VDR and asthma: In a meta-analysis including 18 mixed population studies (Egypt, Turkey, Chile, China, Ireland, Greece, Tunisia, Cyprus, and the USA), the VDR FokI T allele was associated with a decrease in asthma risk in the dominant model (p = 0.016, OR = 0.77, 95%CI = 0.63-0.95, TT+CT vs. CC) (36).