IQR, interquartile range; BMI, body mass index; IgE: immunoglobulin E; FeNO, fractional nitric oxide; Rrs5, resistance of respiratory system at 5 Hz; Rrs5-20, the difference of the Rrs at 5 Hz and 20 Hz; AX, reactance area

^*Number of exposed or cases.

^†Inhalant allergen-specific IgE > 0.35 kU/L for at least 1 of 6 allergens (Alternaria , birch, cat dander, dog dander, Dermatophagoides farina , Japanese hop).

Table 2. Association of low and high MWP metabolites with Rrs5 and FeNO.