Baseline and demographic characteristics in datasets.

No statistical differences in baseline and demographic characteristics between datasets were observed. Values are expressed as mean ± standard deviation. Serum intact PTH level, vintage and follow-up days are also shown as median and interquartile range. The values were compared between the datasets by the chi-square test, t-test, or Mann-Whitney U-test as appropriate. Abbreviations: SI, Survival index; BMI, body mass index; CVDs, cardiovascular diseases as comorbid conditions; DM, diabetes mellitus as a cause of end-stage renal disease; PTH, parathyroid hormone; nPCR, normalized protein catabolic rate; GNRI, geriatric nutritional risk index; CS, Combined score; AVF, arteriovenous fistula use; PEW, protein energy wasting. Baseline and demographic characteristics in datasets.