Figure 1. ROC curves for the models of FEF combined
with FENO for predicting positive bronchial provocation tests (n =
692).
(A) FEF50% combined with FENO. AUCModel= 0.845 (95% CI, 0.812-0.878); AUCFENO = 0.748 (95%
CI, 0.702-0.793; P < 0.001, compared with the model);
AUCFEF50% = 0.762 (95% CI, 0.721-0.803; P< .001, compared with the model).
(B) FEF75% combined with FENO. AUCModel= 0.824 (95% CI, 0.788-0.859); AUCFENO =0.748 (95% CI,
0.702-0.793; P < 0.001, compared with the model);
AUCFEF75% = 0.745 (95% CI, 0.703 - 0.786; P< 0.001, compared with the model).
(C) FEF25%-75% combined with FENO.
AUCModel = 0.844 (95% CI, 0.811- 0.876);
AUCFENO =0.748 (95% CI, 0.702-0.793; P< 0.001, compared with the model);
AUCFEF25%-75% = 0.763 (95% CI, 0.723 - 0.802;P < 0.001, compared with the model).
(D) FEV1/FVC combined with FENO.
AUCModel = 0.807 (95% CI, 0.769-0.844);
AUCFENO = 0.748 (95% CI, 0.702-0.793; P = 0.001,
compared with the model); AUCFEV1/FVC = 0.713 (95% CI,
0.669-0.758).