CYP27B1 and asthma: Our results are consistent with the reported by a study conducted in an Asian population (China), including 143 cases of childhood bronchial asthma and 143 controls, where they showed that the G allele of CYP27B1 rs4646536 was associated with a lower risk of developing asthma (p < 0.05, OR = 0.69, 95% CI = 0.49-0.98) (34).