In the stratified analysis by ethnicity, no association was found between asthma and IL-10 -592 C/A polymorphisms in East Asian, and West Asian groups, only except for West Asians using homozygote contrast (OR = 5.70, 95% CI = 2.38–13.6, p<0.0001) (Table 4). This evidence concerns the gene IL10 and asthma.