FeNO was significantly correlated with WA/BSA of the sixth-generation bronchi (but not with those of the third- to fifth-generation bronchi) when adjusted for age, duration of asthma, blood eosinophil percentage, blood total IgE, dose of inhaled corticosteroid, and Ai/BSA (ρ = 0.360, p = 0.034, Table 6). The gene discussed is IGHE; the disease is asthma.