Mass newborn screening for hearing impairment.

Area of Science:

• Neonatal care
• Audiology
• Public health

Background:

• Significant hearing impairment in newborns can impede communication development.
• Early detection is crucial for timely intervention and management.
• Universal newborn hearing screening programs aim to identify infants at risk.

Purpose of the Study:

• To evaluate the effectiveness of a newborn hearing screening program utilizing Transient Evoked Oto Acoustic Emissions (TEOAE).
• To determine the incidence of significant hearing impairment in a hospital-based cohort.
• To assess the performance metrics (sensitivity, specificity, predictive value) of the TEOAE screening protocol.

Main Methods:

• Screening of 4,387 newborns within 24 hours of birth using TEOAE.
• Repeated screening at 2 and 6 weeks for infants who initially tested positive.
• Referral to Otolaryngology for formal audiological evaluation for persistent positive screens.
• Calculation of screening rate, incidence of hearing impairment, and diagnostic accuracy metrics.

Main Results:

• A screening rate of 97.2% was achieved.
• 8 out of 312 infants with initial positive screens were diagnosed with significant hearing impairment.
• The incidence of severe hearing impairment requiring binaural amplification was 1 in 1,096.
• Sensitivity was 100%, specificity 93%, and positive predictive value 26%.

Conclusions:

• The TEOAE screening strategy is reliable and sensitive for detecting significant hearing impairment in newborns.
• The screening protocol enabled early diagnosis and intervention, typically by 7 months of age.
• A need exists to develop strategies for reducing the high false positive rate in TEOAE screening.