PT - JOURNAL ARTICLE AU - Katrine Feldballe Bernholm AU - Anne-Sophie Homøe AU - Howraman Meteran AU - Camilla Bjørn Jensen AU - Celeste Porsbjerg AU - Vibeke Backer TI - <em>F</em><sub>eNO</sub>-based asthma management results in faster improvement of airway hyperresponsiveness AID - 10.1183/23120541.00147-2017 DP - 2018 Oct 01 TA - ERJ Open Research PG - 00147-2017 VI - 4 IP - 4 4099 - http://openres.ersjournals.com/content/4/4/00147-2017.short 4100 - http://openres.ersjournals.com/content/4/4/00147-2017.full SO - erjor2018 Oct 01; 4 AB - Asthma is characterised by inflammation and respiratory symptoms. Current asthma treatment is based on severity of asthma symptoms only. Exhaled nitric oxide fraction (FeNO) is not recommended by the Global Initiative for Asthma guidelines. The aim was to compare the usefulness of a FeNO guided versus symptom-based treatment in achieving improved asthma control assessed by airway hyperresponsiveness (AHR).80 asthmatic patients were included in a double-blinded, parallel, randomised controlled trial with follow-up visits after 8, 24 and 36 weeks. Treatment was tailored using either a FeNO or Asthma Control Questionnaire (ACQ) based algorithm. Inclusion criteria were asthma symptoms and a provocative dose causing a 15% fall in forced expiratory volume in 1 s &lt;635 mg mannitol. At each visit AHR, FeNO, ACQ and blood tests were performed.No differences between the two groups were found at inclusion. AHR from 8 to 24 weeks was improved in the FeNO group compared to the ACQ group (response dose ratio (RDR) geometric mean (95% CI): 0.02 (0.01–0.04) versus 0.05 (0.03–0.07), respectively, p=0.015). AHR to mannitol at 36 weeks showed no differences between the two groups (mean difference RDR (95% CI): −0.02 (−0.05–0.02), p=0.3). Total doses of inhaled steroid and number of exacerbations were similar (p&gt;0.05).When using FeNO as a treatment management tool, lowering of airway responsiveness occurred earlier than using ACQ. However, airway responsiveness and asthma control after 9 months were similar.Asthma management using FeNO provides faster asthma control but is similar to symptom-based management after 9 months http://ow.ly/DGNf30lqGJm