In contrast, the CA heterozygous IL10-571C>A genotype was increased in patients with asthma and Ole e 2 sensitization compared with Ole e 2 nonsensitized patients with asthma (45.7% versus 21.4%, P = 0.02, OR, 3.08; 95% CI, 1.13–8.4). This evidence concerns the gene IL10 and asthma.