VDR and Parkinson disease: To identify the potential associations of VDR gene polymorphisms with the risk of PD, 12 studies about VDR FokI polymorphism (2,979 cases and 3,484 controls), 11 studies about VDR BsmI polymorphism (2,284 cases and 3,045 controls), 12 studies about TaqI polymorphism (3,001 cases and 3,566 controls), and 10 studies about VDR ApaI polymorphism (2,284 cases and 2,930 controls) were included in this meta-analysis, respectively.