IL4R and asthma: In the subgroup analysis by age, the IL4RA I50V polymorphism was not associated with pediatric asthma risk (OR = 1.15, 95% CI 1.03–1.29, P = 0.01) or adult asthma risk (OR = 1.08, 95% CI 0.91–1.27, P = 0.39).