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Determinants of eGFR at start of renal replacement therapy in paediatric patients
Karlijn J van Stralen1, E Jane Tizard, Kitty J Jager
1ESPN/ERA-EDTA Registry, Department of Medicine, Academic Medical Center, University of Amsterdam, Amsterdam, The Netherlands. K.J.vanStralen@amc.uva.nl
Insights
Glomerular filtration rate (GFR) in children starting renal replacement therapy (RRT) is influenced by age, gender, and treatment type. Understanding these factors is crucial for pediatric nephrology care.
Area of Science:
- Pediatric Nephrology
- Renal Replacement Therapy
- Glomerular Filtration Rate
Background:
- Limited research exists on factors affecting glomerular filtration rate (GFR) in pediatric patients initiating dialysis or transplantation.
- Understanding GFR determinants is vital for optimizing care in children with kidney failure.
Purpose of the Study:
- To investigate the key determinants of estimated glomerular filtration rate (eGFR) at the initiation of renal replacement therapy (RRT) in pediatric patients.
- To identify factors influencing eGFR in children under 18 starting RRT.
Main Methods:
- Utilized data from the European Society of Paediatric Nephrology/European Renal Association-European Dialysis and Transplant Association registry (2002-2007).
- Included incident pediatric patients (<18 years) starting RRT across 14 European countries.
- Calculated eGFR using the Schwartz formula and adjusted for age, gender, treatment modality, primary renal disease (PRD), and European region (eGFR(adj)).
Main Results:
- Median eGFR at RRT initiation was 10.4 mL/min/1.73 m(2) for 938 patients.
- Lower eGFR was associated with younger age, female gender, starting dialysis, and a shorter interval between first pediatric nephrologist visit and RRT.
- Primary renal diseases showed varying GFR decline rates but did not impact adjusted eGFR at RRT start.
Conclusions:
- Age, gender, treatment modality, and time to RRT are primary determinants of eGFR at RRT initiation in children.
- Further research is necessary to understand the clinical implications of these identified GFR determinants.
Background:
Few studies have investigated the determinants of glomerular filtration rate (GFR) in paediatric patients starting on dialysis or with a transplant.
Methods:
Data were collected as part of the European Society of Paediatric Nephrology/European Renal Association-European Dialysis and Transplant Association registry from 14 European countries and referred to incident paediatric patients starting on renal replacement therapy (RRT) between 2002 and 2007 under the age of 18 years. Estimated glomerular filtration rate (eGFR) was calculated using the Schwartz formula. Data were adjusted for age, gender, treatment modality at start, primary cause of renal failure (PRD) and regions in Europe (eGFR(adj)).
Results:
Median eGFR in the 938 patients starting RRT was 10.4 mL/min/1.73 m(2) (5th and 95th percentile: 4.0-26.9). Twenty-six patients (2.8%), mainly infants with Finnish-type nephropathy, started with eGFR levels >50 mL/min/1.73 m(2). Younger age, female gender, starting on dialysis and having a short time between the first visit to a paediatric nephrologist (PN) and start of RRT were associated with lower eGFR at start of RRT. Gender differences were only present during adolescent age and disappeared when using the same K value for both genders. The various PRDs showed large differences in the rate of decline in eGFR between the first visit to a PN and start of RRT; however, this did not result in differences in eGFR(adj) at start of RRT.
Conclusions:
The main determinants of eGFR at start of RRT were age, gender, treatment modality at start, and the time between the first visit to a PN and start of RRT. Research is needed to determine the consequences of these differences.
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