Impact of newborn screening on outcomes and social inequalities in cystic fibrosis: a UK CF registry-based study. Issue 2 (26th November 2019)

• Record Type: Journal Article
• Authors: Schlüter, Daniela K; Southern, Kevin W; Dryden, Carol; Diggle, Peter; Taylor-Robinson, David
• Is Part Of: Thorax. Volume 75:Issue 2(2020)
• Page Start: 123
• Page End: 131
• Publication Date: 2019-11-26
• Subjects: cystic fibrosis -- bacterial infection -- respiratory infection; Chest -- Diseases -- Periodicals; Thorax; Chest -- Diseases; Periodicals; Periodicals; 617.54
• DOI: 10.1136/thoraxjnl-2019-213179
• Languages: English
• ISSNs: 0040-6376

Abstract

Abstract : Background: Newborn bloodspot screening (NBS) for cystic fibrosis (CF) was introduced across the UK in 2007 but the impact on clinical outcomes and health inequalities for children with CF is unclear. Methods: We undertook longitudinal analyses of UK CF registry data on over 3000 children with CF born between 2000 and 2015. Clinical outcomes were the trajectories of percent predicted forced expiratory volume in one second (%FEV1 ) from age 5, weight for age and body mass index (BMI) SD-scores from age one, and time to chronic Pseudomonas aeruginosa (cPA) infection. Using mixed effects and time-to-event models we assessed the association of NBS with outcomes and potential interactions with childhood socioeconomic conditions, while adjusting for confounders. Results: NBS was associated with higher average lung function trajectory (+1.56 FEV1 percentage points 95% CI 0.1 to 3.02, n=2216), delayed onset of cPA, and higher average weight trajectory intercept at age one (+0.16 SD; 95% CI 0.07 to 0.26, n=3267) but negative rate of weight change thereafter (−0.02 SD per year; 95% CI −0.03 to −0.00). We found no significant association of NBS with BMI or rate of change of lung function. There was no clear evidence of an impact of NBS on health inequalities early in life. Conclusions: Children diagnosed with CF by NBS in the UK have better lung function and increased early weight but NBS does not appear to have narrowed early health inequalities.