title: Prevalence of hearing impairment in siblings of deaf children.
abstract: OBJECTIVE
  To assess the prevalence of hearing impairment in siblings of children with profound to total hearing impairment.
  
  
  METHODS
  Two hundred and twenty siblings of children at a deaf school in Karachi completed the screening program. This consisted of a questionnaire and pure tone audiometry.
  
  
  RESULTS
  One out of three (73 siblings) had a threshold of 25 dB or greater in their better ear. In a population, already aware of hearing loss, we note that only fifteen siblings had a previous audiogram. Although a positive family history is associated with hearing impairment in the siblings, no increase due to consanguineous marriages was noted.
  
  
  CONCLUSIONS
  This assessment has underlined the need to increase public awareness of hearing impairment. It has also exposed the lack of it in families exposed to the condition.
authors.affiliation: University Hospital, Nottingham, England.
authors.forename: J
authors.initials: J
authors.lastname: O'Hara
authors.forename: S W
authors.initials: SW
authors.lastname: Khan
authors.forename: N
authors.initials: N
authors.lastname: Inam
authors.forename: F
authors.initials: F
authors.lastname: Chugtai
authors.forename: M A
authors.initials: MA
authors.lastname: Tariq
authors.forename: M S
authors.initials: MS
authors.lastname: Quraishi
mesh_terms: D000293:Adolescent; D000328:Adult; D001301:Audiometry, Pure-Tone; D002648:Child; D002675:Child, Preschool; D003638:Deafness / Q000453:epidemiology / Q000235:genetics*; D005260:Female; D006311:Hearing Disorders / Q000175:diagnosis / Q000453:epidemiology* / Q000235:genetics; D006801:Humans; D008297:Male; D008403:Mass Screening; D010154:Pakistan / Q000453:epidemiology; D015995:Prevalence; D012307:Risk Factors; D011795:Surveys and Questionnaires