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Factors causing hearing impairment: some perspectives from Europe
1Department of Audiology, Bispebjerg Hospital, Copenhagen, Denmark.
Journal of the American Academy of Audiology
|September 1, 1995
Summary
Identifying the causes of permanent childhood hearing impairment is crucial for prevention. Many cases remain unknown, highlighting the need for systematic etiologic evaluation in pediatric audiology.
Area of Science:
- Pediatric Audiology
- Ototoxicology
- Epidemiology of Hearing Impairment
Background:
- Permanent childhood hearing impairment (PCHI) etiology is incompletely understood.
- A significant proportion (20-39%) of PCHI cases have unknown causes.
- Existing European studies lack standardized criteria for longitudinal etiologic evaluation.
Purpose of the Study:
- To review factors causing permanent hearing impairment in childhood.
- To emphasize comparative studies with strict criteria for longitudinal analysis.
- To identify knowledge gaps in pediatric audiology regarding hearing impairment causes.
Main Methods:
- Review of European comparative studies on childhood hearing impairment.
- Analysis based on strict criteria and terminology.
- Examination of longitudinal changes in causative factors within defined cohorts.
Main Results:
- A high percentage of unknown causes for permanent childhood hearing impairment.
- Lack of systematic etiological evaluation in pediatric audiology.
- Mention of adult hearing impairment factors like organic toxic solvents and controversial links to endocrine disorders (hypothyroidism, diabetes mellitus).
Conclusions:
- Improved surveillance and etiological evaluation are needed to reduce unknown causes of childhood hearing impairment.
- Future research in pediatric and adult audiology can identify new damaging factors.
- Understanding etiologies can lead to prevention strategies and mitigate adverse quality of life effects.