McCusker FX, Teehan BT, Keshaviah PR, Thorpe KE, Churchill DN
Linkage between adequacy of dialysis and nutrition in CAPD patients
Am Soc Nephrol
J Am Soc Nephrol (abstract) (Nov) 6:609 1995

This abstract again uses the CANUSA database, although only 78 of the 680 CANUSA patients are studied. Dialytic dose and a number of "nutritional" indices including serum albumin, PCR, subjective global assessment [SGA] and lean body mass are followed at 6-monthly intervals for two years. Over the two years, dialytic dose falls due entirely to loss of residual renal function. PCR and nPCR tend to fall slightly, but serum albumin, SGA and LBM all rise slightly. The authors show some correlations between dialytic dose and changes in the nutritional indices. They confirm previous observations that changes in KT/V and creatinine clearance are positively correlated with changes in PCR and nPCR. They show that there is also a positive correlation between changes in KT/V and changes in serum albumin; this is not the case for changes in creatinine clearance. Weak correlations between changes in dialytic dose and changes in SGA are shown.

A criticism would be that it is not clear whether the nutritional changes are really related to KT/V or to time on PD. It is clear in this study that KT/V and time on PD are closely correlated. It should also be pointed out that changes in KT/V in this study are totally due to change in residual renal function and so the findings may further confirm the importance of residual function in PD patients. (Blake)

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Am Soc Nephrol
CRF by organ system : Nutrition
Basic peritoneal dialysis : Chronic PD regimens, adequacy, modeling