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The Brazilian neonatal screening program established in 2001 included the investigation of cystic fibrosis (CF) in the phase III of the program. For this purpose, the immunoreactive trypsin (IRT) measurement was added to the newborn screening test. The purpose of National Neonatal Screening Program is to reach 100% of live births in Brazil. The aim of this study was to analyze the coverage of neonatal Screening for Cystic Fibrosis (CF) in Brazil from 2008 to 2017. This is an ecological study design based on data collected from the Brazilian Outpatient Information System regarding the detection of IRT as a component of the heel stick test from 2008 to 2017. Moreover, we gathered data from the Brazilian Live Birth Information System referring to live births from 2008 to 2017. We calculated the coverage of IRT measurement for every 100 live births, using the number of IRT measurement procedures as the numerator and the number of live births stratified by federative units (states), as well as by the Brazilian regions as the denominator. These regions correspond to the divisions of the national territory based on criteria such as natural, social, cultural and economic aspects. From 2008 to 2017, the regions presented the following coverage medians: South (84.1%), Southeast (71.4%), Midwest (47.3%) Northeast (12.3%) and North (10.9%). In the analysis of federative units, in the years 2013 to 2017, Paraná and Distrito Federal presented the highest median of coverage (100%), while the states with the lowest median were Rio Grande do Norte (12.1%), Amazonas (16.8%) and Paraíba (27.5%). Highest coverage was found in the South region, where are located most of the states with high socioeconomic development and high supply of health services, while the lowest coverage was found in the North region, where are located manly the states with low socioeconomic development and low supply of health services. According to data from the Brazilian Ministry of Health, the universalization of neonatal screening for cystic fibrosis occurred in 2013, however, at the end of this year, most states in the North and Northeast regions had not registered IRT measurements in the Outpatient Information System. Although the coverage of neonatal screening for CF has improved nationwide over the years of the study, the disparity in the coverage of IRT measurements at the interregional and interstate levels is notable. Systematic implementation of neonatal screening for cystic fibrosis with equity and access to the entire population is suggested, leading to a greater number of children benefiting from treatment and a better quality of life.

Analysis of national coverage of neonatal cystic fibrosis screening in Brazil from 2008 to 2017