Prevalence and clinical implications of bronchiectasis in patients with overlapping asthma and chronic rhinosinusitis: a single-center prospective study

Table 4 Differential diagnostic values of postbronchodilator FEV₁% predicted, peripheral blood eosinophil counts and combined model in detecting bronchiectasis in asthma-CRS overlap patients

Items	Cutoff value	Sensitivity (%)	Specificity (%)	Youden index
postbronchodilator FEV₁% predicted, %	71.40	51.39	79.81	0.31
peripheral blood eosinophil counts, × 10⁹/L	0.60	41.67	77.88	0.20
combined model	0.33	72.22	70.19	0.42

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