Medication adjustment based on fractional exhaled nitric oxide (FeNO) concentration v clinical symptoms to reduce asthma exacerbations in patients with asthma at 12−24 months*
Weighted event rates
Age groupNumber of trials (n)FeNO monitoringClinical symptoms monitoringRRR (95% CI)NNT (CI)
Adults2 (197)27%30%11% (−89 to 58)Not significant
Children1 (89)17%21%22% (−87 to 67)Not significant
  • *Abbreviations defined in glossary. RRR, NNT, and CI calculated from data in article.

  • *Abbreviations defined in glossary. RRR, NNT, and CI calculated from data in article.