Characteristics of asthmatics with detectable IL-32γ in induced sputum.

•IL-32γ was measured in sputum from stable asthmatics to evaluate the association between IL-32 and severity of asthma.•IL-32γ levels were correlated negatively with FEV1 and positively with annual exacerbation rates in asthma patients.•Annual exacerbation rates were higher in IL-32γ detectable (+) asthmatics than in non-detectable (−) asthmatics.•IL-32γ levels in sputum may be associated with asthma severity and related with higher risk of asthma exacerbation.