The hazard ratio was obtained from the Cox regression model adjusted for the distribution of age; sex; duration of dialysis; causes of end-stage kidney disease; body mass index; Kt/V; comorbidity of cardiovascular disease or diabetes mellitus; smoking; history of parathyroidectomy; prescriptions of anti-coagulants, vitamin D receptor activators, and phosphate binders; and serum levels of albumin, calcium, phosphorus, parathyroid hormone, alkaline phosphatase, and blood hemoglobin, in addition to systolic and diastolic blood pressure and the use of antihypertensive drugs (β-blockers, calcium channel blockers, diuretics, and others). P values for interactions were obtained from the likelihood ratio test. CI: confidence interval, HR: hazard ratio, iPTH: intact parathyroid hormone, ACEI: angiotensin-converting enzyme inhibitor, ARB: angiotensin II receptor blocker.