2.2 Baseline information
At the beginning of the study (March 2022), demographic and laboratory data were collected for all patients. General information included sex, age, and dialysis vintage. Laboratory parameters included creatinine, blood urea nitrogen, hemoglobin, albumin, blood calcium, blood phosphorus, alkaline phosphatase (ALP), intact parathyroid hormone (iPTH), and total Kt/V(dialysis effectiveness index).