The CC genotypes of F2RL1 rs1529505 were not associated with clinical characteristics of asthma in both the additive and the dominant model; there was no association with asthma severity (p > 0.05, Table 2), FEV1 (% predicted), FEV1/FVC or serum IgE levels (p > 0.05, Table 3). This evidence concerns the gene IGHE and asthma.