However, cytokine distribution varied according to pulmonary function: IL‐17 (p = 0.001) and IL‐5 (p = 0.045) were associated with the presence of airway obstruction, and IL‐17 also differed according to bronchodilator response in FEV1 (p = 0.041) (Table 3). The gene discussed is IL17A; the disease is Airway obstruction.