In the univariate regression analysis, patient characteristics emerged as potential predictors of the composite primary outcome (in-hospital death or ICU admission) were age, 25-OH-D, CRP, procalcitonin, IL-6, creatinine, time from symptoms onset to hospitalization, diabetes mellitus, serum calcium values and category of serum calcium (tertile I vs tertile II + III), as shown in Table 2. The gene discussed is IL6; the disease is diabetes mellitus.