Univariate Cox regression analysis showed that age, gender, education level, diabetes mellitus, cardiovascular disease, duration of dialysis, high-sensitivity C-reactive protein, serum albumin, serum sodium, serum creatinine, intact parathyroid hormone, measured glomerular filtration rate, frailty and cognitive function status were associated with mortality in patients on CAPD (all P < 0.05). Here, PTH is linked to diabetes mellitus.