Methods
Study patients and design
The first study objective examined prevalent dialysis
patients, and consisted of a cross-sectional cohort and a
prospective cohort, with a median follow-up time of
3.6 years. All adult patients (≥18 years) receiving haemodialysis
or peritoneal dialysis in 10 different dialysis units
(with a catchment area of more than two millions persons)
were screened for study participation.