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Sensitivity of biomarkers for eosinophilic airway inflammation. A, Probability of composite eosinophil status = “high” as a function of serum periostin. Dashed lines denote 95% CIs. B, Receiver operating characteristic curve analysis of the sensitivity and specificity of serum periostin, Feno, and serum IgE levels and blood eosinophil numbers for composite airway eosinophil status. AUC, Area under the curve.
