The results of multivariate Cox regression analysis for the vitamin D level and other selected possible predictors of mortality in patients with AKI (Table 4) showed that regardless of adjustment for age, gender, severity of illness (SOFA score), and VDR polymorphisms, neither the 25-hydroxyvitamin D nor the 1,25-dihydroxyvitamin D level was an independent predictor of 90-day overall mortality in patients with AKI (p>0.05). The gene discussed is VDR; the disease is acute kidney injury.