Objective: To determine the incidence of late onset hearing loss and associated risk factors in very low birth weight (VLBW) infants.
Study design: Retrospective study (2003-2015) of post-discharge hearing outcomes and risk factors in the VLBW infant population, before and after the institution of a standardized follow-up program.
Results: Late onset hearing loss increased from 2.9 per 100 VLBW infants to 7.8 per 100 after instituting a monitoring protocol. The follow-up compliance rate nearly doubled. Both infants with late-onset sensorineural hearing loss and those with a conductive component were identified. The rate of conductive loss detection increased seven-fold.
Conclusion: The institution of a standardized hearing follow-up program significantly increased the detection of late onset hearing loss in VLBW infants. A significant proportion of those with late onset hearing loss had a conductive component. Without identification and treatment, even conductive losses may negatively impact speech and language development.
Keywords: Late onset hearing loss; NICU; Very Low Birth Weight Infants; conductive hearing loss; delayed onset hearing loss.