Comparison of auditory brainstem response and behavioral screening in neonates

Area of Science:

• Neonatal care
• Audiology
• Pediatric health

Background:

• Early detection of hearing loss in neonates is crucial for timely intervention.
• Behavioral screening methods have been used, but their accuracy is debated.
• Brainstem Evoked Response Audiometry (BERA) is a reliable objective measure of hearing.

Purpose of the Study:

• To compare the effectiveness of behavioral hearing screening methods with BERA in neonates.
• To evaluate the accuracy of behavioral tests and Crib-o-gram in identifying hearing loss.
• To determine the false positive rates of different neonatal hearing screening protocols.

Main Methods:

• Two studies were conducted: one in Halifax and one in Ottawa.
• The Halifax study compared BERA and behavioral screening in neonatal intensive care unit (NICU) and at-risk infants.
• The Ottawa study used BERA as a standard to evaluate the Crib-o-gram screening test for NICU infants.

Main Results:

• The behavioral test in Halifax showed high false positive rates: 86.1% for NICU infants and 50.5% for at-risk infants.
• In Ottawa, approximately one-third of infants with normal BERA thresholds failed the Crib-o-gram screening.
• The Crib-o-gram was capable of identifying moderate to severe hearing losses.

Conclusions:

• Behavioral hearing screening methods exhibit significant limitations due to high false positive rates in neonates.
• BERA serves as a more accurate audiological assessment for neonatal hearing screening.
• Objective measures like BERA are essential for reliable identification of hearing impairment in newborns.