95% CI, 95% confidence interval; The other abbreviations are as defined for Table 1 and Table 3.

We used the larger of the 2 univariate AUCs to make the comparison;

^†Contrast, the difference between AUC of FENO and AUC of bivariate model;

^‡Contrast, the difference between AUC of FEFs and AUC of bivariate model;

P value, contrast’s chi-square test for the significance of the contrast.

Table 5. Stratified analysis of patients with chest-tightness: predictive values of combinations of different variables with FENO in predicting bronchial hyperresponsiveness