Table 1.

Study visits of the HD/HP versus HD trial

	V1	V2	V3	V4	V5	V6	V7
	−1M	0M	3M±14d	6M±14d	12M±14d	18M±14d	24M±14d
Consent form	×
Medical history	×	×	×	×	×	×	×
Physical examination	×	×	×	×	×	×	×
Eligibility		×
Dialysis regimen	×	×	×	×	×	×	×
Blood routine and coagulation test	×	×	×	×	×	×	×
Blood chemistry*	×			×	×	×	×
Residual kidney function	×
Serum iPTH	×			×	×	×	×
Serum hsCRP	×			×	×	×	×
Serum β2-microglobulin	×			×	×	×	×
Serum cysteine	×			×	×	×	×
Standard Kt/V	×			×	×	×	×
ECG	×				×		×
Chest X-ray	×				×		×
Echocardiography	×				×		×
Heart function rating	×	×	×	×	×	×	×
KDQOL-SF		×			×		×
Adjustment of dialysis regimen		×	×	×	×	×	×
Comorbidity	×	×	×	×	×	×	×
Medications	×	×	×	×	×	×	×
Adverse events		×	×	×	×	×	×

*Blood chemistry includes liver function series (total bilirubin, direct bilirubin, alanine aminotransferase, aspartate aminotransferase, serum total protein, albumin, γ-glutamyltransferase and alkaline phosphatase), serum blood urea nitrogen and creatinine, electrolytes (natrium, potassium, calcium and phosphate), glucose, creatine kinase and its isoform creatine kinase - MB (CK-MB), troponin I, myohemoglobin, lactate dehydrogenase, hydroxybutyrate dehydrogenase, pro b-type natriuretic peptide.

HD, haemodialysis; HP, haemoperfusion; KDQOL-SF, Kidney Disease Quality of Life Short Form.