Table 3.

Specific data to be collected

Category	Detailed data
Demographic data	Age; sex; marital status; ethnicity; weight; height; housing details (number of persons in the household, living space in square meters, rent/ownership); care level (if applicable)
Medical history	Comorbidities; current medication use; circumstances of and preparation for starting of dialysis; current dialysis regimen (including number of weekly sessions, Kt/V, dialysate composition and volume, incremental dialysis regimens, if applicable); residual urine excretion (if applicable); reasons for choice of dialysis type (personal preference/medical indications)
Clinical course	Number, duration, and reason for hospital admissions since start of dialysis/in the last year/since the last visit; frequency of outpatient medical consultations and laboratory checks; complications associated with the dialysis procedure; cardiovascular complications; need for care/increase of care level; date and cause of death (if applicable)
Estimated working time of medical staff in association with dialysis treatment	Duration of medical and nursing consultations; time required for learning the dialysis procedure
Laboratory data (as available from routine healthcare)	Blood count; electrolytes; clinical chemistry; lipid status; urinalysis
Quality of life	‘Kidney Disease Quality of Life 36-Item Short Form Survey (KDQOL-36)’ for patients and ‘Burden Scale for Family Caregivers (BSFC)’ for family caregivers
Biomaterials	Whole blood (15 mL per timepoint) and overnight peritoneal effluent