{"status":"ok","message-type":"work","message-version":"1.0.0","message":{"indexed":{"date-parts":[[2026,9,1]],"date-time":"2026-09-01T23:02:42Z","timestamp":1788303762879,"version":"build-2803163510"},"reference-count":45,"publisher":"American Medical Association (AMA)","issue":"10","content-domain":{"domain":[],"crossmark-restriction":false},"short-container-title":["JAMA Pediatr"],"published-print":{"date-parts":[[2022,10,1]]},"abstract":"Importance<\/jats:title>Newborn screening (NBS) for cystic fibrosis (CF) has been universal in the US since 2010, but its association with clinical outcomes is unclear.<\/jats:p><\/jats:sec>Objective<\/jats:title>To describe the real-world effectiveness of NBS programs for CF in the US on outcomes up to age 10 years.<\/jats:p><\/jats:sec>Design, Setting, and Participants<\/jats:title>This was a retrospective cohort study using CF Foundation Patient Registry data from January 1, 2000, to December 31, 2018. The staggered implementation of NBS programs by state was used to compare longitudinal outcomes among children in the same birth cohort born before vs after the implementation of NBS for CF in their state of birth. Participants included children with an established diagnosis of CF born between January 1, 2000, to December 31, 2018, in any of the 44 states that implemented NBS for CF between 2003 and 2010. Data were analyzed from October 5, 2020, to April 22, 2022.<\/jats:p><\/jats:sec>Exposures<\/jats:title>Birth before vs after the implementation of NBS for CF in the state of birth.<\/jats:p><\/jats:sec>Main Outcomes and Measures<\/jats:title>Longitudinal trajectory of height and weight percentiles from diagnosis, lung function (forced expiratory volume in 1 second, [FEV1<\/jats:sub>] percent predicted) from age 6 years, and age at initial and chronic infection with Pseudomonas aeruginosa<\/jats:italic> using linear mixed-effects and time-to-event models adjusting for birth cohort and potential confounders.<\/jats:p><\/jats:sec>Results<\/jats:title>A total of 9571 participants (4713 female participants [49.2%]) were eligible for inclusion, with 4510 (47.1%) in the pre-NBS cohort. NBS was associated with higher weight and height percentiles in the first year of life (weight, 6.0; 95% CI, 3.1-8.4; height, 6.6; 95% CI, 3.8-9.3), but these differences decreased with age. There was no association between NBS and FEV1<\/jats:sub> at age 6 years, but the percent-predicted FEV1<\/jats:sub> did increase more rapidly with age in the post-NBS cohort. NBS was associated with older age at chronic P aeruginosa<\/jats:italic> infection (hazard ratio, 0.69; 95% CI, 0.54-0.89) but not initial P aeruginosa<\/jats:italic> infection (hazard ratio, 0.88; 95% CI, 0.77-1.01).<\/jats:p><\/jats:sec>Conclusions and Relevance<\/jats:title>NBS for CF in the US was associated with improved nutritional status up to age 10 years, a more rapid increase in lung function, and delayed chronic P aeruginosa<\/jats:italic> infection. In the future, as highly effective modulator therapies become available for infants with CF, NBS will allow for presymptomatic initiation of these disease-modifying therapies before irreversible organ damage.<\/jats:p><\/jats:sec>","DOI":"10.1001\/jamapediatrics.2022.2674","type":"journal-article","created":{"date-parts":[[2022,8,1]],"date-time":"2022-08-01T15:05:28Z","timestamp":1659366328000},"page":"990","source":"Crossref","is-referenced-by-count":39,"title":["Real-world Associations of US Cystic Fibrosis Newborn Screening Programs With Nutritional and Pulmonary Outcomes"],"prefix":"10.1001","volume":"176","author":[{"given":"Margaret","family":"Rosenfeld","sequence":"first","affiliation":[{"name":"Division of Pulmonary and Sleep Medicine, Seattle Children\u2019s Hospital, Seattle, Washington"},{"name":"Department of Pediatrics, University of Washington, 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