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DOI: 10.1055/s-0044-1778750
The German Asthma Net: FeNO dynamics mark long-term asthma burden and lung function changes
Authors
The fraction of exhaled nitric oxide (FeNO) is a biomarker for type 2 inflammation in asthma, but the significance of long-term FeNO changes on relevant parameters is unclear.
This longitudinal study assesses FeNO differences at a follow-up of (mean±SD) 16.2±15.1 months in 526 patients of the German Asthma Net (GAN), an international, multi-centre, and real-life registry of patients with severe asthma, through Kruskal-Wallis tests.
Patients who showed any FeNO reductions had a significant reduction in their yearly exacerbation rate and maintenance corticosteroid use (OCS), clinically significant improvements in asthma control and quality of life, and significantly improved FEV1 in% predicted compared to patients with a FeNO increase (all p < 0.05). Patients with a FeNO reduction of more than 25 ppb at follow-up improved their FEV1 by 14% predicted in the mean. The rate of treatment with biologics was similar between groups ([Abb. 1]).


In conclusion, we could show that long-term FeNO level reductions mark significant and clinically relevant improvements in vital parameters of disease burden, underscoring its relevance in assessing the underlying type 2 inflammation in patients with severe asthma.
Publication History
Article published online:
01 March 2024
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