Sir.—We have studied plasma lipid concentrations in children undergoing regular hemodialysis1 and so were interested in that group of patients included in the study by Dr Pennisi and colleagues "Hyperlipidemia in Pediatric Hemodialysis and Renal Transplant Patients" (Am J Dis Child 130:957, 1976). While we are in general agreement with their conclusions, our results showed some differences.
We studied 16 children with a mean age of 14 years (11 to 17 years). Mean energy intake was 112% ± 33% (1 SD) of the recommended daily allowance (RDA)2 for height age, and mean protein intake was 111% ± 45% (1 SD) of the RDA. Mean triglyceride concentration (TG)3 was 126 mg/100 ml ± 59 (1 SD) and mean cholesterol concentration4 was 244 mg/100 ml ± 48 (1 SD). These results were significantly higher than those in a group of healthy children of comparable age. No correlation was