The aim of this study was to compare the changes in peritoneal function and residual renal function in the first year between diabetic and non‐diabetic patients receiving peritoneal dialysis (PD). We extracted 73 incident PD patients (male, 73%; age, 59 ± 15 years) from a previous cohort, and investigated the changes in PD‐related parameters, including the dialysate to plasma ratio of creatinine (D/P Cr) and Kt/V. D/P Cr increased in non‐diabetics, whereas it did not change significantly in diabetic patients. These differences were more pronounced among icodextrin users. On multivariate analysis, the presence of diabetes was independently associated with the changes in D/P Cr. On the contrary, there was no significant difference in the changes of renal Kt/V between the two groups. A higher peritoneal solute transport rate at the start of PD in diabetics was attenuated within 1 year. Icodextrin is thought to have an important role through improving body fluid status.
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