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Diagnostic delay in deafness - the effect of active case finding
Insights
A mobile hearing clinic in rural Ontario identified hearing impairments in 25% of children. Early detection of hearing loss was improved, especially for severe sensorineural hearing loss in preschoolers.
Area of Science:
- Pediatrics
- Audiology
- Public Health
Background:
- Hearing impairment affects a significant portion of children in rural communities.
- Rural areas often lack adequate surveillance for childhood hearing problems.
- Early identification and management of hearing loss are crucial for child development.
Purpose of the Study:
- To assess the prevalence of hearing impairments in children in rural northern Ontario.
- To evaluate the effectiveness of a mobile hearing clinic in early detection and management.
- To improve the process for recommending and fitting hearing aids.
Main Methods:
- A mobile hearing clinic conducted hearing tests on 1,876 children during community visits.
- Data collected included types of hearing loss (sensorineural and conductive) and age of identification.
- Follow-up assessments were conducted to monitor management effectiveness.
Main Results:
- 25% (464) of children tested had hearing impairments.
- Seven preschool children with severe to profound deafness were identified.
- Early detection of severe sensorineural hearing loss improved from 30 to 18 months; conductive hearing loss identification age decreased.
- Management of conductive hearing loss showed improvement post-clinic visits.
Conclusions:
- Mobile hearing clinics are effective in identifying hearing impairments in underserved rural populations.
- Early detection and intervention significantly improve outcomes for children with hearing loss.
- Enhanced programs for hearing aid fitting and counseling are needed in rural communities.
Abstract:
Impaired hearing, sensorineural or conductive, was detected in 464 (25 per cent) of the 1,876 children tested during visits with a mobile hearing clinic in rural northern Ontario. Seven severe to profoundly deaf preschool children were identified; expected prevalence in this population is 5--10 preschoolers. Three older children (7--15 years of age), also, were found to have severe to profound deafness that previously had been undetected. Previously, initial identification of severe sensorineural hearing loss in this age group in these areas was at an average age of 30 months. Since visits by the clinic this is 18 months. Conductive hearing losses that had inhibited learning were identified earlier than the reported average (6.4 years vs 5.3--9.0 years of age). Follow-up has shown more effective management of conductive hearing loss since visits by the clinic. Few rural Ontario communities with populations under 10,000 have adequate surveillance for hearing problems. The goal of The Hospital for Sick Children's Mobile Hearing Clinic is to identify early all children with hearing problems and to speed the introduction of a better program for the recommendation and fitting of hearing aids, including proper counselling in the use of amplification.