Low nutritional vitamin D levels were associated with higher mortality (OR: 1.20, 95% CI: 1.03–1.41, p = 0.02), along with low hemoglobin (Hb > 10 g/dL, OR: 1.26, 95% CI: 1.10–1.44, p < 0.01), hypercalcemia (Ca > 10.5 mg/dL, OR: 1.27, 95% CI: 1.05–1.54, p = 0.01), and hypoalbuminemia (albumin < 3.5 g/dL, OR: 1.23, 95% CI: 1.07–1.41, p < 0.01). The gene discussed is GSTM1; the disease is hypercalcemia disease.