As shown in Table 9, we found no differences in the plasma BDNF concentrations between asthma patients with T2-high and T2-low (p = 0.43), non-allergic and allergic (p = 0.41), and eosinophilic versus non-eosinophilic asthma (p = 0.54) phenotypes. This evidence concerns the gene BDNF and asthma.