Interaction effect between the IL4, IL13 and IL4RA genotypes among cases and controls.

aSNPs were classified as wild-type genotype and heterozygote/homozygote genotypes. The wild-type genotypes of IL4 C-590T, IL13 C-1055T, IL13 Arg130Gln, IL4RA Ile50Val, IL4RA Ser478Pro, and IL4RA Gln551Arg were TT, CC, GG, CC, TT, and AA, respectively, and the heterozygote/homozygote genotypes of these six SNPs were CT/CC, CT/TT, AG/AA, CT/TT, CT/CC, and AG/GG, respectively.bAdjusted for age and sex in logistic regression model.