Milani
authors.affiliation: Department of Audiology, University of Social Welfare and Rehabilitation, Velenjak, daneshjou Blvd., Tehran, Iran. Electronic address: malayeris@gmail.com.
authors.forename: Saeed
authors.initials: S
authors.lastname: Malayeri
mesh_terms: D000293:Adolescent; D002648:Child; D002675:Child, Preschool; D003051:Cochlea / Q000473:pathology*; D005260:Female; D006319:Hearing Loss, Sensorineural / Q000473:pathology*; D006320:Hearing Tests; D006801:Humans; D008297:Male; D012720:Severity of Illness Index
keywords: Children; Dead regions; Hearing loss; Prevalence; TEN(HL) test