VDR and intervertebral disk degenerative disorder: There was a significant association between VDR TaqI mutation and risk of disc degeneration (Homozygote model, OR with 95%CI 1.167, [1.050, 1.290]; Recessive model, OR with 95%CI 1.194, [1.034, 1.378]; Additive model, OR with 95%CI, 1.085, [1.020, 1.154] Fig. 3).