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Audiometric accuracy of the click ABR in infants at risk for hearing loss
1Otologic Function Unit, Mount Sinai Hospital, University of Toronto, Ontario, Canada.
Insights
Auditory brainstem response (ABR) testing accurately detects childhood hearing loss in at-risk infants. Test accuracy depends on chosen criteria, but ABR is excellent for identifying significant sensorineural hearing loss.
Area of Science:
- Audiology
- Pediatric Medicine
- Neuroscience
Background:
- Auditory brainstem response (ABR) to clicks is a common method for early hearing loss detection in at-risk children.
- There is a need for large-sample data on the test accuracy of ABR for childhood hearing dysfunction.
- Previous studies lack direct, large-scale estimates of ABR test accuracy in pediatric populations.
Purpose of the Study:
- To provide direct, large-sample estimates of test accuracy for click ABR in children at risk for hearing loss.
- To compare click ABR thresholds in infancy with behavioral puretone audiometry in later childhood.
- To analyze ABR accuracy based on varying criteria for hearing loss and ABR abnormality.
Main Methods:
- A cohort of 713 children (1,367 ears) at risk for hearing loss was studied.
- Click ABR thresholds were obtained at 3 to 12 months corrected age.
- Follow-up behavioral puretone audiometry was conducted at 3 to 8 years of age.
- Data were analyzed using 2x2 decision matrices and relative operating characteristics (ROCs).
Main Results:
- The accuracy of ABR testing was found to be highly dependent on the specific criteria used to define hearing loss and ABR outcomes.
- ABR demonstrated excellent accuracy in detecting average sensorineural hearing loss exceeding 30 dB at 2 and 4 kHz.
- Relative operating characteristics (ROCs) effectively summarized ABR accuracy across various criteria.
Conclusions:
- Click ABR is a valuable tool for early detection of hearing loss in at-risk children.
- Establishing clear criteria for both hearing loss and ABR abnormality is crucial for optimizing test accuracy.
- ABR shows high efficacy in identifying significant sensorineural hearing impairment in pediatric populations.
Abstract:
The auditory brainstem response (ABR) to clicks is widely used for early detection of hearing loss in the child at risk for hearing dysfunction, but there is a lack of direct, large-sample estimates of test accuracy. In this report, results and preliminary analyses are presented that relate click ABR thresholds obtained at 3 to 12 months corrected age to detailed follow-up behavioral puretone audiometry at 3 to 8 years of age, for 1,367 ears in 713 children at risk for hearing loss. The data are analyzed in terms of conventional 2 x 2 decision matrices and associated parameters, using dichotomous (binary) measures of hearing loss and ABR test outcome. The accuracy of the ABR appears to depend strongly on the precise criteria that are chosen to define both hearing loss and ABR outcome. ABR accuracy is excellent for detecting average sensorineural hearing loss at 2 and 4 kHz in excess of 30 dB, and the overall results for a wide range of hearing loss and ABR abnormality criteria can be conveniently summarized in terms of relative operating characteristics (ROCs).