IL4 and asthma: In addition, when analyzed byethnicity, significant associations were found in Asians andCaucasians, but not in African Americans (Nie et al., 2013).However, some studies obtained different results, for instance,the analysis of genotypes associated with asthma for C-589T ofthe IL4 gene did not reveal statistically significant differencesbetween the control group and the group of asthma patients,which might be due to the small number of studied samples(Rudenko et al., 2021).