title: Ethnic variability in peritoneal equilibration test and urea kinetics.
abstract: The influence of ethnicity on peritoneal permeability and the adequacy of peritoneal dialysis was studied in 202 end-stage renal failure patients on peritoneal dialysis. Patients were classified into whites, Orientals, blacks, and a miscellaneous group consisting of East Indians, Persians, and others whose ethnicity was unknown. The patients were on peritoneal dialysis for a mean period of 29.1 +/- 15.8 months before the study. All patients underwent a peritoneal equilibration test with 24-hour urine and dialysate collection. The kinetic parameters were calculated using commercial software (PD Adequest; Baxter Healthcare, Round Lake, IL). The mean volume of exchange, weekly Kt/V, and weekly creatinine clearance were comparable in the different ethnic groups, but the normalized protein catabolic rate was significantly higher in the Orientals (P = 0.03). The high transporters tended to be males with a large body surface area and in the older age group. The low transporters achieved a higher Kt/V than those in the other transport groups (2.3 +/- 0.4 v 2.06 +/- 0.52; P = 0.015). The women had a significantly higher Kt/V than the men (2.16 +/- 0.43 v 1.93 +/- 0.59; P < 0.01). Repeat peritoneal equilibration test was done after a mean duration of 10.5 +/- 4.9 months in 33 patients. Although the mean exchange volume (8.37 +/- 0.83 v 9.32 +/- 1.72; P = 0.003) increased significantly, weekly creatinine clearance (62.3 +/- 25.6 L/1.73 m2 to 63.1 +/- 18.3 L/1.73 m2; P < 0.05) and other kinetic parameters did not change markedly with duration. There was a tendency for the patients to move from the extreme transport groups to the average category with duration.
authors.affiliation: Division of Nephrology, Louisiana State University Medical Center, Shreveport, USA.
authors.forename: D S
authors.initials: DS
authors.lastname: Raj
authors.forename: V
authors.initials: V
authors.lastname: Langos
authors.forename: N
authors.initials: N
authors.lastname: Gangam
authors.forename: J
authors.initials: J
authors.lastname: Roscoe
mesh_terms: D044466:Asian People; D001692:Biological Transport; D044383:Black People; D003928:Diabetic Nephropathies / Q000378:metabolism; D005006:Ethnicity; D005260:Female; D006801:Humans; D007676:Kidney Failure, Chronic / Q000378:metabolism* / Q000628:therapy*; D008297:Male; D008875:Middle Aged; D010530:Peritoneal Dialysis; D010537:Peritoneum / Q000378:metabolism*; D010539:Permeability; D044469:Racial Groups; D012737:Sex Factors; D014508:Urea / Q000378:metabolism*; D044465:White People
chemical_list: D014508:Urea