Abstract
Objective: To analyze the temporal and spatial distribution of hospitalizations due to Neonatal Abstinence Syndrome in Brazil, between 2020 and 2025, based on records from the SUS Hospital Information System. Methods: Ecological, descriptive, quantitative, and retrospective study, based on secondary data from the SUS Hospital Information System (SIH/SUS), obtained via DATASUS/TabWin. Hospitalizations of newborns with ICD-10 P96.1 were included. Absolute frequency, distribution by federative unit, and descriptive measures (minimum, median, mean, and maximum) were analyzed. Results: Variation was observed throughout the period, with a reduction in 2021, an increase until 2023, a decrease in 2024, and renewed growth in 2025, which presented the highest average (88.73) and median (14.5). The peak occurred in 2023, with 1475 hospitalizations in the State of São Paulo. There was a strong concentration in the Southeast, especially in São Paulo (4935 hospitalizations), followed by Minas Gerais (1256) and Rio Grande do Sul (797). States in the North and part of the Northeast showed low or no hospitalizations. Conclusion: NAS presents an unequal distribution and variable temporal behavior in Brazil, possibly influenced by failures in identification and recording. The need to improve information systems, train professionals, and standardize records to improve surveillance and neonatal care is reinforced.
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