VDR and intervertebral disk degenerative disorder: However, our findings demonstrated that rs731236 polymorphism of the VDR gene was not associated with IDD, on the contrary, a report of the Finnish population, Videman et al. found that the signal intensities of thoracic and lumbar (T6-S1) discs were 12.9% worse in men with the CC genotype and 4.5% worse in men with the TC genotype, compared with signal intensity in men with the TT genotype [17].