Based on the result of univariate Cox proportional regression (Supplementary Table 1), the multivariate Cox regression model showed that increased age, comorbidity of diabetes mellitus, peritonitis, lower albumin levels, PTH (<100, or ≥300 pg/ml), hypocalcemia (CorCa < 2.13 mmol/L) and hyperphosphatemia (≥1.45 mmol/L) were associated with increased all-cause mortality but not cardiovascular mortality (data not shown). This evidence concerns the gene PTH and Hypocalcemia.