ArticleAnnals of medicine2024
Relationship between fraction of exhaled nitric oxide and peripheral eosinophilia in asthma.
Article in Annals of medicine, 2024. The graph could read no effect estimate from its abstract, so it casts no vote on the map. Cited by 5 papers.
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Who cites it
5 citing papers in PubMed.
- Effect of Chewing Gum on Fractional Exhaled Nitric Oxide Values in Patients with Asthma: A Proof of Concept Study.Journal of asthma and allergy · 2026Trial
- Longitudinal FeNO monitoring in pediatric asthma: association of FeNO and its trajectory patterns with asthma control status.Allergy, asthma, and clinical immunology : official journal of the Canadian Society of Allergy and Clinical Immunology · 2026Article
- Quantitative CT assessment of structural and functional response to omalizumab in severe allergic asthma: a prospective real-world study.BMC pulmonary medicine · 2026Observational
- Association of Blood Eosinophil Counts with Expiratory Airflow Limitation: A Multi-Ethnicity Observational Study.Journal of inflammation research · 2026Article
- Machine learning and nomogram prediction model to explore the relationship between monocyte-to-high-density lipoprotein cholesterol ratio and asthma: results from the NHANES 2001-2018.European journal of medical research · 2025Article
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Authors and funding
9 authors.
Funding
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Abstract
backgroundAchieving disease control is the goal of asthma management. Serum or sputum eosinophil counts have been known traditional means of assessing eosinophilic airway inflammation in asthma, which is vital in predicting response to corticosteroid therapy which ultimately promotes control of the disease. Evidence suggests that fraction of exhaled nitric oxide (FeNO) may be a more useful non-invasive surrogate biomarker for the assessment of eosinophilic airway inflammation and could help with the timely adjustment of inhaled corticosteroid therapy in the uncontrolled asthma patient. The relationship between FeNO and other markers of airway inflammation has been variable in literature, with limited data in sub-Saharan Africa where FeNO testing is very sparse. We sought to define the relationship between FeNO levels, serum eosinophil counts, spirometry measures and symptom control among asthma patients. MATERIALS AND
methodsThe study was conducted at the Asthma Clinic of a large tertiary hospital. This study included 82 patients with physician-diagnosed asthma being regularly managed at the clinic. All participants were taken through the asthma control test (ACT), had FeNO and spirometry measurements taken according to the American Thoracic Society (ATS) guidelines. Blood samples were obtained from all participants for serum eosinophil counts. Correlation coefficient was used to ascertain the relationship between FeNO levels and serum eosinophil counts, ACT scores, and spirometry measurements. Logistic regression was used to examine the association between high FeNO and abnormal FEV
resultsA total of 82 patients with asthma were included in the study, with higher prevalence of females (72%). Majority (40.2%) of the patients were found in the 60 and above age category. The median FeNO level and ACT score was 42.00 (26.00-52.50) parts per billion (ppb) and 20.0 (18-23) respectively. The median serum eosinophil counts was 0.25(0.90-0.38) × 10
conclusionFeNO levels significantly correlated with the ACT scores, serum eosinophil counts and FEV1% predicted among the asthma patients who were on inhaled corticosteroid therapy. High FeNO was significantly associated with abnormal FEV
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