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Does Treatment Guided by Fractional Exhaled Nitric Oxide Improve Outcomes in Subgroups of Children with Asthma?
PDPI Lampung & Bengkulu, 18 Mar 2020 18:48:38

Abstract

Introduction Fractional exhaled nitric oxide (FENO), a biomarker of eosinophilic airway inflammation, may be useful to guide asthma treatment. FENO guided treatment may be more effective in certain subgroups for improving asthma outcomes compared to standard treatment.

Methods An individual patient data analysis was performed using data from seven randomised clinical trials (RCT) which used FENO to guide asthma treatment. The incidence of an asthma exacerbation and loss of control, and the time to first exacerbation and loss of control were described between five subgroups of RCT participants.

Results Data were available in 1112 RCT participants. Among those not treated with Leukotriene Receptor Antagonist (LTRA), but not among those who were treated with LTRA, FENO guided treatment was associated with reduced exacerbation risk (odds ratio (OR) 0.68 [95% CI 0.49, 0.94]), longer time to first exacerbation (hazard ratio (HR) 0.76 [0.57, 0.99]) and borderline reduced risk for loss of control (OR 0.70 [0.49, 1.00]). Non-obese children, compared to obese children, were less likely to lose asthma control when treatment was guided by FENO (OR 0.69 [0.48, 0.99]) and time to loss of control was longer (HR 0.77 [0.61, 0.99]).

Conclusions Asthma treatment guided by FENO may be more effective in achieving better asthma outcomes for patients who are not treated with LTRA and who are not obese compared to standard practice.

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