RT Journal Article T1 Cross-sectional study on exhaled nitric oxide in relation to upper airway inflammatory disorders with regard to asthma and perennial sensitization. A1 Krantz, Christina A1 Accordini, Simone A1 Alving, Kjell A1 Corsico, Angelo G A1 Demoly, Pascal A1 Ferreira, Diogenes S A1 Forsberg, Bertil A1 Garcia-Aymerich, Judith A1 Gislason, Thorarinn A1 Heinrich, Joachim A1 Jõgi, Rain A1 Johannessen, Ane A1 Leynaert, Bénédicte A1 Marcon, Alessandro A1 Martínez-Moratalla Rovira, Jesús A1 Nerpin, Elisabet A1 Nowak, Dennis A1 Olin, Anna-Carin A1 Olivieri, Mario A1 Pereira-Vega, Antonio A1 Raherison-Semjen, Chantal A1 Real, Francisco Gómez A1 Sigsgaard, Torben A1 Squillacioti, Guilia A1 Janson, Christer A1 Malinovschi, Andrei A1 European Community Respiratory Health Survey III, K1 FeNO K1 asthma K1 exhaled nitric oxide K1 nasal polyposis K1 population-based K1 rhinitis AB Fractional exhaled nitric oxide (FeNO) is a well-known marker of type-2 inflammation. FeNO is elevated in asthma and allergic rhinitis, with IgE sensitization as a major determinant. We aimed to see whether there was an independent association between upper airway inflammatory disorders (UAID) and FeNO, after adjustment for asthma and sensitization, in a multi-centre population-based study. A total of 741 subjects with current asthma and 4155 non-asthmatic subjects participating in the second follow-up of the European Community Respiratory Health Survey (ECRHS III) underwent FeNO measurements. Sensitization status was based on measurement of IgE against airborne allergens; information on asthma, UAID and medication was collected through interview-led questionnaires. Independent associations between UAID and FeNO were assessed in adjusted multivariate regression models and test for interaction with perennial sensitization and asthma on the relation between UAID and FeNO were made. UAID were associated with higher FeNO after adjusting for perennial sensitization, asthma and other confounders: with 4.4 (0.9-7.9) % higher FeNO in relation to current rhinitis and 4.8 (0.7-9.2) % higher FeNO in relation to rhinoconjunctivitis. A significant interaction with perennial sensitization was found in the relationship between current rhinitis and FeNO (p = .03) and between rhinoconjunctivitis and FeNO (p = .03). After stratification by asthma and perennial sensitization, the association between current rhinitis and FeNO remained in non-asthmatic subjects with perennial sensitization, with 12.1 (0.2-25.5) % higher FeNO in subjects with current rhinitis than in those without. Current rhinitis and rhinoconjunctivitis was associated with higher FeNO, with an interaction with perennial sensitization. This further highlights the concept of united airway disease, with correlations between symptoms and inflammation in the upper and lower airways and that sensitization needs to be accounted for in the relation between FeNO and rhinitis. YR 2021 FD 2021-10-05 LK https://hdl.handle.net/10668/26540 UL https://hdl.handle.net/10668/26540 LA en DS RISalud RD Apr 8, 2025