In univariate Cox regression analysis, when age, sex, hemoglobin, phosphorus, calcium, albumin, 24-h urine volume, diabetes and cardiovascular disease (CVD) were chosen for adjustment in multivariate Cox proportional-hazards model, the risk of death among elderly PD patients was 2.54 times higher than that in the younger PD patients with a statistically significant difference (HR = 2.538, 95%CI [1.022, 6.305], P = 0.045, Table 5). This evidence concerns the gene ALB and cardiovascular disorder.