VDR and diabetic kidney disease: In multivariate analysis, cardiovascular mortality in HD patients was associated with CAD (HR 1.671, 95% CI 1.028–2.718, P = 0.038), diabetic nephropathy (HR 1.825, 95% CI 1.094–3.043, P = 0.021), and major homozygosity (the CC genotype) in VDR rs2228570 (HR 1.896, 95% CI 1.163–3.091, P = 0.010).