Title: FP817ASSESSMENT OF HYDRATION STATUS CHANGES BY BIO-IMPEDANCE SPECTROSCOPY IN CHILDREN ON PERITONEAL DIALYSIS
Abstract: RESULTS: A positive correlation eGFRcys/eGFRcrea and %prediction error for eGFRBTP was found.Patients with SPS had lower %prediction error for eGFRcys and eGFRBTP and higher Cin regardless of the definition.However, the overestimation of eGFRcrea in patients with SPS was only present when using the eGFRcys/eGFRcrea rather than the eGFRcys/Cin definition challenging the causality between shrunken pores and muscle wasting.CONCLUSIONS: CysC and BTP are related independently of creatinine, suggesting glomerular pore size as a common denominator.For research in SPS, the definition should be based on eGFRcys/Cin rather than the eGFRcys/eGFRcrea-ratio to exclude extrarenal factors affecting creatinine metabolism.