FeNO was measured in 67.8% of children at 6 months of follow-up (median: 4, CI: 0.0–8.6 ppb), 74.4% at 12 months (median: 6.0, CI: 2.8–12.0 ppb), 83.5% at month 18 (median: 8.0, CI: 4.0–14.0 ppb) and 72.1% at the final visit (median: 8.5, CI: 4.4–14.5 ppb), suggesting an increasing trend with time/age in asthmatics.
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Evolution of Airway Inflammation in Preschoolers with Asthma-Results of a Two-Year Longitudinal Study.
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