This result was inconsistent with finding from Wang et al.37Wang et al. demonstrated that there were no significant differences of serum IL‐33 between severe versus moderate asthma (SMD = 0.35, 95% CI: −0.08 to 0.78) and moderate versus mild asthma (SMD = 0.69, 95% CI: ‐0.47 to 1.86) among children, respectively. This evidence concerns the gene IL33 and asthma.