FC 118DIALYSIS WITHDRAWAL IN THE NETHERLANDS BETWEEN 2000-2020: TIME TRENDS AND CENTRE VARIATION
Abstract Background and Aims Treatment withdrawal is an important cause of death among dialysis-dependent patients. Widely variable withdrawal rates were reported in studies using varying designs and definitions in culturally different regions of the world, limiting comparability of individual studies. Cessation of life-prolonging treatment is a well-accepted option in the Netherlands, however it is unclear if these premises result in higher dialysis withdrawal rates and if this effect is generalisable. This study aims to describe dialysis withdrawal practice in the Netherlands, focussing on time trends and practice variation between centres. Method Patient data was retrieved from RENINE, the Dutch national registration which includes nearly all patients requiring dialysis for at least 28 days. All patients who initiated maintenance dialysis from January 1, 2000, to December 31, 2020, and died within this period were included for analysis. Since the primary aim of this study concerned cause of death on dialysis, data of patients in whom dialysis was stopped due to kidney transplantation or recovery of kidney function, were excluded. Main outcome was death by dialysis withdrawal, as registered by the treating physician using ERA-EDTA codes. Other causes of death were used as comparison. Time trends for dialysis withdrawal were first analysed as unadjusted data (proportion per year). Univariable logistic regression analyses were then used to identify factors associated with dialysis withdrawal, including year of death in five-year strata. A multivariable model was subsequently used to determine risks, adjusting for factors associated with dialysis withdrawal. Centre variation was compared visually by using funnel plots. Results A total of 34.692 patients commenced maintenance dialysis of which 20.389 died. After applying exclusion criteria, a cohort of 18.412 patients was used for analysis. Dialysis withdrawal was an increasingly common cause of death, increasing from 13.5% in 2000 to 31.2% in 2019 (22.1% overall). In multivariable analysis, increasing age, female sex, increasing dialysis vintage, haemodialysis as treatment modality, and year of death were independent factors associated with death by dialysis withdrawal. Centre variation was large, even after correction for confounding factors (36.6% outside 95% control limits). Conclusion Treatment withdrawal has become the main cause of death in the Netherlands among dialysis-dependent patients during 2000-2020. Large practice variations were observed between centres, even after correction for confounding factors. These findings emphasize the need for timely advance care planning and urge treating health care professionals to better inform their patients when choosing to start dialysis or not.