Preserving the integrity of the auditory system is crucial for language development, learning, and social interaction. Any interruption in these processes during development can result in significant functional impairments. The objective was to carry out a longitudinal analysis of audiological data from children who underwent an initial assessment at SASA in 2018 and were followed up for 4 years at the outpatient's annual consultations. This is a retrospective cross-sectional study with children who underwent initial assessment for hearing loss and follow-up at a reference service for the Unified Health System (SUS), from January 2018 to December 2022. Children aged 0 to 12 years old who underwent an initial assessment for hearing loss and follow-up in the service's database, where secondary data analyses will be carried out. Data from 127 subjects with an average age of 20 months were analyzed. 60.62% of the subjects were diagnosed with some degree of hearing loss, and the etiology of the change remained unknown in 29.90% of the cases. A considerable percentage of subjects remained under follow-up during annual consultations. There was good adherence to annual returns and follow-ups at the outpatient clinic, indicating a high attendance rate.
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