The incidence of sensorineural hearing loss (SNHL) is still high in very low birth weight (VLBW) infants. The purpose of our study was to provide the prevalence rates of SNHL and to analyze the risk factors of hearing impairment and changes in hearing thresholds in a cohort of VLBW infants. A retrospective observational study was conducted in our neonatal intensive care unit (NICU) from 2012 to 2016. All VLBW infants included were screened by transient evoked otoacoustic emissions (TEOAEs) and diagnostic auditory brainstem response (ABR). In total, we enrolled 316 infants and SNHL was diagnosed in 68, leading to an early incidence of 21.5% as 36 infants out of 68 improved. Finally, SNHL was confirmed in 20 patients (6.3%) who needed hearing aids. They were significantly smaller, sicker, had longer hospitalizations, and received more ototoxic therapies. Logistic regression analysis showed that gestational age (GA) influenced the association between drugs and SNHL. The results underlined how the total exposure to antibiotics is significantly associated with SNHL, even after GA correction. In conclusion, GA, birth weight and, above all, the length and complexity of NICU stay quantify the risk of SNHL and should be considered at the individual level for parent counseling.

Objectives: The purpose of this study was to compare the incidence of hearing loss at three months of age in a cohort of newborns with hypoxic-ischaemic encephalopathy (HIE) treated with therapeutic hypothermia (TH) with that reported in the literature. We also evaluated potential risk factors associated with audiological impairment and changes in hearing threshold during follow-up. Methods: This retrospective observational cohort study was conducted at the Neonatal Intensive Care Unit of the Fondazione Policlinico Universitario A. Gemelli, IRCCS in Rome, Italy, between January 2017 and December 2023. Infants underwent audiological screening and a full diagnostic evaluation at three months of age and were followed during the first year of life. Results: A total of 149 infants were enrolled, and hearing loss was identified in six (4.0%) at three months of age. Two of these six infants showed an improvement in their hearing threshold, resulting in a prevalence of permanent bilateral sensorineural hearing loss (SNHL) of four out of 149 infants (2.7%), with no cases of late-onset hearing loss detected. Gestational age was identified as an independent protective factor against SNHL (OR 0.49; 95% CI 0.22–0.91). Conclusions: The audiological screening program demonstrates effectiveness in early intervention for diagnosing and treating hearing loss. Infants with HIE are at high risk for hearing disorders and require increased attention in neonatological and audiological management. Management should be individualized based on specific risk factors. The association between gestational age and susceptibility to cochlear damage should be confirmed by further studies.