Figure 1.

FeNO values in the different lung disease cohorts vs. healthy controls. Given are the median (horizontal bar) with interquartile range as well as single data (dots). uILD, RB–ILD, COP, HP, sarcoidosis and CTD–ILD have been summarized as “ILD” and are shown separately in blue on the right margin. Abbreviations: IPF: idiopathic pulmonary fibrosis, ILD: interstitial lung diseases, HP: hypersensitivity pneumonitis, COPD: chronic obstructive pulmonary disease, COP: cryptogenic organizing pneumonia, CTD–ILD: connective tissue disease-associated ILD, LC: lung cancer, NSIP: nonspecific interstitial pneumonia, RB–ILD: respiratory bronchiolitis ILD, uILD: unclassifiable ILD. If data not available from all patients, the number(s) is specified.